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3639 lines
144 KiB
3639 lines
144 KiB
/*
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* Copyright (c) 1994, 2014, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.lang;
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import java.lang.reflect.AnnotatedElement;
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import java.lang.reflect.Array;
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import java.lang.reflect.GenericArrayType;
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import java.lang.reflect.GenericDeclaration;
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import java.lang.reflect.Member;
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import java.lang.reflect.Field;
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import java.lang.reflect.Executable;
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import java.lang.reflect.Method;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Modifier;
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import java.lang.reflect.Type;
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import java.lang.reflect.TypeVariable;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.AnnotatedType;
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import java.lang.ref.SoftReference;
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import java.io.InputStream;
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import java.io.ObjectStreamField;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Set;
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import java.util.Map;
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import java.util.HashMap;
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import java.util.Objects;
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import sun.misc.Unsafe;
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import sun.reflect.CallerSensitive;
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import sun.reflect.ConstantPool;
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import sun.reflect.Reflection;
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import sun.reflect.ReflectionFactory;
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import sun.reflect.generics.factory.CoreReflectionFactory;
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import sun.reflect.generics.factory.GenericsFactory;
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import sun.reflect.generics.repository.ClassRepository;
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import sun.reflect.generics.repository.MethodRepository;
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import sun.reflect.generics.repository.ConstructorRepository;
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import sun.reflect.generics.scope.ClassScope;
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import sun.security.util.SecurityConstants;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Proxy;
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import sun.reflect.annotation.*;
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import sun.reflect.misc.ReflectUtil;
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/**
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* Instances of the class {@code Class} represent classes and
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* interfaces in a running Java application. An enum is a kind of
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* class and an annotation is a kind of interface. Every array also
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* belongs to a class that is reflected as a {@code Class} object
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* that is shared by all arrays with the same element type and number
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* of dimensions. The primitive Java types ({@code boolean},
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* {@code byte}, {@code char}, {@code short},
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* {@code int}, {@code long}, {@code float}, and
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* {@code double}), and the keyword {@code void} are also
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* represented as {@code Class} objects.
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*
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* <p> {@code Class} has no public constructor. Instead {@code Class}
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* objects are constructed automatically by the Java Virtual Machine as classes
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* are loaded and by calls to the {@code defineClass} method in the class
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* loader.
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*
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* <p> The following example uses a {@code Class} object to print the
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* class name of an object:
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*
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* <blockquote><pre>
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* void printClassName(Object obj) {
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* System.out.println("The class of " + obj +
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* " is " + obj.getClass().getName());
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* }
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* </pre></blockquote>
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*
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* <p> It is also possible to get the {@code Class} object for a named
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* type (or for void) using a class literal. See Section 15.8.2 of
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* <cite>The Java™ Language Specification</cite>.
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* For example:
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*
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* <blockquote>
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* {@code System.out.println("The name of class Foo is: "+Foo.class.getName());}
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* </blockquote>
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*
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* @param <T> the type of the class modeled by this {@code Class}
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* object. For example, the type of {@code String.class} is {@code
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* Class<String>}. Use {@code Class<?>} if the class being modeled is
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* unknown.
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*
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* @author unascribed
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* @see java.lang.ClassLoader#defineClass(byte[], int, int)
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* @since JDK1.0
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*/
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public final class Class<T> implements java.io.Serializable,
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GenericDeclaration,
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Type,
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AnnotatedElement {
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private static final int ANNOTATION= 0x00002000;
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private static final int ENUM = 0x00004000;
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private static final int SYNTHETIC = 0x00001000;
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private static native void registerNatives();
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static {
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registerNatives();
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}
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/*
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* Private constructor. Only the Java Virtual Machine creates Class objects.
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* This constructor is not used and prevents the default constructor being
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* generated.
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*/
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private Class(ClassLoader loader) {
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// Initialize final field for classLoader. The initialization value of non-null
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// prevents future JIT optimizations from assuming this final field is null.
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classLoader = loader;
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}
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/**
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* Converts the object to a string. The string representation is the
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* string "class" or "interface", followed by a space, and then by the
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* fully qualified name of the class in the format returned by
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* {@code getName}. If this {@code Class} object represents a
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* primitive type, this method returns the name of the primitive type. If
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* this {@code Class} object represents void this method returns
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* "void".
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*
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* @return a string representation of this class object.
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*/
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public String toString() {
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return (isInterface() ? "interface " : (isPrimitive() ? "" : "class "))
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+ getName();
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}
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/**
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* Returns a string describing this {@code Class}, including
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* information about modifiers and type parameters.
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*
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* The string is formatted as a list of type modifiers, if any,
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* followed by the kind of type (empty string for primitive types
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* and {@code class}, {@code enum}, {@code interface}, or
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* <code>@</code>{@code interface}, as appropriate), followed
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* by the type's name, followed by an angle-bracketed
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* comma-separated list of the type's type parameters, if any.
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*
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* A space is used to separate modifiers from one another and to
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* separate any modifiers from the kind of type. The modifiers
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* occur in canonical order. If there are no type parameters, the
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* type parameter list is elided.
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*
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* <p>Note that since information about the runtime representation
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* of a type is being generated, modifiers not present on the
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* originating source code or illegal on the originating source
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* code may be present.
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*
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* @return a string describing this {@code Class}, including
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* information about modifiers and type parameters
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*
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* @since 1.8
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*/
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public String toGenericString() {
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if (isPrimitive()) {
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return toString();
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} else {
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StringBuilder sb = new StringBuilder();
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// Class modifiers are a superset of interface modifiers
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int modifiers = getModifiers() & Modifier.classModifiers();
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if (modifiers != 0) {
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sb.append(Modifier.toString(modifiers));
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sb.append(' ');
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}
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if (isAnnotation()) {
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sb.append('@');
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}
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if (isInterface()) { // Note: all annotation types are interfaces
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sb.append("interface");
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} else {
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if (isEnum())
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sb.append("enum");
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else
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sb.append("class");
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}
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sb.append(' ');
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sb.append(getName());
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TypeVariable<?>[] typeparms = getTypeParameters();
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if (typeparms.length > 0) {
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boolean first = true;
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sb.append('<');
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for(TypeVariable<?> typeparm: typeparms) {
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if (!first)
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sb.append(',');
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sb.append(typeparm.getTypeName());
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first = false;
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}
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sb.append('>');
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}
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return sb.toString();
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}
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}
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/**
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* Returns the {@code Class} object associated with the class or
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* interface with the given string name. Invoking this method is
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* equivalent to:
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*
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* <blockquote>
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* {@code Class.forName(className, true, currentLoader)}
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* </blockquote>
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*
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* where {@code currentLoader} denotes the defining class loader of
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* the current class.
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*
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* <p> For example, the following code fragment returns the
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* runtime {@code Class} descriptor for the class named
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* {@code java.lang.Thread}:
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*
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* <blockquote>
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* {@code Class t = Class.forName("java.lang.Thread")}
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* </blockquote>
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* <p>
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* A call to {@code forName("X")} causes the class named
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* {@code X} to be initialized.
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*
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* @param className the fully qualified name of the desired class.
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* @return the {@code Class} object for the class with the
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* specified name.
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* @exception LinkageError if the linkage fails
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* @exception ExceptionInInitializerError if the initialization provoked
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* by this method fails
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* @exception ClassNotFoundException if the class cannot be located
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*/
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@CallerSensitive
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public static Class<?> forName(String className)
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throws ClassNotFoundException {
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Class<?> caller = Reflection.getCallerClass();
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return forName0(className, true, ClassLoader.getClassLoader(caller), caller);
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}
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/**
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* Returns the {@code Class} object associated with the class or
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* interface with the given string name, using the given class loader.
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* Given the fully qualified name for a class or interface (in the same
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* format returned by {@code getName}) this method attempts to
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* locate, load, and link the class or interface. The specified class
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* loader is used to load the class or interface. If the parameter
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* {@code loader} is null, the class is loaded through the bootstrap
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* class loader. The class is initialized only if the
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* {@code initialize} parameter is {@code true} and if it has
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* not been initialized earlier.
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*
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* <p> If {@code name} denotes a primitive type or void, an attempt
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* will be made to locate a user-defined class in the unnamed package whose
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* name is {@code name}. Therefore, this method cannot be used to
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* obtain any of the {@code Class} objects representing primitive
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* types or void.
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*
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* <p> If {@code name} denotes an array class, the component type of
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* the array class is loaded but not initialized.
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*
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* <p> For example, in an instance method the expression:
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*
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* <blockquote>
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* {@code Class.forName("Foo")}
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* </blockquote>
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*
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* is equivalent to:
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*
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* <blockquote>
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* {@code Class.forName("Foo", true, this.getClass().getClassLoader())}
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* </blockquote>
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*
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* Note that this method throws errors related to loading, linking or
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* initializing as specified in Sections 12.2, 12.3 and 12.4 of <em>The
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* Java Language Specification</em>.
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* Note that this method does not check whether the requested class
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* is accessible to its caller.
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*
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* <p> If the {@code loader} is {@code null}, and a security
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* manager is present, and the caller's class loader is not null, then this
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* method calls the security manager's {@code checkPermission} method
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* with a {@code RuntimePermission("getClassLoader")} permission to
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* ensure it's ok to access the bootstrap class loader.
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*
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* @param name fully qualified name of the desired class
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* @param initialize if {@code true} the class will be initialized.
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* See Section 12.4 of <em>The Java Language Specification</em>.
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* @param loader class loader from which the class must be loaded
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* @return class object representing the desired class
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*
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* @exception LinkageError if the linkage fails
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* @exception ExceptionInInitializerError if the initialization provoked
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* by this method fails
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* @exception ClassNotFoundException if the class cannot be located by
|
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* the specified class loader
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*
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* @see java.lang.Class#forName(String)
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* @see java.lang.ClassLoader
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* @since 1.2
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*/
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@CallerSensitive
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public static Class<?> forName(String name, boolean initialize,
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ClassLoader loader)
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throws ClassNotFoundException
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{
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Class<?> caller = null;
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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// Reflective call to get caller class is only needed if a security manager
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// is present. Avoid the overhead of making this call otherwise.
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caller = Reflection.getCallerClass();
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if (sun.misc.VM.isSystemDomainLoader(loader)) {
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ClassLoader ccl = ClassLoader.getClassLoader(caller);
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if (!sun.misc.VM.isSystemDomainLoader(ccl)) {
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sm.checkPermission(
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SecurityConstants.GET_CLASSLOADER_PERMISSION);
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}
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}
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}
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return forName0(name, initialize, loader, caller);
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}
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/** Called after security check for system loader access checks have been made. */
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private static native Class<?> forName0(String name, boolean initialize,
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ClassLoader loader,
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Class<?> caller)
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throws ClassNotFoundException;
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/**
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* Creates a new instance of the class represented by this {@code Class}
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* object. The class is instantiated as if by a {@code new}
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* expression with an empty argument list. The class is initialized if it
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* has not already been initialized.
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*
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* <p>Note that this method propagates any exception thrown by the
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* nullary constructor, including a checked exception. Use of
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* this method effectively bypasses the compile-time exception
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* checking that would otherwise be performed by the compiler.
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* The {@link
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* java.lang.reflect.Constructor#newInstance(java.lang.Object...)
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* Constructor.newInstance} method avoids this problem by wrapping
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* any exception thrown by the constructor in a (checked) {@link
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* java.lang.reflect.InvocationTargetException}.
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*
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* @return a newly allocated instance of the class represented by this
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* object.
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* @throws IllegalAccessException if the class or its nullary
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* constructor is not accessible.
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* @throws InstantiationException
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* if this {@code Class} represents an abstract class,
|
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* an interface, an array class, a primitive type, or void;
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* or if the class has no nullary constructor;
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* or if the instantiation fails for some other reason.
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* @throws ExceptionInInitializerError if the initialization
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* provoked by this method fails.
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* @throws SecurityException
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* If a security manager, <i>s</i>, is present and
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* the caller's class loader is not the same as or an
|
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* ancestor of the class loader for the current class and
|
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* invocation of {@link SecurityManager#checkPackageAccess
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* s.checkPackageAccess()} denies access to the package
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* of this class.
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*/
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@CallerSensitive
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public T newInstance()
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throws InstantiationException, IllegalAccessException
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{
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if (System.getSecurityManager() != null) {
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checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), false);
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}
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// NOTE: the following code may not be strictly correct under
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// the current Java memory model.
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// Constructor lookup
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if (cachedConstructor == null) {
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if (this == Class.class) {
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throw new IllegalAccessException(
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"Can not call newInstance() on the Class for java.lang.Class"
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);
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}
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try {
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Class<?>[] empty = {};
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final Constructor<T> c = getConstructor0(empty, Member.DECLARED);
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// Disable accessibility checks on the constructor
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// since we have to do the security check here anyway
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// (the stack depth is wrong for the Constructor's
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// security check to work)
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java.security.AccessController.doPrivileged(
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new java.security.PrivilegedAction<Void>() {
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public Void run() {
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c.setAccessible(true);
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return null;
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}
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});
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cachedConstructor = c;
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} catch (NoSuchMethodException e) {
|
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throw (InstantiationException)
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new InstantiationException(getName()).initCause(e);
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}
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}
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Constructor<T> tmpConstructor = cachedConstructor;
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// Security check (same as in java.lang.reflect.Constructor)
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int modifiers = tmpConstructor.getModifiers();
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if (!Reflection.quickCheckMemberAccess(this, modifiers)) {
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Class<?> caller = Reflection.getCallerClass();
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if (newInstanceCallerCache != caller) {
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Reflection.ensureMemberAccess(caller, this, null, modifiers);
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newInstanceCallerCache = caller;
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}
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}
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// Run constructor
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|
try {
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return tmpConstructor.newInstance((Object[])null);
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|
} catch (InvocationTargetException e) {
|
|
Unsafe.getUnsafe().throwException(e.getTargetException());
|
|
// Not reached
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return null;
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}
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|
}
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|
private volatile transient Constructor<T> cachedConstructor;
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|
private volatile transient Class<?> newInstanceCallerCache;
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|
|
|
|
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/**
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* Determines if the specified {@code Object} is assignment-compatible
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|
* with the object represented by this {@code Class}. This method is
|
|
* the dynamic equivalent of the Java language {@code instanceof}
|
|
* operator. The method returns {@code true} if the specified
|
|
* {@code Object} argument is non-null and can be cast to the
|
|
* reference type represented by this {@code Class} object without
|
|
* raising a {@code ClassCastException.} It returns {@code false}
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* otherwise.
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|
*
|
|
* <p> Specifically, if this {@code Class} object represents a
|
|
* declared class, this method returns {@code true} if the specified
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|
* {@code Object} argument is an instance of the represented class (or
|
|
* of any of its subclasses); it returns {@code false} otherwise. If
|
|
* this {@code Class} object represents an array class, this method
|
|
* returns {@code true} if the specified {@code Object} argument
|
|
* can be converted to an object of the array class by an identity
|
|
* conversion or by a widening reference conversion; it returns
|
|
* {@code false} otherwise. If this {@code Class} object
|
|
* represents an interface, this method returns {@code true} if the
|
|
* class or any superclass of the specified {@code Object} argument
|
|
* implements this interface; it returns {@code false} otherwise. If
|
|
* this {@code Class} object represents a primitive type, this method
|
|
* returns {@code false}.
|
|
*
|
|
* @param obj the object to check
|
|
* @return true if {@code obj} is an instance of this class
|
|
*
|
|
* @since JDK1.1
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|
*/
|
|
public native boolean isInstance(Object obj);
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|
|
|
|
|
/**
|
|
* Determines if the class or interface represented by this
|
|
* {@code Class} object is either the same as, or is a superclass or
|
|
* superinterface of, the class or interface represented by the specified
|
|
* {@code Class} parameter. It returns {@code true} if so;
|
|
* otherwise it returns {@code false}. If this {@code Class}
|
|
* object represents a primitive type, this method returns
|
|
* {@code true} if the specified {@code Class} parameter is
|
|
* exactly this {@code Class} object; otherwise it returns
|
|
* {@code false}.
|
|
*
|
|
* <p> Specifically, this method tests whether the type represented by the
|
|
* specified {@code Class} parameter can be converted to the type
|
|
* represented by this {@code Class} object via an identity conversion
|
|
* or via a widening reference conversion. See <em>The Java Language
|
|
* Specification</em>, sections 5.1.1 and 5.1.4 , for details.
|
|
*
|
|
* @param cls the {@code Class} object to be checked
|
|
* @return the {@code boolean} value indicating whether objects of the
|
|
* type {@code cls} can be assigned to objects of this class
|
|
* @exception NullPointerException if the specified Class parameter is
|
|
* null.
|
|
* @since JDK1.1
|
|
*/
|
|
public native boolean isAssignableFrom(Class<?> cls);
|
|
|
|
|
|
/**
|
|
* Determines if the specified {@code Class} object represents an
|
|
* interface type.
|
|
*
|
|
* @return {@code true} if this object represents an interface;
|
|
* {@code false} otherwise.
|
|
*/
|
|
public native boolean isInterface();
|
|
|
|
|
|
/**
|
|
* Determines if this {@code Class} object represents an array class.
|
|
*
|
|
* @return {@code true} if this object represents an array class;
|
|
* {@code false} otherwise.
|
|
* @since JDK1.1
|
|
*/
|
|
public native boolean isArray();
|
|
|
|
|
|
/**
|
|
* Determines if the specified {@code Class} object represents a
|
|
* primitive type.
|
|
*
|
|
* <p> There are nine predefined {@code Class} objects to represent
|
|
* the eight primitive types and void. These are created by the Java
|
|
* Virtual Machine, and have the same names as the primitive types that
|
|
* they represent, namely {@code boolean}, {@code byte},
|
|
* {@code char}, {@code short}, {@code int},
|
|
* {@code long}, {@code float}, and {@code double}.
|
|
*
|
|
* <p> These objects may only be accessed via the following public static
|
|
* final variables, and are the only {@code Class} objects for which
|
|
* this method returns {@code true}.
|
|
*
|
|
* @return true if and only if this class represents a primitive type
|
|
*
|
|
* @see java.lang.Boolean#TYPE
|
|
* @see java.lang.Character#TYPE
|
|
* @see java.lang.Byte#TYPE
|
|
* @see java.lang.Short#TYPE
|
|
* @see java.lang.Integer#TYPE
|
|
* @see java.lang.Long#TYPE
|
|
* @see java.lang.Float#TYPE
|
|
* @see java.lang.Double#TYPE
|
|
* @see java.lang.Void#TYPE
|
|
* @since JDK1.1
|
|
*/
|
|
public native boolean isPrimitive();
|
|
|
|
/**
|
|
* Returns true if this {@code Class} object represents an annotation
|
|
* type. Note that if this method returns true, {@link #isInterface()}
|
|
* would also return true, as all annotation types are also interfaces.
|
|
*
|
|
* @return {@code true} if this class object represents an annotation
|
|
* type; {@code false} otherwise
|
|
* @since 1.5
|
|
*/
|
|
public boolean isAnnotation() {
|
|
return (getModifiers() & ANNOTATION) != 0;
|
|
}
|
|
|
|
/**
|
|
* Returns {@code true} if this class is a synthetic class;
|
|
* returns {@code false} otherwise.
|
|
* @return {@code true} if and only if this class is a synthetic class as
|
|
* defined by the Java Language Specification.
|
|
* @jls 13.1 The Form of a Binary
|
|
* @since 1.5
|
|
*/
|
|
public boolean isSynthetic() {
|
|
return (getModifiers() & SYNTHETIC) != 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the entity (class, interface, array class,
|
|
* primitive type, or void) represented by this {@code Class} object,
|
|
* as a {@code String}.
|
|
*
|
|
* <p> If this class object represents a reference type that is not an
|
|
* array type then the binary name of the class is returned, as specified
|
|
* by
|
|
* <cite>The Java™ Language Specification</cite>.
|
|
*
|
|
* <p> If this class object represents a primitive type or void, then the
|
|
* name returned is a {@code String} equal to the Java language
|
|
* keyword corresponding to the primitive type or void.
|
|
*
|
|
* <p> If this class object represents a class of arrays, then the internal
|
|
* form of the name consists of the name of the element type preceded by
|
|
* one or more '{@code [}' characters representing the depth of the array
|
|
* nesting. The encoding of element type names is as follows:
|
|
*
|
|
* <blockquote><table summary="Element types and encodings">
|
|
* <tr><th> Element Type <th> <th> Encoding
|
|
* <tr><td> boolean <td> <td align=center> Z
|
|
* <tr><td> byte <td> <td align=center> B
|
|
* <tr><td> char <td> <td align=center> C
|
|
* <tr><td> class or interface
|
|
* <td> <td align=center> L<i>classname</i>;
|
|
* <tr><td> double <td> <td align=center> D
|
|
* <tr><td> float <td> <td align=center> F
|
|
* <tr><td> int <td> <td align=center> I
|
|
* <tr><td> long <td> <td align=center> J
|
|
* <tr><td> short <td> <td align=center> S
|
|
* </table></blockquote>
|
|
*
|
|
* <p> The class or interface name <i>classname</i> is the binary name of
|
|
* the class specified above.
|
|
*
|
|
* <p> Examples:
|
|
* <blockquote><pre>
|
|
* String.class.getName()
|
|
* returns "java.lang.String"
|
|
* byte.class.getName()
|
|
* returns "byte"
|
|
* (new Object[3]).getClass().getName()
|
|
* returns "[Ljava.lang.Object;"
|
|
* (new int[3][4][5][6][7][8][9]).getClass().getName()
|
|
* returns "[[[[[[[I"
|
|
* </pre></blockquote>
|
|
*
|
|
* @return the name of the class or interface
|
|
* represented by this object.
|
|
*/
|
|
public String getName() {
|
|
String name = this.name;
|
|
if (name == null)
|
|
this.name = name = getName0();
|
|
return name;
|
|
}
|
|
|
|
// cache the name to reduce the number of calls into the VM
|
|
private transient String name;
|
|
private native String getName0();
|
|
|
|
/**
|
|
* Returns the class loader for the class. Some implementations may use
|
|
* null to represent the bootstrap class loader. This method will return
|
|
* null in such implementations if this class was loaded by the bootstrap
|
|
* class loader.
|
|
*
|
|
* <p> If a security manager is present, and the caller's class loader is
|
|
* not null and the caller's class loader is not the same as or an ancestor of
|
|
* the class loader for the class whose class loader is requested, then
|
|
* this method calls the security manager's {@code checkPermission}
|
|
* method with a {@code RuntimePermission("getClassLoader")}
|
|
* permission to ensure it's ok to access the class loader for the class.
|
|
*
|
|
* <p>If this object
|
|
* represents a primitive type or void, null is returned.
|
|
*
|
|
* @return the class loader that loaded the class or interface
|
|
* represented by this object.
|
|
* @throws SecurityException
|
|
* if a security manager exists and its
|
|
* {@code checkPermission} method denies
|
|
* access to the class loader for the class.
|
|
* @see java.lang.ClassLoader
|
|
* @see SecurityManager#checkPermission
|
|
* @see java.lang.RuntimePermission
|
|
*/
|
|
@CallerSensitive
|
|
public ClassLoader getClassLoader() {
|
|
ClassLoader cl = getClassLoader0();
|
|
if (cl == null)
|
|
return null;
|
|
SecurityManager sm = System.getSecurityManager();
|
|
if (sm != null) {
|
|
ClassLoader.checkClassLoaderPermission(cl, Reflection.getCallerClass());
|
|
}
|
|
return cl;
|
|
}
|
|
|
|
// Package-private to allow ClassLoader access
|
|
ClassLoader getClassLoader0() { return classLoader; }
|
|
|
|
// Initialized in JVM not by private constructor
|
|
// This field is filtered from reflection access, i.e. getDeclaredField
|
|
// will throw NoSuchFieldException
|
|
private final ClassLoader classLoader;
|
|
|
|
/**
|
|
* Returns an array of {@code TypeVariable} objects that represent the
|
|
* type variables declared by the generic declaration represented by this
|
|
* {@code GenericDeclaration} object, in declaration order. Returns an
|
|
* array of length 0 if the underlying generic declaration declares no type
|
|
* variables.
|
|
*
|
|
* @return an array of {@code TypeVariable} objects that represent
|
|
* the type variables declared by this generic declaration
|
|
* @throws java.lang.reflect.GenericSignatureFormatError if the generic
|
|
* signature of this generic declaration does not conform to
|
|
* the format specified in
|
|
* <cite>The Java™ Virtual Machine Specification</cite>
|
|
* @since 1.5
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public TypeVariable<Class<T>>[] getTypeParameters() {
|
|
ClassRepository info = getGenericInfo();
|
|
if (info != null)
|
|
return (TypeVariable<Class<T>>[])info.getTypeParameters();
|
|
else
|
|
return (TypeVariable<Class<T>>[])new TypeVariable<?>[0];
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the {@code Class} representing the superclass of the entity
|
|
* (class, interface, primitive type or void) represented by this
|
|
* {@code Class}. If this {@code Class} represents either the
|
|
* {@code Object} class, an interface, a primitive type, or void, then
|
|
* null is returned. If this object represents an array class then the
|
|
* {@code Class} object representing the {@code Object} class is
|
|
* returned.
|
|
*
|
|
* @return the superclass of the class represented by this object.
|
|
*/
|
|
public native Class<? super T> getSuperclass();
|
|
|
|
|
|
/**
|
|
* Returns the {@code Type} representing the direct superclass of
|
|
* the entity (class, interface, primitive type or void) represented by
|
|
* this {@code Class}.
|
|
*
|
|
* <p>If the superclass is a parameterized type, the {@code Type}
|
|
* object returned must accurately reflect the actual type
|
|
* parameters used in the source code. The parameterized type
|
|
* representing the superclass is created if it had not been
|
|
* created before. See the declaration of {@link
|
|
* java.lang.reflect.ParameterizedType ParameterizedType} for the
|
|
* semantics of the creation process for parameterized types. If
|
|
* this {@code Class} represents either the {@code Object}
|
|
* class, an interface, a primitive type, or void, then null is
|
|
* returned. If this object represents an array class then the
|
|
* {@code Class} object representing the {@code Object} class is
|
|
* returned.
|
|
*
|
|
* @throws java.lang.reflect.GenericSignatureFormatError if the generic
|
|
* class signature does not conform to the format specified in
|
|
* <cite>The Java™ Virtual Machine Specification</cite>
|
|
* @throws TypeNotPresentException if the generic superclass
|
|
* refers to a non-existent type declaration
|
|
* @throws java.lang.reflect.MalformedParameterizedTypeException if the
|
|
* generic superclass refers to a parameterized type that cannot be
|
|
* instantiated for any reason
|
|
* @return the superclass of the class represented by this object
|
|
* @since 1.5
|
|
*/
|
|
public Type getGenericSuperclass() {
|
|
ClassRepository info = getGenericInfo();
|
|
if (info == null) {
|
|
return getSuperclass();
|
|
}
|
|
|
|
// Historical irregularity:
|
|
// Generic signature marks interfaces with superclass = Object
|
|
// but this API returns null for interfaces
|
|
if (isInterface()) {
|
|
return null;
|
|
}
|
|
|
|
return info.getSuperclass();
|
|
}
|
|
|
|
/**
|
|
* Gets the package for this class. The class loader of this class is used
|
|
* to find the package. If the class was loaded by the bootstrap class
|
|
* loader the set of packages loaded from CLASSPATH is searched to find the
|
|
* package of the class. Null is returned if no package object was created
|
|
* by the class loader of this class.
|
|
*
|
|
* <p> Packages have attributes for versions and specifications only if the
|
|
* information was defined in the manifests that accompany the classes, and
|
|
* if the class loader created the package instance with the attributes
|
|
* from the manifest.
|
|
*
|
|
* @return the package of the class, or null if no package
|
|
* information is available from the archive or codebase.
|
|
*/
|
|
public Package getPackage() {
|
|
return Package.getPackage(this);
|
|
}
|
|
|
|
|
|
/**
|
|
* Determines the interfaces implemented by the class or interface
|
|
* represented by this object.
|
|
*
|
|
* <p> If this object represents a class, the return value is an array
|
|
* containing objects representing all interfaces implemented by the
|
|
* class. The order of the interface objects in the array corresponds to
|
|
* the order of the interface names in the {@code implements} clause
|
|
* of the declaration of the class represented by this object. For
|
|
* example, given the declaration:
|
|
* <blockquote>
|
|
* {@code class Shimmer implements FloorWax, DessertTopping { ... }}
|
|
* </blockquote>
|
|
* suppose the value of {@code s} is an instance of
|
|
* {@code Shimmer}; the value of the expression:
|
|
* <blockquote>
|
|
* {@code s.getClass().getInterfaces()[0]}
|
|
* </blockquote>
|
|
* is the {@code Class} object that represents interface
|
|
* {@code FloorWax}; and the value of:
|
|
* <blockquote>
|
|
* {@code s.getClass().getInterfaces()[1]}
|
|
* </blockquote>
|
|
* is the {@code Class} object that represents interface
|
|
* {@code DessertTopping}.
|
|
*
|
|
* <p> If this object represents an interface, the array contains objects
|
|
* representing all interfaces extended by the interface. The order of the
|
|
* interface objects in the array corresponds to the order of the interface
|
|
* names in the {@code extends} clause of the declaration of the
|
|
* interface represented by this object.
|
|
*
|
|
* <p> If this object represents a class or interface that implements no
|
|
* interfaces, the method returns an array of length 0.
|
|
*
|
|
* <p> If this object represents a primitive type or void, the method
|
|
* returns an array of length 0.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, the
|
|
* interfaces {@code Cloneable} and {@code java.io.Serializable} are
|
|
* returned in that order.
|
|
*
|
|
* @return an array of interfaces implemented by this class.
|
|
*/
|
|
public Class<?>[] getInterfaces() {
|
|
ReflectionData<T> rd = reflectionData();
|
|
if (rd == null) {
|
|
// no cloning required
|
|
return getInterfaces0();
|
|
} else {
|
|
Class<?>[] interfaces = rd.interfaces;
|
|
if (interfaces == null) {
|
|
interfaces = getInterfaces0();
|
|
rd.interfaces = interfaces;
|
|
}
|
|
// defensively copy before handing over to user code
|
|
return interfaces.clone();
|
|
}
|
|
}
|
|
|
|
private native Class<?>[] getInterfaces0();
|
|
|
|
/**
|
|
* Returns the {@code Type}s representing the interfaces
|
|
* directly implemented by the class or interface represented by
|
|
* this object.
|
|
*
|
|
* <p>If a superinterface is a parameterized type, the
|
|
* {@code Type} object returned for it must accurately reflect
|
|
* the actual type parameters used in the source code. The
|
|
* parameterized type representing each superinterface is created
|
|
* if it had not been created before. See the declaration of
|
|
* {@link java.lang.reflect.ParameterizedType ParameterizedType}
|
|
* for the semantics of the creation process for parameterized
|
|
* types.
|
|
*
|
|
* <p> If this object represents a class, the return value is an
|
|
* array containing objects representing all interfaces
|
|
* implemented by the class. The order of the interface objects in
|
|
* the array corresponds to the order of the interface names in
|
|
* the {@code implements} clause of the declaration of the class
|
|
* represented by this object. In the case of an array class, the
|
|
* interfaces {@code Cloneable} and {@code Serializable} are
|
|
* returned in that order.
|
|
*
|
|
* <p>If this object represents an interface, the array contains
|
|
* objects representing all interfaces directly extended by the
|
|
* interface. The order of the interface objects in the array
|
|
* corresponds to the order of the interface names in the
|
|
* {@code extends} clause of the declaration of the interface
|
|
* represented by this object.
|
|
*
|
|
* <p>If this object represents a class or interface that
|
|
* implements no interfaces, the method returns an array of length
|
|
* 0.
|
|
*
|
|
* <p>If this object represents a primitive type or void, the
|
|
* method returns an array of length 0.
|
|
*
|
|
* @throws java.lang.reflect.GenericSignatureFormatError
|
|
* if the generic class signature does not conform to the format
|
|
* specified in
|
|
* <cite>The Java™ Virtual Machine Specification</cite>
|
|
* @throws TypeNotPresentException if any of the generic
|
|
* superinterfaces refers to a non-existent type declaration
|
|
* @throws java.lang.reflect.MalformedParameterizedTypeException
|
|
* if any of the generic superinterfaces refer to a parameterized
|
|
* type that cannot be instantiated for any reason
|
|
* @return an array of interfaces implemented by this class
|
|
* @since 1.5
|
|
*/
|
|
public Type[] getGenericInterfaces() {
|
|
ClassRepository info = getGenericInfo();
|
|
return (info == null) ? getInterfaces() : info.getSuperInterfaces();
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the {@code Class} representing the component type of an
|
|
* array. If this class does not represent an array class this method
|
|
* returns null.
|
|
*
|
|
* @return the {@code Class} representing the component type of this
|
|
* class if this class is an array
|
|
* @see java.lang.reflect.Array
|
|
* @since JDK1.1
|
|
*/
|
|
public native Class<?> getComponentType();
|
|
|
|
|
|
/**
|
|
* Returns the Java language modifiers for this class or interface, encoded
|
|
* in an integer. The modifiers consist of the Java Virtual Machine's
|
|
* constants for {@code public}, {@code protected},
|
|
* {@code private}, {@code final}, {@code static},
|
|
* {@code abstract} and {@code interface}; they should be decoded
|
|
* using the methods of class {@code Modifier}.
|
|
*
|
|
* <p> If the underlying class is an array class, then its
|
|
* {@code public}, {@code private} and {@code protected}
|
|
* modifiers are the same as those of its component type. If this
|
|
* {@code Class} represents a primitive type or void, its
|
|
* {@code public} modifier is always {@code true}, and its
|
|
* {@code protected} and {@code private} modifiers are always
|
|
* {@code false}. If this object represents an array class, a
|
|
* primitive type or void, then its {@code final} modifier is always
|
|
* {@code true} and its interface modifier is always
|
|
* {@code false}. The values of its other modifiers are not determined
|
|
* by this specification.
|
|
*
|
|
* <p> The modifier encodings are defined in <em>The Java Virtual Machine
|
|
* Specification</em>, table 4.1.
|
|
*
|
|
* @return the {@code int} representing the modifiers for this class
|
|
* @see java.lang.reflect.Modifier
|
|
* @since JDK1.1
|
|
*/
|
|
public native int getModifiers();
|
|
|
|
|
|
/**
|
|
* Gets the signers of this class.
|
|
*
|
|
* @return the signers of this class, or null if there are no signers. In
|
|
* particular, this method returns null if this object represents
|
|
* a primitive type or void.
|
|
* @since JDK1.1
|
|
*/
|
|
public native Object[] getSigners();
|
|
|
|
|
|
/**
|
|
* Set the signers of this class.
|
|
*/
|
|
native void setSigners(Object[] signers);
|
|
|
|
|
|
/**
|
|
* If this {@code Class} object represents a local or anonymous
|
|
* class within a method, returns a {@link
|
|
* java.lang.reflect.Method Method} object representing the
|
|
* immediately enclosing method of the underlying class. Returns
|
|
* {@code null} otherwise.
|
|
*
|
|
* In particular, this method returns {@code null} if the underlying
|
|
* class is a local or anonymous class immediately enclosed by a type
|
|
* declaration, instance initializer or static initializer.
|
|
*
|
|
* @return the immediately enclosing method of the underlying class, if
|
|
* that class is a local or anonymous class; otherwise {@code null}.
|
|
*
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of the enclosing class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the methods within the enclosing class
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the enclosing class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of the enclosing class
|
|
*
|
|
* </ul>
|
|
* @since 1.5
|
|
*/
|
|
@CallerSensitive
|
|
public Method getEnclosingMethod() throws SecurityException {
|
|
EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
|
|
|
|
if (enclosingInfo == null)
|
|
return null;
|
|
else {
|
|
if (!enclosingInfo.isMethod())
|
|
return null;
|
|
|
|
MethodRepository typeInfo = MethodRepository.make(enclosingInfo.getDescriptor(),
|
|
getFactory());
|
|
Class<?> returnType = toClass(typeInfo.getReturnType());
|
|
Type [] parameterTypes = typeInfo.getParameterTypes();
|
|
Class<?>[] parameterClasses = new Class<?>[parameterTypes.length];
|
|
|
|
// Convert Types to Classes; returned types *should*
|
|
// be class objects since the methodDescriptor's used
|
|
// don't have generics information
|
|
for(int i = 0; i < parameterClasses.length; i++)
|
|
parameterClasses[i] = toClass(parameterTypes[i]);
|
|
|
|
// Perform access check
|
|
Class<?> enclosingCandidate = enclosingInfo.getEnclosingClass();
|
|
enclosingCandidate.checkMemberAccess(Member.DECLARED,
|
|
Reflection.getCallerClass(), true);
|
|
/*
|
|
* Loop over all declared methods; match method name,
|
|
* number of and type of parameters, *and* return
|
|
* type. Matching return type is also necessary
|
|
* because of covariant returns, etc.
|
|
*/
|
|
for(Method m: enclosingCandidate.getDeclaredMethods()) {
|
|
if (m.getName().equals(enclosingInfo.getName()) ) {
|
|
Class<?>[] candidateParamClasses = m.getParameterTypes();
|
|
if (candidateParamClasses.length == parameterClasses.length) {
|
|
boolean matches = true;
|
|
for(int i = 0; i < candidateParamClasses.length; i++) {
|
|
if (!candidateParamClasses[i].equals(parameterClasses[i])) {
|
|
matches = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (matches) { // finally, check return type
|
|
if (m.getReturnType().equals(returnType) )
|
|
return m;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
throw new InternalError("Enclosing method not found");
|
|
}
|
|
}
|
|
|
|
private native Object[] getEnclosingMethod0();
|
|
|
|
private EnclosingMethodInfo getEnclosingMethodInfo() {
|
|
Object[] enclosingInfo = getEnclosingMethod0();
|
|
if (enclosingInfo == null)
|
|
return null;
|
|
else {
|
|
return new EnclosingMethodInfo(enclosingInfo);
|
|
}
|
|
}
|
|
|
|
private final static class EnclosingMethodInfo {
|
|
private Class<?> enclosingClass;
|
|
private String name;
|
|
private String descriptor;
|
|
|
|
private EnclosingMethodInfo(Object[] enclosingInfo) {
|
|
if (enclosingInfo.length != 3)
|
|
throw new InternalError("Malformed enclosing method information");
|
|
try {
|
|
// The array is expected to have three elements:
|
|
|
|
// the immediately enclosing class
|
|
enclosingClass = (Class<?>) enclosingInfo[0];
|
|
assert(enclosingClass != null);
|
|
|
|
// the immediately enclosing method or constructor's
|
|
// name (can be null).
|
|
name = (String) enclosingInfo[1];
|
|
|
|
// the immediately enclosing method or constructor's
|
|
// descriptor (null iff name is).
|
|
descriptor = (String) enclosingInfo[2];
|
|
assert((name != null && descriptor != null) || name == descriptor);
|
|
} catch (ClassCastException cce) {
|
|
throw new InternalError("Invalid type in enclosing method information", cce);
|
|
}
|
|
}
|
|
|
|
boolean isPartial() {
|
|
return enclosingClass == null || name == null || descriptor == null;
|
|
}
|
|
|
|
boolean isConstructor() { return !isPartial() && "<init>".equals(name); }
|
|
|
|
boolean isMethod() { return !isPartial() && !isConstructor() && !"<clinit>".equals(name); }
|
|
|
|
Class<?> getEnclosingClass() { return enclosingClass; }
|
|
|
|
String getName() { return name; }
|
|
|
|
String getDescriptor() { return descriptor; }
|
|
|
|
}
|
|
|
|
private static Class<?> toClass(Type o) {
|
|
if (o instanceof GenericArrayType)
|
|
return Array.newInstance(toClass(((GenericArrayType)o).getGenericComponentType()),
|
|
0)
|
|
.getClass();
|
|
return (Class<?>)o;
|
|
}
|
|
|
|
/**
|
|
* If this {@code Class} object represents a local or anonymous
|
|
* class within a constructor, returns a {@link
|
|
* java.lang.reflect.Constructor Constructor} object representing
|
|
* the immediately enclosing constructor of the underlying
|
|
* class. Returns {@code null} otherwise. In particular, this
|
|
* method returns {@code null} if the underlying class is a local
|
|
* or anonymous class immediately enclosed by a type declaration,
|
|
* instance initializer or static initializer.
|
|
*
|
|
* @return the immediately enclosing constructor of the underlying class, if
|
|
* that class is a local or anonymous class; otherwise {@code null}.
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of the enclosing class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the constructors within the enclosing class
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the enclosing class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of the enclosing class
|
|
*
|
|
* </ul>
|
|
* @since 1.5
|
|
*/
|
|
@CallerSensitive
|
|
public Constructor<?> getEnclosingConstructor() throws SecurityException {
|
|
EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
|
|
|
|
if (enclosingInfo == null)
|
|
return null;
|
|
else {
|
|
if (!enclosingInfo.isConstructor())
|
|
return null;
|
|
|
|
ConstructorRepository typeInfo = ConstructorRepository.make(enclosingInfo.getDescriptor(),
|
|
getFactory());
|
|
Type [] parameterTypes = typeInfo.getParameterTypes();
|
|
Class<?>[] parameterClasses = new Class<?>[parameterTypes.length];
|
|
|
|
// Convert Types to Classes; returned types *should*
|
|
// be class objects since the methodDescriptor's used
|
|
// don't have generics information
|
|
for(int i = 0; i < parameterClasses.length; i++)
|
|
parameterClasses[i] = toClass(parameterTypes[i]);
|
|
|
|
// Perform access check
|
|
Class<?> enclosingCandidate = enclosingInfo.getEnclosingClass();
|
|
enclosingCandidate.checkMemberAccess(Member.DECLARED,
|
|
Reflection.getCallerClass(), true);
|
|
/*
|
|
* Loop over all declared constructors; match number
|
|
* of and type of parameters.
|
|
*/
|
|
for(Constructor<?> c: enclosingCandidate.getDeclaredConstructors()) {
|
|
Class<?>[] candidateParamClasses = c.getParameterTypes();
|
|
if (candidateParamClasses.length == parameterClasses.length) {
|
|
boolean matches = true;
|
|
for(int i = 0; i < candidateParamClasses.length; i++) {
|
|
if (!candidateParamClasses[i].equals(parameterClasses[i])) {
|
|
matches = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (matches)
|
|
return c;
|
|
}
|
|
}
|
|
|
|
throw new InternalError("Enclosing constructor not found");
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* If the class or interface represented by this {@code Class} object
|
|
* is a member of another class, returns the {@code Class} object
|
|
* representing the class in which it was declared. This method returns
|
|
* null if this class or interface is not a member of any other class. If
|
|
* this {@code Class} object represents an array class, a primitive
|
|
* type, or void,then this method returns null.
|
|
*
|
|
* @return the declaring class for this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and the caller's
|
|
* class loader is not the same as or an ancestor of the class
|
|
* loader for the declaring class and invocation of {@link
|
|
* SecurityManager#checkPackageAccess s.checkPackageAccess()}
|
|
* denies access to the package of the declaring class
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Class<?> getDeclaringClass() throws SecurityException {
|
|
final Class<?> candidate = getDeclaringClass0();
|
|
|
|
if (candidate != null)
|
|
candidate.checkPackageAccess(
|
|
ClassLoader.getClassLoader(Reflection.getCallerClass()), true);
|
|
return candidate;
|
|
}
|
|
|
|
private native Class<?> getDeclaringClass0();
|
|
|
|
|
|
/**
|
|
* Returns the immediately enclosing class of the underlying
|
|
* class. If the underlying class is a top level class this
|
|
* method returns {@code null}.
|
|
* @return the immediately enclosing class of the underlying class
|
|
* @exception SecurityException
|
|
* If a security manager, <i>s</i>, is present and the caller's
|
|
* class loader is not the same as or an ancestor of the class
|
|
* loader for the enclosing class and invocation of {@link
|
|
* SecurityManager#checkPackageAccess s.checkPackageAccess()}
|
|
* denies access to the package of the enclosing class
|
|
* @since 1.5
|
|
*/
|
|
@CallerSensitive
|
|
public Class<?> getEnclosingClass() throws SecurityException {
|
|
// There are five kinds of classes (or interfaces):
|
|
// a) Top level classes
|
|
// b) Nested classes (static member classes)
|
|
// c) Inner classes (non-static member classes)
|
|
// d) Local classes (named classes declared within a method)
|
|
// e) Anonymous classes
|
|
|
|
|
|
// JVM Spec 4.8.6: A class must have an EnclosingMethod
|
|
// attribute if and only if it is a local class or an
|
|
// anonymous class.
|
|
EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
|
|
Class<?> enclosingCandidate;
|
|
|
|
if (enclosingInfo == null) {
|
|
// This is a top level or a nested class or an inner class (a, b, or c)
|
|
enclosingCandidate = getDeclaringClass();
|
|
} else {
|
|
Class<?> enclosingClass = enclosingInfo.getEnclosingClass();
|
|
// This is a local class or an anonymous class (d or e)
|
|
if (enclosingClass == this || enclosingClass == null)
|
|
throw new InternalError("Malformed enclosing method information");
|
|
else
|
|
enclosingCandidate = enclosingClass;
|
|
}
|
|
|
|
if (enclosingCandidate != null)
|
|
enclosingCandidate.checkPackageAccess(
|
|
ClassLoader.getClassLoader(Reflection.getCallerClass()), true);
|
|
return enclosingCandidate;
|
|
}
|
|
|
|
/**
|
|
* Returns the simple name of the underlying class as given in the
|
|
* source code. Returns an empty string if the underlying class is
|
|
* anonymous.
|
|
*
|
|
* <p>The simple name of an array is the simple name of the
|
|
* component type with "[]" appended. In particular the simple
|
|
* name of an array whose component type is anonymous is "[]".
|
|
*
|
|
* @return the simple name of the underlying class
|
|
* @since 1.5
|
|
*/
|
|
public String getSimpleName() {
|
|
if (isArray())
|
|
return getComponentType().getSimpleName()+"[]";
|
|
|
|
String simpleName = getSimpleBinaryName();
|
|
if (simpleName == null) { // top level class
|
|
simpleName = getName();
|
|
return simpleName.substring(simpleName.lastIndexOf(".")+1); // strip the package name
|
|
}
|
|
// According to JLS3 "Binary Compatibility" (13.1) the binary
|
|
// name of non-package classes (not top level) is the binary
|
|
// name of the immediately enclosing class followed by a '$' followed by:
|
|
// (for nested and inner classes): the simple name.
|
|
// (for local classes): 1 or more digits followed by the simple name.
|
|
// (for anonymous classes): 1 or more digits.
|
|
|
|
// Since getSimpleBinaryName() will strip the binary name of
|
|
// the immediatly enclosing class, we are now looking at a
|
|
// string that matches the regular expression "\$[0-9]*"
|
|
// followed by a simple name (considering the simple of an
|
|
// anonymous class to be the empty string).
|
|
|
|
// Remove leading "\$[0-9]*" from the name
|
|
int length = simpleName.length();
|
|
if (length < 1 || simpleName.charAt(0) != '$')
|
|
throw new InternalError("Malformed class name");
|
|
int index = 1;
|
|
while (index < length && isAsciiDigit(simpleName.charAt(index)))
|
|
index++;
|
|
// Eventually, this is the empty string iff this is an anonymous class
|
|
return simpleName.substring(index);
|
|
}
|
|
|
|
/**
|
|
* Return an informative string for the name of this type.
|
|
*
|
|
* @return an informative string for the name of this type
|
|
* @since 1.8
|
|
*/
|
|
public String getTypeName() {
|
|
if (isArray()) {
|
|
try {
|
|
Class<?> cl = this;
|
|
int dimensions = 0;
|
|
while (cl.isArray()) {
|
|
dimensions++;
|
|
cl = cl.getComponentType();
|
|
}
|
|
StringBuilder sb = new StringBuilder();
|
|
sb.append(cl.getName());
|
|
for (int i = 0; i < dimensions; i++) {
|
|
sb.append("[]");
|
|
}
|
|
return sb.toString();
|
|
} catch (Throwable e) { /*FALLTHRU*/ }
|
|
}
|
|
return getName();
|
|
}
|
|
|
|
/**
|
|
* Character.isDigit answers {@code true} to some non-ascii
|
|
* digits. This one does not.
|
|
*/
|
|
private static boolean isAsciiDigit(char c) {
|
|
return '0' <= c && c <= '9';
|
|
}
|
|
|
|
/**
|
|
* Returns the canonical name of the underlying class as
|
|
* defined by the Java Language Specification. Returns null if
|
|
* the underlying class does not have a canonical name (i.e., if
|
|
* it is a local or anonymous class or an array whose component
|
|
* type does not have a canonical name).
|
|
* @return the canonical name of the underlying class if it exists, and
|
|
* {@code null} otherwise.
|
|
* @since 1.5
|
|
*/
|
|
public String getCanonicalName() {
|
|
if (isArray()) {
|
|
String canonicalName = getComponentType().getCanonicalName();
|
|
if (canonicalName != null)
|
|
return canonicalName + "[]";
|
|
else
|
|
return null;
|
|
}
|
|
if (isLocalOrAnonymousClass())
|
|
return null;
|
|
Class<?> enclosingClass = getEnclosingClass();
|
|
if (enclosingClass == null) { // top level class
|
|
return getName();
|
|
} else {
|
|
String enclosingName = enclosingClass.getCanonicalName();
|
|
if (enclosingName == null)
|
|
return null;
|
|
return enclosingName + "." + getSimpleName();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns {@code true} if and only if the underlying class
|
|
* is an anonymous class.
|
|
*
|
|
* @return {@code true} if and only if this class is an anonymous class.
|
|
* @since 1.5
|
|
*/
|
|
public boolean isAnonymousClass() {
|
|
return "".equals(getSimpleName());
|
|
}
|
|
|
|
/**
|
|
* Returns {@code true} if and only if the underlying class
|
|
* is a local class.
|
|
*
|
|
* @return {@code true} if and only if this class is a local class.
|
|
* @since 1.5
|
|
*/
|
|
public boolean isLocalClass() {
|
|
return isLocalOrAnonymousClass() && !isAnonymousClass();
|
|
}
|
|
|
|
/**
|
|
* Returns {@code true} if and only if the underlying class
|
|
* is a member class.
|
|
*
|
|
* @return {@code true} if and only if this class is a member class.
|
|
* @since 1.5
|
|
*/
|
|
public boolean isMemberClass() {
|
|
return getSimpleBinaryName() != null && !isLocalOrAnonymousClass();
|
|
}
|
|
|
|
/**
|
|
* Returns the "simple binary name" of the underlying class, i.e.,
|
|
* the binary name without the leading enclosing class name.
|
|
* Returns {@code null} if the underlying class is a top level
|
|
* class.
|
|
*/
|
|
private String getSimpleBinaryName() {
|
|
Class<?> enclosingClass = getEnclosingClass();
|
|
if (enclosingClass == null) // top level class
|
|
return null;
|
|
// Otherwise, strip the enclosing class' name
|
|
try {
|
|
return getName().substring(enclosingClass.getName().length());
|
|
} catch (IndexOutOfBoundsException ex) {
|
|
throw new InternalError("Malformed class name", ex);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns {@code true} if this is a local class or an anonymous
|
|
* class. Returns {@code false} otherwise.
|
|
*/
|
|
private boolean isLocalOrAnonymousClass() {
|
|
// JVM Spec 4.8.6: A class must have an EnclosingMethod
|
|
// attribute if and only if it is a local class or an
|
|
// anonymous class.
|
|
return getEnclosingMethodInfo() != null;
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing {@code Class} objects representing all
|
|
* the public classes and interfaces that are members of the class
|
|
* represented by this {@code Class} object. This includes public
|
|
* class and interface members inherited from superclasses and public class
|
|
* and interface members declared by the class. This method returns an
|
|
* array of length 0 if this {@code Class} object has no public member
|
|
* classes or interfaces. This method also returns an array of length 0 if
|
|
* this {@code Class} object represents a primitive type, an array
|
|
* class, or void.
|
|
*
|
|
* @return the array of {@code Class} objects representing the public
|
|
* members of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Class<?>[] getClasses() {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), false);
|
|
|
|
// Privileged so this implementation can look at DECLARED classes,
|
|
// something the caller might not have privilege to do. The code here
|
|
// is allowed to look at DECLARED classes because (1) it does not hand
|
|
// out anything other than public members and (2) public member access
|
|
// has already been ok'd by the SecurityManager.
|
|
|
|
return java.security.AccessController.doPrivileged(
|
|
new java.security.PrivilegedAction<Class<?>[]>() {
|
|
public Class<?>[] run() {
|
|
List<Class<?>> list = new ArrayList<>();
|
|
Class<?> currentClass = Class.this;
|
|
while (currentClass != null) {
|
|
Class<?>[] members = currentClass.getDeclaredClasses();
|
|
for (int i = 0; i < members.length; i++) {
|
|
if (Modifier.isPublic(members[i].getModifiers())) {
|
|
list.add(members[i]);
|
|
}
|
|
}
|
|
currentClass = currentClass.getSuperclass();
|
|
}
|
|
return list.toArray(new Class<?>[0]);
|
|
}
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns an array containing {@code Field} objects reflecting all
|
|
* the accessible public fields of the class or interface represented by
|
|
* this {@code Class} object.
|
|
*
|
|
* <p> If this {@code Class} object represents a class or interface with no
|
|
* no accessible public fields, then this method returns an array of length
|
|
* 0.
|
|
*
|
|
* <p> If this {@code Class} object represents a class, then this method
|
|
* returns the public fields of the class and of all its superclasses.
|
|
*
|
|
* <p> If this {@code Class} object represents an interface, then this
|
|
* method returns the fields of the interface and of all its
|
|
* superinterfaces.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, a primitive
|
|
* type, or void, then this method returns an array of length 0.
|
|
*
|
|
* <p> The elements in the returned array are not sorted and are not in any
|
|
* particular order.
|
|
*
|
|
* @return the array of {@code Field} objects representing the
|
|
* public fields
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @since JDK1.1
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.3 Field Declarations
|
|
*/
|
|
@CallerSensitive
|
|
public Field[] getFields() throws SecurityException {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
|
|
return copyFields(privateGetPublicFields(null));
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns an array containing {@code Method} objects reflecting all the
|
|
* public methods of the class or interface represented by this {@code
|
|
* Class} object, including those declared by the class or interface and
|
|
* those inherited from superclasses and superinterfaces.
|
|
*
|
|
* <p> If this {@code Class} object represents a type that has multiple
|
|
* public methods with the same name and parameter types, but different
|
|
* return types, then the returned array has a {@code Method} object for
|
|
* each such method.
|
|
*
|
|
* <p> If this {@code Class} object represents a type with a class
|
|
* initialization method {@code <clinit>}, then the returned array does
|
|
* <em>not</em> have a corresponding {@code Method} object.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, then the
|
|
* returned array has a {@code Method} object for each of the public
|
|
* methods inherited by the array type from {@code Object}. It does not
|
|
* contain a {@code Method} object for {@code clone()}.
|
|
*
|
|
* <p> If this {@code Class} object represents an interface then the
|
|
* returned array does not contain any implicitly declared methods from
|
|
* {@code Object}. Therefore, if no methods are explicitly declared in
|
|
* this interface or any of its superinterfaces then the returned array
|
|
* has length 0. (Note that a {@code Class} object which represents a class
|
|
* always has public methods, inherited from {@code Object}.)
|
|
*
|
|
* <p> If this {@code Class} object represents a primitive type or void,
|
|
* then the returned array has length 0.
|
|
*
|
|
* <p> Static methods declared in superinterfaces of the class or interface
|
|
* represented by this {@code Class} object are not considered members of
|
|
* the class or interface.
|
|
*
|
|
* <p> The elements in the returned array are not sorted and are not in any
|
|
* particular order.
|
|
*
|
|
* @return the array of {@code Method} objects representing the
|
|
* public methods of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.4 Method Declarations
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Method[] getMethods() throws SecurityException {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
|
|
return copyMethods(privateGetPublicMethods());
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns an array containing {@code Constructor} objects reflecting
|
|
* all the public constructors of the class represented by this
|
|
* {@code Class} object. An array of length 0 is returned if the
|
|
* class has no public constructors, or if the class is an array class, or
|
|
* if the class reflects a primitive type or void.
|
|
*
|
|
* Note that while this method returns an array of {@code
|
|
* Constructor<T>} objects (that is an array of constructors from
|
|
* this class), the return type of this method is {@code
|
|
* Constructor<?>[]} and <em>not</em> {@code Constructor<T>[]} as
|
|
* might be expected. This less informative return type is
|
|
* necessary since after being returned from this method, the
|
|
* array could be modified to hold {@code Constructor} objects for
|
|
* different classes, which would violate the type guarantees of
|
|
* {@code Constructor<T>[]}.
|
|
*
|
|
* @return the array of {@code Constructor} objects representing the
|
|
* public constructors of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Constructor<?>[] getConstructors() throws SecurityException {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
|
|
return copyConstructors(privateGetDeclaredConstructors(true));
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a {@code Field} object that reflects the specified public member
|
|
* field of the class or interface represented by this {@code Class}
|
|
* object. The {@code name} parameter is a {@code String} specifying the
|
|
* simple name of the desired field.
|
|
*
|
|
* <p> The field to be reflected is determined by the algorithm that
|
|
* follows. Let C be the class or interface represented by this object:
|
|
*
|
|
* <OL>
|
|
* <LI> If C declares a public field with the name specified, that is the
|
|
* field to be reflected.</LI>
|
|
* <LI> If no field was found in step 1 above, this algorithm is applied
|
|
* recursively to each direct superinterface of C. The direct
|
|
* superinterfaces are searched in the order they were declared.</LI>
|
|
* <LI> If no field was found in steps 1 and 2 above, and C has a
|
|
* superclass S, then this algorithm is invoked recursively upon S.
|
|
* If C has no superclass, then a {@code NoSuchFieldException}
|
|
* is thrown.</LI>
|
|
* </OL>
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, then this
|
|
* method does not find the {@code length} field of the array type.
|
|
*
|
|
* @param name the field name
|
|
* @return the {@code Field} object of this class specified by
|
|
* {@code name}
|
|
* @throws NoSuchFieldException if a field with the specified name is
|
|
* not found.
|
|
* @throws NullPointerException if {@code name} is {@code null}
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @since JDK1.1
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.3 Field Declarations
|
|
*/
|
|
@CallerSensitive
|
|
public Field getField(String name)
|
|
throws NoSuchFieldException, SecurityException {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
|
|
Field field = getField0(name);
|
|
if (field == null) {
|
|
throw new NoSuchFieldException(name);
|
|
}
|
|
return field;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a {@code Method} object that reflects the specified public
|
|
* member method of the class or interface represented by this
|
|
* {@code Class} object. The {@code name} parameter is a
|
|
* {@code String} specifying the simple name of the desired method. The
|
|
* {@code parameterTypes} parameter is an array of {@code Class}
|
|
* objects that identify the method's formal parameter types, in declared
|
|
* order. If {@code parameterTypes} is {@code null}, it is
|
|
* treated as if it were an empty array.
|
|
*
|
|
* <p> If the {@code name} is "{@code <init>}" or "{@code <clinit>}" a
|
|
* {@code NoSuchMethodException} is raised. Otherwise, the method to
|
|
* be reflected is determined by the algorithm that follows. Let C be the
|
|
* class or interface represented by this object:
|
|
* <OL>
|
|
* <LI> C is searched for a <I>matching method</I>, as defined below. If a
|
|
* matching method is found, it is reflected.</LI>
|
|
* <LI> If no matching method is found by step 1 then:
|
|
* <OL TYPE="a">
|
|
* <LI> If C is a class other than {@code Object}, then this algorithm is
|
|
* invoked recursively on the superclass of C.</LI>
|
|
* <LI> If C is the class {@code Object}, or if C is an interface, then
|
|
* the superinterfaces of C (if any) are searched for a matching
|
|
* method. If any such method is found, it is reflected.</LI>
|
|
* </OL></LI>
|
|
* </OL>
|
|
*
|
|
* <p> To find a matching method in a class or interface C: If C
|
|
* declares exactly one public method with the specified name and exactly
|
|
* the same formal parameter types, that is the method reflected. If more
|
|
* than one such method is found in C, and one of these methods has a
|
|
* return type that is more specific than any of the others, that method is
|
|
* reflected; otherwise one of the methods is chosen arbitrarily.
|
|
*
|
|
* <p>Note that there may be more than one matching method in a
|
|
* class because while the Java language forbids a class to
|
|
* declare multiple methods with the same signature but different
|
|
* return types, the Java virtual machine does not. This
|
|
* increased flexibility in the virtual machine can be used to
|
|
* implement various language features. For example, covariant
|
|
* returns can be implemented with {@linkplain
|
|
* java.lang.reflect.Method#isBridge bridge methods}; the bridge
|
|
* method and the method being overridden would have the same
|
|
* signature but different return types.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, then this
|
|
* method does not find the {@code clone()} method.
|
|
*
|
|
* <p> Static methods declared in superinterfaces of the class or interface
|
|
* represented by this {@code Class} object are not considered members of
|
|
* the class or interface.
|
|
*
|
|
* @param name the name of the method
|
|
* @param parameterTypes the list of parameters
|
|
* @return the {@code Method} object that matches the specified
|
|
* {@code name} and {@code parameterTypes}
|
|
* @throws NoSuchMethodException if a matching method is not found
|
|
* or if the name is "<init>"or "<clinit>".
|
|
* @throws NullPointerException if {@code name} is {@code null}
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.4 Method Declarations
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Method getMethod(String name, Class<?>... parameterTypes)
|
|
throws NoSuchMethodException, SecurityException {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
|
|
Method method = getMethod0(name, parameterTypes, true);
|
|
if (method == null) {
|
|
throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
|
|
}
|
|
return method;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a {@code Constructor} object that reflects the specified
|
|
* public constructor of the class represented by this {@code Class}
|
|
* object. The {@code parameterTypes} parameter is an array of
|
|
* {@code Class} objects that identify the constructor's formal
|
|
* parameter types, in declared order.
|
|
*
|
|
* If this {@code Class} object represents an inner class
|
|
* declared in a non-static context, the formal parameter types
|
|
* include the explicit enclosing instance as the first parameter.
|
|
*
|
|
* <p> The constructor to reflect is the public constructor of the class
|
|
* represented by this {@code Class} object whose formal parameter
|
|
* types match those specified by {@code parameterTypes}.
|
|
*
|
|
* @param parameterTypes the parameter array
|
|
* @return the {@code Constructor} object of the public constructor that
|
|
* matches the specified {@code parameterTypes}
|
|
* @throws NoSuchMethodException if a matching method is not found.
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and
|
|
* the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class.
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Constructor<T> getConstructor(Class<?>... parameterTypes)
|
|
throws NoSuchMethodException, SecurityException {
|
|
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
|
|
return getConstructor0(parameterTypes, Member.PUBLIC);
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns an array of {@code Class} objects reflecting all the
|
|
* classes and interfaces declared as members of the class represented by
|
|
* this {@code Class} object. This includes public, protected, default
|
|
* (package) access, and private classes and interfaces declared by the
|
|
* class, but excludes inherited classes and interfaces. This method
|
|
* returns an array of length 0 if the class declares no classes or
|
|
* interfaces as members, or if this {@code Class} object represents a
|
|
* primitive type, an array class, or void.
|
|
*
|
|
* @return the array of {@code Class} objects representing all the
|
|
* declared members of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared classes within this class
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Class<?>[] getDeclaredClasses() throws SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), false);
|
|
return getDeclaredClasses0();
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns an array of {@code Field} objects reflecting all the fields
|
|
* declared by the class or interface represented by this
|
|
* {@code Class} object. This includes public, protected, default
|
|
* (package) access, and private fields, but excludes inherited fields.
|
|
*
|
|
* <p> If this {@code Class} object represents a class or interface with no
|
|
* declared fields, then this method returns an array of length 0.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, a primitive
|
|
* type, or void, then this method returns an array of length 0.
|
|
*
|
|
* <p> The elements in the returned array are not sorted and are not in any
|
|
* particular order.
|
|
*
|
|
* @return the array of {@code Field} objects representing all the
|
|
* declared fields of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared fields within this class
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @since JDK1.1
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.3 Field Declarations
|
|
*/
|
|
@CallerSensitive
|
|
public Field[] getDeclaredFields() throws SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
|
|
return copyFields(privateGetDeclaredFields(false));
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* Returns an array containing {@code Method} objects reflecting all the
|
|
* declared methods of the class or interface represented by this {@code
|
|
* Class} object, including public, protected, default (package)
|
|
* access, and private methods, but excluding inherited methods.
|
|
*
|
|
* <p> If this {@code Class} object represents a type that has multiple
|
|
* declared methods with the same name and parameter types, but different
|
|
* return types, then the returned array has a {@code Method} object for
|
|
* each such method.
|
|
*
|
|
* <p> If this {@code Class} object represents a type that has a class
|
|
* initialization method {@code <clinit>}, then the returned array does
|
|
* <em>not</em> have a corresponding {@code Method} object.
|
|
*
|
|
* <p> If this {@code Class} object represents a class or interface with no
|
|
* declared methods, then the returned array has length 0.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, a primitive
|
|
* type, or void, then the returned array has length 0.
|
|
*
|
|
* <p> The elements in the returned array are not sorted and are not in any
|
|
* particular order.
|
|
*
|
|
* @return the array of {@code Method} objects representing all the
|
|
* declared methods of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared methods within this class
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.4 Method Declarations
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Method[] getDeclaredMethods() throws SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
|
|
return copyMethods(privateGetDeclaredMethods(false));
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns an array of {@code Constructor} objects reflecting all the
|
|
* constructors declared by the class represented by this
|
|
* {@code Class} object. These are public, protected, default
|
|
* (package) access, and private constructors. The elements in the array
|
|
* returned are not sorted and are not in any particular order. If the
|
|
* class has a default constructor, it is included in the returned array.
|
|
* This method returns an array of length 0 if this {@code Class}
|
|
* object represents an interface, a primitive type, an array class, or
|
|
* void.
|
|
*
|
|
* <p> See <em>The Java Language Specification</em>, section 8.2.
|
|
*
|
|
* @return the array of {@code Constructor} objects representing all the
|
|
* declared constructors of this class
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared constructors within this class
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Constructor<?>[] getDeclaredConstructors() throws SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
|
|
return copyConstructors(privateGetDeclaredConstructors(false));
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a {@code Field} object that reflects the specified declared
|
|
* field of the class or interface represented by this {@code Class}
|
|
* object. The {@code name} parameter is a {@code String} that specifies
|
|
* the simple name of the desired field.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, then this
|
|
* method does not find the {@code length} field of the array type.
|
|
*
|
|
* @param name the name of the field
|
|
* @return the {@code Field} object for the specified field in this
|
|
* class
|
|
* @throws NoSuchFieldException if a field with the specified name is
|
|
* not found.
|
|
* @throws NullPointerException if {@code name} is {@code null}
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared field
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @since JDK1.1
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.3 Field Declarations
|
|
*/
|
|
@CallerSensitive
|
|
public Field getDeclaredField(String name)
|
|
throws NoSuchFieldException, SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
|
|
Field field = searchFields(privateGetDeclaredFields(false), name);
|
|
if (field == null) {
|
|
throw new NoSuchFieldException(name);
|
|
}
|
|
return field;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a {@code Method} object that reflects the specified
|
|
* declared method of the class or interface represented by this
|
|
* {@code Class} object. The {@code name} parameter is a
|
|
* {@code String} that specifies the simple name of the desired
|
|
* method, and the {@code parameterTypes} parameter is an array of
|
|
* {@code Class} objects that identify the method's formal parameter
|
|
* types, in declared order. If more than one method with the same
|
|
* parameter types is declared in a class, and one of these methods has a
|
|
* return type that is more specific than any of the others, that method is
|
|
* returned; otherwise one of the methods is chosen arbitrarily. If the
|
|
* name is "<init>"or "<clinit>" a {@code NoSuchMethodException}
|
|
* is raised.
|
|
*
|
|
* <p> If this {@code Class} object represents an array type, then this
|
|
* method does not find the {@code clone()} method.
|
|
*
|
|
* @param name the name of the method
|
|
* @param parameterTypes the parameter array
|
|
* @return the {@code Method} object for the method of this class
|
|
* matching the specified name and parameters
|
|
* @throws NoSuchMethodException if a matching method is not found.
|
|
* @throws NullPointerException if {@code name} is {@code null}
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared method
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @jls 8.2 Class Members
|
|
* @jls 8.4 Method Declarations
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Method getDeclaredMethod(String name, Class<?>... parameterTypes)
|
|
throws NoSuchMethodException, SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
|
|
Method method = searchMethods(privateGetDeclaredMethods(false), name, parameterTypes);
|
|
if (method == null) {
|
|
throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
|
|
}
|
|
return method;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns a {@code Constructor} object that reflects the specified
|
|
* constructor of the class or interface represented by this
|
|
* {@code Class} object. The {@code parameterTypes} parameter is
|
|
* an array of {@code Class} objects that identify the constructor's
|
|
* formal parameter types, in declared order.
|
|
*
|
|
* If this {@code Class} object represents an inner class
|
|
* declared in a non-static context, the formal parameter types
|
|
* include the explicit enclosing instance as the first parameter.
|
|
*
|
|
* @param parameterTypes the parameter array
|
|
* @return The {@code Constructor} object for the constructor with the
|
|
* specified parameter list
|
|
* @throws NoSuchMethodException if a matching method is not found.
|
|
* @throws SecurityException
|
|
* If a security manager, <i>s</i>, is present and any of the
|
|
* following conditions is met:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> the caller's class loader is not the same as the
|
|
* class loader of this class and invocation of
|
|
* {@link SecurityManager#checkPermission
|
|
* s.checkPermission} method with
|
|
* {@code RuntimePermission("accessDeclaredMembers")}
|
|
* denies access to the declared constructor
|
|
*
|
|
* <li> the caller's class loader is not the same as or an
|
|
* ancestor of the class loader for the current class and
|
|
* invocation of {@link SecurityManager#checkPackageAccess
|
|
* s.checkPackageAccess()} denies access to the package
|
|
* of this class
|
|
*
|
|
* </ul>
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@CallerSensitive
|
|
public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)
|
|
throws NoSuchMethodException, SecurityException {
|
|
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
|
|
return getConstructor0(parameterTypes, Member.DECLARED);
|
|
}
|
|
|
|
/**
|
|
* Finds a resource with a given name. The rules for searching resources
|
|
* associated with a given class are implemented by the defining
|
|
* {@linkplain ClassLoader class loader} of the class. This method
|
|
* delegates to this object's class loader. If this object was loaded by
|
|
* the bootstrap class loader, the method delegates to {@link
|
|
* ClassLoader#getSystemResourceAsStream}.
|
|
*
|
|
* <p> Before delegation, an absolute resource name is constructed from the
|
|
* given resource name using this algorithm:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> If the {@code name} begins with a {@code '/'}
|
|
* (<tt>'\u002f'</tt>), then the absolute name of the resource is the
|
|
* portion of the {@code name} following the {@code '/'}.
|
|
*
|
|
* <li> Otherwise, the absolute name is of the following form:
|
|
*
|
|
* <blockquote>
|
|
* {@code modified_package_name/name}
|
|
* </blockquote>
|
|
*
|
|
* <p> Where the {@code modified_package_name} is the package name of this
|
|
* object with {@code '/'} substituted for {@code '.'}
|
|
* (<tt>'\u002e'</tt>).
|
|
*
|
|
* </ul>
|
|
*
|
|
* @param name name of the desired resource
|
|
* @return A {@link java.io.InputStream} object or {@code null} if
|
|
* no resource with this name is found
|
|
* @throws NullPointerException If {@code name} is {@code null}
|
|
* @since JDK1.1
|
|
*/
|
|
public InputStream getResourceAsStream(String name) {
|
|
name = resolveName(name);
|
|
ClassLoader cl = getClassLoader0();
|
|
if (cl==null) {
|
|
// A system class.
|
|
return ClassLoader.getSystemResourceAsStream(name);
|
|
}
|
|
return cl.getResourceAsStream(name);
|
|
}
|
|
|
|
/**
|
|
* Finds a resource with a given name. The rules for searching resources
|
|
* associated with a given class are implemented by the defining
|
|
* {@linkplain ClassLoader class loader} of the class. This method
|
|
* delegates to this object's class loader. If this object was loaded by
|
|
* the bootstrap class loader, the method delegates to {@link
|
|
* ClassLoader#getSystemResource}.
|
|
*
|
|
* <p> Before delegation, an absolute resource name is constructed from the
|
|
* given resource name using this algorithm:
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li> If the {@code name} begins with a {@code '/'}
|
|
* (<tt>'\u002f'</tt>), then the absolute name of the resource is the
|
|
* portion of the {@code name} following the {@code '/'}.
|
|
*
|
|
* <li> Otherwise, the absolute name is of the following form:
|
|
*
|
|
* <blockquote>
|
|
* {@code modified_package_name/name}
|
|
* </blockquote>
|
|
*
|
|
* <p> Where the {@code modified_package_name} is the package name of this
|
|
* object with {@code '/'} substituted for {@code '.'}
|
|
* (<tt>'\u002e'</tt>).
|
|
*
|
|
* </ul>
|
|
*
|
|
* @param name name of the desired resource
|
|
* @return A {@link java.net.URL} object or {@code null} if no
|
|
* resource with this name is found
|
|
* @since JDK1.1
|
|
*/
|
|
public java.net.URL getResource(String name) {
|
|
name = resolveName(name);
|
|
ClassLoader cl = getClassLoader0();
|
|
if (cl==null) {
|
|
// A system class.
|
|
return ClassLoader.getSystemResource(name);
|
|
}
|
|
return cl.getResource(name);
|
|
}
|
|
|
|
|
|
|
|
/** protection domain returned when the internal domain is null */
|
|
private static java.security.ProtectionDomain allPermDomain;
|
|
|
|
|
|
/**
|
|
* Returns the {@code ProtectionDomain} of this class. If there is a
|
|
* security manager installed, this method first calls the security
|
|
* manager's {@code checkPermission} method with a
|
|
* {@code RuntimePermission("getProtectionDomain")} permission to
|
|
* ensure it's ok to get the
|
|
* {@code ProtectionDomain}.
|
|
*
|
|
* @return the ProtectionDomain of this class
|
|
*
|
|
* @throws SecurityException
|
|
* if a security manager exists and its
|
|
* {@code checkPermission} method doesn't allow
|
|
* getting the ProtectionDomain.
|
|
*
|
|
* @see java.security.ProtectionDomain
|
|
* @see SecurityManager#checkPermission
|
|
* @see java.lang.RuntimePermission
|
|
* @since 1.2
|
|
*/
|
|
public java.security.ProtectionDomain getProtectionDomain() {
|
|
SecurityManager sm = System.getSecurityManager();
|
|
if (sm != null) {
|
|
sm.checkPermission(SecurityConstants.GET_PD_PERMISSION);
|
|
}
|
|
java.security.ProtectionDomain pd = getProtectionDomain0();
|
|
if (pd == null) {
|
|
if (allPermDomain == null) {
|
|
java.security.Permissions perms =
|
|
new java.security.Permissions();
|
|
perms.add(SecurityConstants.ALL_PERMISSION);
|
|
allPermDomain =
|
|
new java.security.ProtectionDomain(null, perms);
|
|
}
|
|
pd = allPermDomain;
|
|
}
|
|
return pd;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the ProtectionDomain of this class.
|
|
*/
|
|
private native java.security.ProtectionDomain getProtectionDomain0();
|
|
|
|
/*
|
|
* Return the Virtual Machine's Class object for the named
|
|
* primitive type.
|
|
*/
|
|
static native Class<?> getPrimitiveClass(String name);
|
|
|
|
/*
|
|
* Check if client is allowed to access members. If access is denied,
|
|
* throw a SecurityException.
|
|
*
|
|
* This method also enforces package access.
|
|
*
|
|
* <p> Default policy: allow all clients access with normal Java access
|
|
* control.
|
|
*/
|
|
private void checkMemberAccess(int which, Class<?> caller, boolean checkProxyInterfaces) {
|
|
final SecurityManager s = System.getSecurityManager();
|
|
if (s != null) {
|
|
/* Default policy allows access to all {@link Member#PUBLIC} members,
|
|
* as well as access to classes that have the same class loader as the caller.
|
|
* In all other cases, it requires RuntimePermission("accessDeclaredMembers")
|
|
* permission.
|
|
*/
|
|
final ClassLoader ccl = ClassLoader.getClassLoader(caller);
|
|
final ClassLoader cl = getClassLoader0();
|
|
if (which != Member.PUBLIC) {
|
|
if (ccl != cl) {
|
|
s.checkPermission(SecurityConstants.CHECK_MEMBER_ACCESS_PERMISSION);
|
|
}
|
|
}
|
|
this.checkPackageAccess(ccl, checkProxyInterfaces);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Checks if a client loaded in ClassLoader ccl is allowed to access this
|
|
* class under the current package access policy. If access is denied,
|
|
* throw a SecurityException.
|
|
*/
|
|
private void checkPackageAccess(final ClassLoader ccl, boolean checkProxyInterfaces) {
|
|
final SecurityManager s = System.getSecurityManager();
|
|
if (s != null) {
|
|
final ClassLoader cl = getClassLoader0();
|
|
|
|
if (ReflectUtil.needsPackageAccessCheck(ccl, cl)) {
|
|
String name = this.getName();
|
|
int i = name.lastIndexOf('.');
|
|
if (i != -1) {
|
|
// skip the package access check on a proxy class in default proxy package
|
|
String pkg = name.substring(0, i);
|
|
if (!Proxy.isProxyClass(this) || ReflectUtil.isNonPublicProxyClass(this)) {
|
|
s.checkPackageAccess(pkg);
|
|
}
|
|
}
|
|
}
|
|
// check package access on the proxy interfaces
|
|
if (checkProxyInterfaces && Proxy.isProxyClass(this)) {
|
|
ReflectUtil.checkProxyPackageAccess(ccl, this.getInterfaces());
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add a package name prefix if the name is not absolute Remove leading "/"
|
|
* if name is absolute
|
|
*/
|
|
private String resolveName(String name) {
|
|
if (name == null) {
|
|
return name;
|
|
}
|
|
if (!name.startsWith("/")) {
|
|
Class<?> c = this;
|
|
while (c.isArray()) {
|
|
c = c.getComponentType();
|
|
}
|
|
String baseName = c.getName();
|
|
int index = baseName.lastIndexOf('.');
|
|
if (index != -1) {
|
|
name = baseName.substring(0, index).replace('.', '/')
|
|
+"/"+name;
|
|
}
|
|
} else {
|
|
name = name.substring(1);
|
|
}
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* Atomic operations support.
|
|
*/
|
|
private static class Atomic {
|
|
// initialize Unsafe machinery here, since we need to call Class.class instance method
|
|
// and have to avoid calling it in the static initializer of the Class class...
|
|
private static final Unsafe unsafe = Unsafe.getUnsafe();
|
|
// offset of Class.reflectionData instance field
|
|
private static final long reflectionDataOffset;
|
|
// offset of Class.annotationType instance field
|
|
private static final long annotationTypeOffset;
|
|
// offset of Class.annotationData instance field
|
|
private static final long annotationDataOffset;
|
|
|
|
static {
|
|
Field[] fields = Class.class.getDeclaredFields0(false); // bypass caches
|
|
reflectionDataOffset = objectFieldOffset(fields, "reflectionData");
|
|
annotationTypeOffset = objectFieldOffset(fields, "annotationType");
|
|
annotationDataOffset = objectFieldOffset(fields, "annotationData");
|
|
}
|
|
|
|
private static long objectFieldOffset(Field[] fields, String fieldName) {
|
|
Field field = searchFields(fields, fieldName);
|
|
if (field == null) {
|
|
throw new Error("No " + fieldName + " field found in java.lang.Class");
|
|
}
|
|
return unsafe.objectFieldOffset(field);
|
|
}
|
|
|
|
static <T> boolean casReflectionData(Class<?> clazz,
|
|
SoftReference<ReflectionData<T>> oldData,
|
|
SoftReference<ReflectionData<T>> newData) {
|
|
return unsafe.compareAndSwapObject(clazz, reflectionDataOffset, oldData, newData);
|
|
}
|
|
|
|
static <T> boolean casAnnotationType(Class<?> clazz,
|
|
AnnotationType oldType,
|
|
AnnotationType newType) {
|
|
return unsafe.compareAndSwapObject(clazz, annotationTypeOffset, oldType, newType);
|
|
}
|
|
|
|
static <T> boolean casAnnotationData(Class<?> clazz,
|
|
AnnotationData oldData,
|
|
AnnotationData newData) {
|
|
return unsafe.compareAndSwapObject(clazz, annotationDataOffset, oldData, newData);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reflection support.
|
|
*/
|
|
|
|
// Caches for certain reflective results
|
|
private static boolean useCaches = true;
|
|
|
|
// reflection data that might get invalidated when JVM TI RedefineClasses() is called
|
|
private static class ReflectionData<T> {
|
|
volatile Field[] declaredFields;
|
|
volatile Field[] publicFields;
|
|
volatile Method[] declaredMethods;
|
|
volatile Method[] publicMethods;
|
|
volatile Constructor<T>[] declaredConstructors;
|
|
volatile Constructor<T>[] publicConstructors;
|
|
// Intermediate results for getFields and getMethods
|
|
volatile Field[] declaredPublicFields;
|
|
volatile Method[] declaredPublicMethods;
|
|
volatile Class<?>[] interfaces;
|
|
|
|
// Value of classRedefinedCount when we created this ReflectionData instance
|
|
final int redefinedCount;
|
|
|
|
ReflectionData(int redefinedCount) {
|
|
this.redefinedCount = redefinedCount;
|
|
}
|
|
}
|
|
|
|
private volatile transient SoftReference<ReflectionData<T>> reflectionData;
|
|
|
|
// Incremented by the VM on each call to JVM TI RedefineClasses()
|
|
// that redefines this class or a superclass.
|
|
private volatile transient int classRedefinedCount = 0;
|
|
|
|
// Lazily create and cache ReflectionData
|
|
private ReflectionData<T> reflectionData() {
|
|
SoftReference<ReflectionData<T>> reflectionData = this.reflectionData;
|
|
int classRedefinedCount = this.classRedefinedCount;
|
|
ReflectionData<T> rd;
|
|
if (useCaches &&
|
|
reflectionData != null &&
|
|
(rd = reflectionData.get()) != null &&
|
|
rd.redefinedCount == classRedefinedCount) {
|
|
return rd;
|
|
}
|
|
// else no SoftReference or cleared SoftReference or stale ReflectionData
|
|
// -> create and replace new instance
|
|
return newReflectionData(reflectionData, classRedefinedCount);
|
|
}
|
|
|
|
private ReflectionData<T> newReflectionData(SoftReference<ReflectionData<T>> oldReflectionData,
|
|
int classRedefinedCount) {
|
|
if (!useCaches) return null;
|
|
|
|
while (true) {
|
|
ReflectionData<T> rd = new ReflectionData<>(classRedefinedCount);
|
|
// try to CAS it...
|
|
if (Atomic.casReflectionData(this, oldReflectionData, new SoftReference<>(rd))) {
|
|
return rd;
|
|
}
|
|
// else retry
|
|
oldReflectionData = this.reflectionData;
|
|
classRedefinedCount = this.classRedefinedCount;
|
|
if (oldReflectionData != null &&
|
|
(rd = oldReflectionData.get()) != null &&
|
|
rd.redefinedCount == classRedefinedCount) {
|
|
return rd;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Generic signature handling
|
|
private native String getGenericSignature0();
|
|
|
|
// Generic info repository; lazily initialized
|
|
private volatile transient ClassRepository genericInfo;
|
|
|
|
// accessor for factory
|
|
private GenericsFactory getFactory() {
|
|
// create scope and factory
|
|
return CoreReflectionFactory.make(this, ClassScope.make(this));
|
|
}
|
|
|
|
// accessor for generic info repository;
|
|
// generic info is lazily initialized
|
|
private ClassRepository getGenericInfo() {
|
|
ClassRepository genericInfo = this.genericInfo;
|
|
if (genericInfo == null) {
|
|
String signature = getGenericSignature0();
|
|
if (signature == null) {
|
|
genericInfo = ClassRepository.NONE;
|
|
} else {
|
|
genericInfo = ClassRepository.make(signature, getFactory());
|
|
}
|
|
this.genericInfo = genericInfo;
|
|
}
|
|
return (genericInfo != ClassRepository.NONE) ? genericInfo : null;
|
|
}
|
|
|
|
// Annotations handling
|
|
native byte[] getRawAnnotations();
|
|
// Since 1.8
|
|
native byte[] getRawTypeAnnotations();
|
|
static byte[] getExecutableTypeAnnotationBytes(Executable ex) {
|
|
return getReflectionFactory().getExecutableTypeAnnotationBytes(ex);
|
|
}
|
|
|
|
native ConstantPool getConstantPool();
|
|
|
|
//
|
|
//
|
|
// java.lang.reflect.Field handling
|
|
//
|
|
//
|
|
|
|
// Returns an array of "root" fields. These Field objects must NOT
|
|
// be propagated to the outside world, but must instead be copied
|
|
// via ReflectionFactory.copyField.
|
|
private Field[] privateGetDeclaredFields(boolean publicOnly) {
|
|
checkInitted();
|
|
Field[] res;
|
|
ReflectionData<T> rd = reflectionData();
|
|
if (rd != null) {
|
|
res = publicOnly ? rd.declaredPublicFields : rd.declaredFields;
|
|
if (res != null) return res;
|
|
}
|
|
// No cached value available; request value from VM
|
|
res = Reflection.filterFields(this, getDeclaredFields0(publicOnly));
|
|
if (rd != null) {
|
|
if (publicOnly) {
|
|
rd.declaredPublicFields = res;
|
|
} else {
|
|
rd.declaredFields = res;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
// Returns an array of "root" fields. These Field objects must NOT
|
|
// be propagated to the outside world, but must instead be copied
|
|
// via ReflectionFactory.copyField.
|
|
private Field[] privateGetPublicFields(Set<Class<?>> traversedInterfaces) {
|
|
checkInitted();
|
|
Field[] res;
|
|
ReflectionData<T> rd = reflectionData();
|
|
if (rd != null) {
|
|
res = rd.publicFields;
|
|
if (res != null) return res;
|
|
}
|
|
|
|
// No cached value available; compute value recursively.
|
|
// Traverse in correct order for getField().
|
|
List<Field> fields = new ArrayList<>();
|
|
if (traversedInterfaces == null) {
|
|
traversedInterfaces = new HashSet<>();
|
|
}
|
|
|
|
// Local fields
|
|
Field[] tmp = privateGetDeclaredFields(true);
|
|
addAll(fields, tmp);
|
|
|
|
// Direct superinterfaces, recursively
|
|
for (Class<?> c : getInterfaces()) {
|
|
if (!traversedInterfaces.contains(c)) {
|
|
traversedInterfaces.add(c);
|
|
addAll(fields, c.privateGetPublicFields(traversedInterfaces));
|
|
}
|
|
}
|
|
|
|
// Direct superclass, recursively
|
|
if (!isInterface()) {
|
|
Class<?> c = getSuperclass();
|
|
if (c != null) {
|
|
addAll(fields, c.privateGetPublicFields(traversedInterfaces));
|
|
}
|
|
}
|
|
|
|
res = new Field[fields.size()];
|
|
fields.toArray(res);
|
|
if (rd != null) {
|
|
rd.publicFields = res;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
private static void addAll(Collection<Field> c, Field[] o) {
|
|
for (int i = 0; i < o.length; i++) {
|
|
c.add(o[i]);
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
//
|
|
// java.lang.reflect.Constructor handling
|
|
//
|
|
//
|
|
|
|
// Returns an array of "root" constructors. These Constructor
|
|
// objects must NOT be propagated to the outside world, but must
|
|
// instead be copied via ReflectionFactory.copyConstructor.
|
|
private Constructor<T>[] privateGetDeclaredConstructors(boolean publicOnly) {
|
|
checkInitted();
|
|
Constructor<T>[] res;
|
|
ReflectionData<T> rd = reflectionData();
|
|
if (rd != null) {
|
|
res = publicOnly ? rd.publicConstructors : rd.declaredConstructors;
|
|
if (res != null) return res;
|
|
}
|
|
// No cached value available; request value from VM
|
|
if (isInterface()) {
|
|
@SuppressWarnings("unchecked")
|
|
Constructor<T>[] temporaryRes = (Constructor<T>[]) new Constructor<?>[0];
|
|
res = temporaryRes;
|
|
} else {
|
|
res = getDeclaredConstructors0(publicOnly);
|
|
}
|
|
if (rd != null) {
|
|
if (publicOnly) {
|
|
rd.publicConstructors = res;
|
|
} else {
|
|
rd.declaredConstructors = res;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
//
|
|
//
|
|
// java.lang.reflect.Method handling
|
|
//
|
|
//
|
|
|
|
// Returns an array of "root" methods. These Method objects must NOT
|
|
// be propagated to the outside world, but must instead be copied
|
|
// via ReflectionFactory.copyMethod.
|
|
private Method[] privateGetDeclaredMethods(boolean publicOnly) {
|
|
checkInitted();
|
|
Method[] res;
|
|
ReflectionData<T> rd = reflectionData();
|
|
if (rd != null) {
|
|
res = publicOnly ? rd.declaredPublicMethods : rd.declaredMethods;
|
|
if (res != null) return res;
|
|
}
|
|
// No cached value available; request value from VM
|
|
res = Reflection.filterMethods(this, getDeclaredMethods0(publicOnly));
|
|
if (rd != null) {
|
|
if (publicOnly) {
|
|
rd.declaredPublicMethods = res;
|
|
} else {
|
|
rd.declaredMethods = res;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static class MethodArray {
|
|
// Don't add or remove methods except by add() or remove() calls.
|
|
private Method[] methods;
|
|
private int length;
|
|
private int defaults;
|
|
|
|
MethodArray() {
|
|
this(20);
|
|
}
|
|
|
|
MethodArray(int initialSize) {
|
|
if (initialSize < 2)
|
|
throw new IllegalArgumentException("Size should be 2 or more");
|
|
|
|
methods = new Method[initialSize];
|
|
length = 0;
|
|
defaults = 0;
|
|
}
|
|
|
|
boolean hasDefaults() {
|
|
return defaults != 0;
|
|
}
|
|
|
|
void add(Method m) {
|
|
if (length == methods.length) {
|
|
methods = Arrays.copyOf(methods, 2 * methods.length);
|
|
}
|
|
methods[length++] = m;
|
|
|
|
if (m != null && m.isDefault())
|
|
defaults++;
|
|
}
|
|
|
|
void addAll(Method[] ma) {
|
|
for (int i = 0; i < ma.length; i++) {
|
|
add(ma[i]);
|
|
}
|
|
}
|
|
|
|
void addAll(MethodArray ma) {
|
|
for (int i = 0; i < ma.length(); i++) {
|
|
add(ma.get(i));
|
|
}
|
|
}
|
|
|
|
void addIfNotPresent(Method newMethod) {
|
|
for (int i = 0; i < length; i++) {
|
|
Method m = methods[i];
|
|
if (m == newMethod || (m != null && m.equals(newMethod))) {
|
|
return;
|
|
}
|
|
}
|
|
add(newMethod);
|
|
}
|
|
|
|
void addAllIfNotPresent(MethodArray newMethods) {
|
|
for (int i = 0; i < newMethods.length(); i++) {
|
|
Method m = newMethods.get(i);
|
|
if (m != null) {
|
|
addIfNotPresent(m);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Add Methods declared in an interface to this MethodArray.
|
|
* Static methods declared in interfaces are not inherited.
|
|
*/
|
|
void addInterfaceMethods(Method[] methods) {
|
|
for (Method candidate : methods) {
|
|
if (!Modifier.isStatic(candidate.getModifiers())) {
|
|
add(candidate);
|
|
}
|
|
}
|
|
}
|
|
|
|
int length() {
|
|
return length;
|
|
}
|
|
|
|
Method get(int i) {
|
|
return methods[i];
|
|
}
|
|
|
|
Method getFirst() {
|
|
for (Method m : methods)
|
|
if (m != null)
|
|
return m;
|
|
return null;
|
|
}
|
|
|
|
void removeByNameAndDescriptor(Method toRemove) {
|
|
for (int i = 0; i < length; i++) {
|
|
Method m = methods[i];
|
|
if (m != null && matchesNameAndDescriptor(m, toRemove)) {
|
|
remove(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void remove(int i) {
|
|
if (methods[i] != null && methods[i].isDefault())
|
|
defaults--;
|
|
methods[i] = null;
|
|
}
|
|
|
|
private boolean matchesNameAndDescriptor(Method m1, Method m2) {
|
|
return m1.getReturnType() == m2.getReturnType() &&
|
|
m1.getName() == m2.getName() && // name is guaranteed to be interned
|
|
arrayContentsEq(m1.getParameterTypes(),
|
|
m2.getParameterTypes());
|
|
}
|
|
|
|
void compactAndTrim() {
|
|
int newPos = 0;
|
|
// Get rid of null slots
|
|
for (int pos = 0; pos < length; pos++) {
|
|
Method m = methods[pos];
|
|
if (m != null) {
|
|
if (pos != newPos) {
|
|
methods[newPos] = m;
|
|
}
|
|
newPos++;
|
|
}
|
|
}
|
|
if (newPos != methods.length) {
|
|
methods = Arrays.copyOf(methods, newPos);
|
|
}
|
|
}
|
|
|
|
/* Removes all Methods from this MethodArray that have a more specific
|
|
* default Method in this MethodArray.
|
|
*
|
|
* Users of MethodArray are responsible for pruning Methods that have
|
|
* a more specific <em>concrete</em> Method.
|
|
*/
|
|
void removeLessSpecifics() {
|
|
if (!hasDefaults())
|
|
return;
|
|
|
|
for (int i = 0; i < length; i++) {
|
|
Method m = get(i);
|
|
if (m == null || !m.isDefault())
|
|
continue;
|
|
|
|
for (int j = 0; j < length; j++) {
|
|
if (i == j)
|
|
continue;
|
|
|
|
Method candidate = get(j);
|
|
if (candidate == null)
|
|
continue;
|
|
|
|
if (!matchesNameAndDescriptor(m, candidate))
|
|
continue;
|
|
|
|
if (hasMoreSpecificClass(m, candidate))
|
|
remove(j);
|
|
}
|
|
}
|
|
}
|
|
|
|
Method[] getArray() {
|
|
return methods;
|
|
}
|
|
|
|
// Returns true if m1 is more specific than m2
|
|
static boolean hasMoreSpecificClass(Method m1, Method m2) {
|
|
Class<?> m1Class = m1.getDeclaringClass();
|
|
Class<?> m2Class = m2.getDeclaringClass();
|
|
return m1Class != m2Class && m2Class.isAssignableFrom(m1Class);
|
|
}
|
|
}
|
|
|
|
|
|
// Returns an array of "root" methods. These Method objects must NOT
|
|
// be propagated to the outside world, but must instead be copied
|
|
// via ReflectionFactory.copyMethod.
|
|
private Method[] privateGetPublicMethods() {
|
|
checkInitted();
|
|
Method[] res;
|
|
ReflectionData<T> rd = reflectionData();
|
|
if (rd != null) {
|
|
res = rd.publicMethods;
|
|
if (res != null) return res;
|
|
}
|
|
|
|
// No cached value available; compute value recursively.
|
|
// Start by fetching public declared methods
|
|
MethodArray methods = new MethodArray();
|
|
{
|
|
Method[] tmp = privateGetDeclaredMethods(true);
|
|
methods.addAll(tmp);
|
|
}
|
|
// Now recur over superclass and direct superinterfaces.
|
|
// Go over superinterfaces first so we can more easily filter
|
|
// out concrete implementations inherited from superclasses at
|
|
// the end.
|
|
MethodArray inheritedMethods = new MethodArray();
|
|
for (Class<?> i : getInterfaces()) {
|
|
inheritedMethods.addInterfaceMethods(i.privateGetPublicMethods());
|
|
}
|
|
if (!isInterface()) {
|
|
Class<?> c = getSuperclass();
|
|
if (c != null) {
|
|
MethodArray supers = new MethodArray();
|
|
supers.addAll(c.privateGetPublicMethods());
|
|
// Filter out concrete implementations of any
|
|
// interface methods
|
|
for (int i = 0; i < supers.length(); i++) {
|
|
Method m = supers.get(i);
|
|
if (m != null &&
|
|
!Modifier.isAbstract(m.getModifiers()) &&
|
|
!m.isDefault()) {
|
|
inheritedMethods.removeByNameAndDescriptor(m);
|
|
}
|
|
}
|
|
// Insert superclass's inherited methods before
|
|
// superinterfaces' to satisfy getMethod's search
|
|
// order
|
|
supers.addAll(inheritedMethods);
|
|
inheritedMethods = supers;
|
|
}
|
|
}
|
|
// Filter out all local methods from inherited ones
|
|
for (int i = 0; i < methods.length(); i++) {
|
|
Method m = methods.get(i);
|
|
inheritedMethods.removeByNameAndDescriptor(m);
|
|
}
|
|
methods.addAllIfNotPresent(inheritedMethods);
|
|
methods.removeLessSpecifics();
|
|
methods.compactAndTrim();
|
|
res = methods.getArray();
|
|
if (rd != null) {
|
|
rd.publicMethods = res;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
//
|
|
// Helpers for fetchers of one field, method, or constructor
|
|
//
|
|
|
|
private static Field searchFields(Field[] fields, String name) {
|
|
String internedName = name.intern();
|
|
for (int i = 0; i < fields.length; i++) {
|
|
if (fields[i].getName() == internedName) {
|
|
return getReflectionFactory().copyField(fields[i]);
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private Field getField0(String name) throws NoSuchFieldException {
|
|
// Note: the intent is that the search algorithm this routine
|
|
// uses be equivalent to the ordering imposed by
|
|
// privateGetPublicFields(). It fetches only the declared
|
|
// public fields for each class, however, to reduce the number
|
|
// of Field objects which have to be created for the common
|
|
// case where the field being requested is declared in the
|
|
// class which is being queried.
|
|
Field res;
|
|
// Search declared public fields
|
|
if ((res = searchFields(privateGetDeclaredFields(true), name)) != null) {
|
|
return res;
|
|
}
|
|
// Direct superinterfaces, recursively
|
|
Class<?>[] interfaces = getInterfaces();
|
|
for (int i = 0; i < interfaces.length; i++) {
|
|
Class<?> c = interfaces[i];
|
|
if ((res = c.getField0(name)) != null) {
|
|
return res;
|
|
}
|
|
}
|
|
// Direct superclass, recursively
|
|
if (!isInterface()) {
|
|
Class<?> c = getSuperclass();
|
|
if (c != null) {
|
|
if ((res = c.getField0(name)) != null) {
|
|
return res;
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private static Method searchMethods(Method[] methods,
|
|
String name,
|
|
Class<?>[] parameterTypes)
|
|
{
|
|
Method res = null;
|
|
String internedName = name.intern();
|
|
for (int i = 0; i < methods.length; i++) {
|
|
Method m = methods[i];
|
|
if (m.getName() == internedName
|
|
&& arrayContentsEq(parameterTypes, m.getParameterTypes())
|
|
&& (res == null
|
|
|| res.getReturnType().isAssignableFrom(m.getReturnType())))
|
|
res = m;
|
|
}
|
|
|
|
return (res == null ? res : getReflectionFactory().copyMethod(res));
|
|
}
|
|
|
|
private Method getMethod0(String name, Class<?>[] parameterTypes, boolean includeStaticMethods) {
|
|
MethodArray interfaceCandidates = new MethodArray(2);
|
|
Method res = privateGetMethodRecursive(name, parameterTypes, includeStaticMethods, interfaceCandidates);
|
|
if (res != null)
|
|
return res;
|
|
|
|
// Not found on class or superclass directly
|
|
interfaceCandidates.removeLessSpecifics();
|
|
return interfaceCandidates.getFirst(); // may be null
|
|
}
|
|
|
|
private Method privateGetMethodRecursive(String name,
|
|
Class<?>[] parameterTypes,
|
|
boolean includeStaticMethods,
|
|
MethodArray allInterfaceCandidates) {
|
|
// Note: the intent is that the search algorithm this routine
|
|
// uses be equivalent to the ordering imposed by
|
|
// privateGetPublicMethods(). It fetches only the declared
|
|
// public methods for each class, however, to reduce the
|
|
// number of Method objects which have to be created for the
|
|
// common case where the method being requested is declared in
|
|
// the class which is being queried.
|
|
//
|
|
// Due to default methods, unless a method is found on a superclass,
|
|
// methods declared in any superinterface needs to be considered.
|
|
// Collect all candidates declared in superinterfaces in {@code
|
|
// allInterfaceCandidates} and select the most specific if no match on
|
|
// a superclass is found.
|
|
|
|
// Must _not_ return root methods
|
|
Method res;
|
|
// Search declared public methods
|
|
if ((res = searchMethods(privateGetDeclaredMethods(true),
|
|
name,
|
|
parameterTypes)) != null) {
|
|
if (includeStaticMethods || !Modifier.isStatic(res.getModifiers()))
|
|
return res;
|
|
}
|
|
// Search superclass's methods
|
|
if (!isInterface()) {
|
|
Class<? super T> c = getSuperclass();
|
|
if (c != null) {
|
|
if ((res = c.getMethod0(name, parameterTypes, true)) != null) {
|
|
return res;
|
|
}
|
|
}
|
|
}
|
|
// Search superinterfaces' methods
|
|
Class<?>[] interfaces = getInterfaces();
|
|
for (Class<?> c : interfaces)
|
|
if ((res = c.getMethod0(name, parameterTypes, false)) != null)
|
|
allInterfaceCandidates.add(res);
|
|
// Not found
|
|
return null;
|
|
}
|
|
|
|
private Constructor<T> getConstructor0(Class<?>[] parameterTypes,
|
|
int which) throws NoSuchMethodException
|
|
{
|
|
Constructor<T>[] constructors = privateGetDeclaredConstructors((which == Member.PUBLIC));
|
|
for (Constructor<T> constructor : constructors) {
|
|
if (arrayContentsEq(parameterTypes,
|
|
constructor.getParameterTypes())) {
|
|
return getReflectionFactory().copyConstructor(constructor);
|
|
}
|
|
}
|
|
throw new NoSuchMethodException(getName() + ".<init>" + argumentTypesToString(parameterTypes));
|
|
}
|
|
|
|
//
|
|
// Other helpers and base implementation
|
|
//
|
|
|
|
private static boolean arrayContentsEq(Object[] a1, Object[] a2) {
|
|
if (a1 == null) {
|
|
return a2 == null || a2.length == 0;
|
|
}
|
|
|
|
if (a2 == null) {
|
|
return a1.length == 0;
|
|
}
|
|
|
|
if (a1.length != a2.length) {
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < a1.length; i++) {
|
|
if (a1[i] != a2[i]) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private static Field[] copyFields(Field[] arg) {
|
|
Field[] out = new Field[arg.length];
|
|
ReflectionFactory fact = getReflectionFactory();
|
|
for (int i = 0; i < arg.length; i++) {
|
|
out[i] = fact.copyField(arg[i]);
|
|
}
|
|
return out;
|
|
}
|
|
|
|
private static Method[] copyMethods(Method[] arg) {
|
|
Method[] out = new Method[arg.length];
|
|
ReflectionFactory fact = getReflectionFactory();
|
|
for (int i = 0; i < arg.length; i++) {
|
|
out[i] = fact.copyMethod(arg[i]);
|
|
}
|
|
return out;
|
|
}
|
|
|
|
private static <U> Constructor<U>[] copyConstructors(Constructor<U>[] arg) {
|
|
Constructor<U>[] out = arg.clone();
|
|
ReflectionFactory fact = getReflectionFactory();
|
|
for (int i = 0; i < out.length; i++) {
|
|
out[i] = fact.copyConstructor(out[i]);
|
|
}
|
|
return out;
|
|
}
|
|
|
|
private native Field[] getDeclaredFields0(boolean publicOnly);
|
|
private native Method[] getDeclaredMethods0(boolean publicOnly);
|
|
private native Constructor<T>[] getDeclaredConstructors0(boolean publicOnly);
|
|
private native Class<?>[] getDeclaredClasses0();
|
|
|
|
private static String argumentTypesToString(Class<?>[] argTypes) {
|
|
StringBuilder buf = new StringBuilder();
|
|
buf.append("(");
|
|
if (argTypes != null) {
|
|
for (int i = 0; i < argTypes.length; i++) {
|
|
if (i > 0) {
|
|
buf.append(", ");
|
|
}
|
|
Class<?> c = argTypes[i];
|
|
buf.append((c == null) ? "null" : c.getName());
|
|
}
|
|
}
|
|
buf.append(")");
|
|
return buf.toString();
|
|
}
|
|
|
|
/** use serialVersionUID from JDK 1.1 for interoperability */
|
|
private static final long serialVersionUID = 3206093459760846163L;
|
|
|
|
|
|
/**
|
|
* Class Class is special cased within the Serialization Stream Protocol.
|
|
*
|
|
* A Class instance is written initially into an ObjectOutputStream in the
|
|
* following format:
|
|
* <pre>
|
|
* {@code TC_CLASS} ClassDescriptor
|
|
* A ClassDescriptor is a special cased serialization of
|
|
* a {@code java.io.ObjectStreamClass} instance.
|
|
* </pre>
|
|
* A new handle is generated for the initial time the class descriptor
|
|
* is written into the stream. Future references to the class descriptor
|
|
* are written as references to the initial class descriptor instance.
|
|
*
|
|
* @see java.io.ObjectStreamClass
|
|
*/
|
|
private static final ObjectStreamField[] serialPersistentFields =
|
|
new ObjectStreamField[0];
|
|
|
|
|
|
/**
|
|
* Returns the assertion status that would be assigned to this
|
|
* class if it were to be initialized at the time this method is invoked.
|
|
* If this class has had its assertion status set, the most recent
|
|
* setting will be returned; otherwise, if any package default assertion
|
|
* status pertains to this class, the most recent setting for the most
|
|
* specific pertinent package default assertion status is returned;
|
|
* otherwise, if this class is not a system class (i.e., it has a
|
|
* class loader) its class loader's default assertion status is returned;
|
|
* otherwise, the system class default assertion status is returned.
|
|
* <p>
|
|
* Few programmers will have any need for this method; it is provided
|
|
* for the benefit of the JRE itself. (It allows a class to determine at
|
|
* the time that it is initialized whether assertions should be enabled.)
|
|
* Note that this method is not guaranteed to return the actual
|
|
* assertion status that was (or will be) associated with the specified
|
|
* class when it was (or will be) initialized.
|
|
*
|
|
* @return the desired assertion status of the specified class.
|
|
* @see java.lang.ClassLoader#setClassAssertionStatus
|
|
* @see java.lang.ClassLoader#setPackageAssertionStatus
|
|
* @see java.lang.ClassLoader#setDefaultAssertionStatus
|
|
* @since 1.4
|
|
*/
|
|
public boolean desiredAssertionStatus() {
|
|
ClassLoader loader = getClassLoader();
|
|
// If the loader is null this is a system class, so ask the VM
|
|
if (loader == null)
|
|
return desiredAssertionStatus0(this);
|
|
|
|
// If the classloader has been initialized with the assertion
|
|
// directives, ask it. Otherwise, ask the VM.
|
|
synchronized(loader.assertionLock) {
|
|
if (loader.classAssertionStatus != null) {
|
|
return loader.desiredAssertionStatus(getName());
|
|
}
|
|
}
|
|
return desiredAssertionStatus0(this);
|
|
}
|
|
|
|
// Retrieves the desired assertion status of this class from the VM
|
|
private static native boolean desiredAssertionStatus0(Class<?> clazz);
|
|
|
|
/**
|
|
* Returns true if and only if this class was declared as an enum in the
|
|
* source code.
|
|
*
|
|
* @return true if and only if this class was declared as an enum in the
|
|
* source code
|
|
* @since 1.5
|
|
*/
|
|
public boolean isEnum() {
|
|
// An enum must both directly extend java.lang.Enum and have
|
|
// the ENUM bit set; classes for specialized enum constants
|
|
// don't do the former.
|
|
return (this.getModifiers() & ENUM) != 0 &&
|
|
this.getSuperclass() == java.lang.Enum.class;
|
|
}
|
|
|
|
// Fetches the factory for reflective objects
|
|
private static ReflectionFactory getReflectionFactory() {
|
|
if (reflectionFactory == null) {
|
|
reflectionFactory =
|
|
java.security.AccessController.doPrivileged
|
|
(new sun.reflect.ReflectionFactory.GetReflectionFactoryAction());
|
|
}
|
|
return reflectionFactory;
|
|
}
|
|
private static ReflectionFactory reflectionFactory;
|
|
|
|
// To be able to query system properties as soon as they're available
|
|
private static boolean initted = false;
|
|
private static void checkInitted() {
|
|
if (initted) return;
|
|
AccessController.doPrivileged(new PrivilegedAction<Void>() {
|
|
public Void run() {
|
|
// Tests to ensure the system properties table is fully
|
|
// initialized. This is needed because reflection code is
|
|
// called very early in the initialization process (before
|
|
// command-line arguments have been parsed and therefore
|
|
// these user-settable properties installed.) We assume that
|
|
// if System.out is non-null then the System class has been
|
|
// fully initialized and that the bulk of the startup code
|
|
// has been run.
|
|
|
|
if (System.out == null) {
|
|
// java.lang.System not yet fully initialized
|
|
return null;
|
|
}
|
|
|
|
// Doesn't use Boolean.getBoolean to avoid class init.
|
|
String val =
|
|
System.getProperty("sun.reflect.noCaches");
|
|
if (val != null && val.equals("true")) {
|
|
useCaches = false;
|
|
}
|
|
|
|
initted = true;
|
|
return null;
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Returns the elements of this enum class or null if this
|
|
* Class object does not represent an enum type.
|
|
*
|
|
* @return an array containing the values comprising the enum class
|
|
* represented by this Class object in the order they're
|
|
* declared, or null if this Class object does not
|
|
* represent an enum type
|
|
* @since 1.5
|
|
*/
|
|
public T[] getEnumConstants() {
|
|
T[] values = getEnumConstantsShared();
|
|
return (values != null) ? values.clone() : null;
|
|
}
|
|
|
|
/**
|
|
* Returns the elements of this enum class or null if this
|
|
* Class object does not represent an enum type;
|
|
* identical to getEnumConstants except that the result is
|
|
* uncloned, cached, and shared by all callers.
|
|
*/
|
|
T[] getEnumConstantsShared() {
|
|
if (enumConstants == null) {
|
|
if (!isEnum()) return null;
|
|
try {
|
|
final Method values = getMethod("values");
|
|
java.security.AccessController.doPrivileged(
|
|
new java.security.PrivilegedAction<Void>() {
|
|
public Void run() {
|
|
values.setAccessible(true);
|
|
return null;
|
|
}
|
|
});
|
|
@SuppressWarnings("unchecked")
|
|
T[] temporaryConstants = (T[])values.invoke(null);
|
|
enumConstants = temporaryConstants;
|
|
}
|
|
// These can happen when users concoct enum-like classes
|
|
// that don't comply with the enum spec.
|
|
catch (InvocationTargetException | NoSuchMethodException |
|
|
IllegalAccessException ex) { return null; }
|
|
}
|
|
return enumConstants;
|
|
}
|
|
private volatile transient T[] enumConstants = null;
|
|
|
|
/**
|
|
* Returns a map from simple name to enum constant. This package-private
|
|
* method is used internally by Enum to implement
|
|
* {@code public static <T extends Enum<T>> T valueOf(Class<T>, String)}
|
|
* efficiently. Note that the map is returned by this method is
|
|
* created lazily on first use. Typically it won't ever get created.
|
|
*/
|
|
Map<String, T> enumConstantDirectory() {
|
|
if (enumConstantDirectory == null) {
|
|
T[] universe = getEnumConstantsShared();
|
|
if (universe == null)
|
|
throw new IllegalArgumentException(
|
|
getName() + " is not an enum type");
|
|
Map<String, T> m = new HashMap<>(2 * universe.length);
|
|
for (T constant : universe)
|
|
m.put(((Enum<?>)constant).name(), constant);
|
|
enumConstantDirectory = m;
|
|
}
|
|
return enumConstantDirectory;
|
|
}
|
|
private volatile transient Map<String, T> enumConstantDirectory = null;
|
|
|
|
/**
|
|
* Casts an object to the class or interface represented
|
|
* by this {@code Class} object.
|
|
*
|
|
* @param obj the object to be cast
|
|
* @return the object after casting, or null if obj is null
|
|
*
|
|
* @throws ClassCastException if the object is not
|
|
* null and is not assignable to the type T.
|
|
*
|
|
* @since 1.5
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public T cast(Object obj) {
|
|
if (obj != null && !isInstance(obj))
|
|
throw new ClassCastException(cannotCastMsg(obj));
|
|
return (T) obj;
|
|
}
|
|
|
|
private String cannotCastMsg(Object obj) {
|
|
return "Cannot cast " + obj.getClass().getName() + " to " + getName();
|
|
}
|
|
|
|
/**
|
|
* Casts this {@code Class} object to represent a subclass of the class
|
|
* represented by the specified class object. Checks that the cast
|
|
* is valid, and throws a {@code ClassCastException} if it is not. If
|
|
* this method succeeds, it always returns a reference to this class object.
|
|
*
|
|
* <p>This method is useful when a client needs to "narrow" the type of
|
|
* a {@code Class} object to pass it to an API that restricts the
|
|
* {@code Class} objects that it is willing to accept. A cast would
|
|
* generate a compile-time warning, as the correctness of the cast
|
|
* could not be checked at runtime (because generic types are implemented
|
|
* by erasure).
|
|
*
|
|
* @param <U> the type to cast this class object to
|
|
* @param clazz the class of the type to cast this class object to
|
|
* @return this {@code Class} object, cast to represent a subclass of
|
|
* the specified class object.
|
|
* @throws ClassCastException if this {@code Class} object does not
|
|
* represent a subclass of the specified class (here "subclass" includes
|
|
* the class itself).
|
|
* @since 1.5
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public <U> Class<? extends U> asSubclass(Class<U> clazz) {
|
|
if (clazz.isAssignableFrom(this))
|
|
return (Class<? extends U>) this;
|
|
else
|
|
throw new ClassCastException(this.toString());
|
|
}
|
|
|
|
/**
|
|
* @throws NullPointerException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public <A extends Annotation> A getAnnotation(Class<A> annotationClass) {
|
|
Objects.requireNonNull(annotationClass);
|
|
|
|
return (A) annotationData().annotations.get(annotationClass);
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
* @throws NullPointerException {@inheritDoc}
|
|
* @since 1.5
|
|
*/
|
|
@Override
|
|
public boolean isAnnotationPresent(Class<? extends Annotation> annotationClass) {
|
|
return GenericDeclaration.super.isAnnotationPresent(annotationClass);
|
|
}
|
|
|
|
/**
|
|
* @throws NullPointerException {@inheritDoc}
|
|
* @since 1.8
|
|
*/
|
|
@Override
|
|
public <A extends Annotation> A[] getAnnotationsByType(Class<A> annotationClass) {
|
|
Objects.requireNonNull(annotationClass);
|
|
|
|
AnnotationData annotationData = annotationData();
|
|
return AnnotationSupport.getAssociatedAnnotations(annotationData.declaredAnnotations,
|
|
this,
|
|
annotationClass);
|
|
}
|
|
|
|
/**
|
|
* @since 1.5
|
|
*/
|
|
public Annotation[] getAnnotations() {
|
|
return AnnotationParser.toArray(annotationData().annotations);
|
|
}
|
|
|
|
/**
|
|
* @throws NullPointerException {@inheritDoc}
|
|
* @since 1.8
|
|
*/
|
|
@Override
|
|
@SuppressWarnings("unchecked")
|
|
public <A extends Annotation> A getDeclaredAnnotation(Class<A> annotationClass) {
|
|
Objects.requireNonNull(annotationClass);
|
|
|
|
return (A) annotationData().declaredAnnotations.get(annotationClass);
|
|
}
|
|
|
|
/**
|
|
* @throws NullPointerException {@inheritDoc}
|
|
* @since 1.8
|
|
*/
|
|
@Override
|
|
public <A extends Annotation> A[] getDeclaredAnnotationsByType(Class<A> annotationClass) {
|
|
Objects.requireNonNull(annotationClass);
|
|
|
|
return AnnotationSupport.getDirectlyAndIndirectlyPresent(annotationData().declaredAnnotations,
|
|
annotationClass);
|
|
}
|
|
|
|
/**
|
|
* @since 1.5
|
|
*/
|
|
public Annotation[] getDeclaredAnnotations() {
|
|
return AnnotationParser.toArray(annotationData().declaredAnnotations);
|
|
}
|
|
|
|
// annotation data that might get invalidated when JVM TI RedefineClasses() is called
|
|
private static class AnnotationData {
|
|
final Map<Class<? extends Annotation>, Annotation> annotations;
|
|
final Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
|
|
|
|
// Value of classRedefinedCount when we created this AnnotationData instance
|
|
final int redefinedCount;
|
|
|
|
AnnotationData(Map<Class<? extends Annotation>, Annotation> annotations,
|
|
Map<Class<? extends Annotation>, Annotation> declaredAnnotations,
|
|
int redefinedCount) {
|
|
this.annotations = annotations;
|
|
this.declaredAnnotations = declaredAnnotations;
|
|
this.redefinedCount = redefinedCount;
|
|
}
|
|
}
|
|
|
|
// Annotations cache
|
|
@SuppressWarnings("UnusedDeclaration")
|
|
private volatile transient AnnotationData annotationData;
|
|
|
|
private AnnotationData annotationData() {
|
|
while (true) { // retry loop
|
|
AnnotationData annotationData = this.annotationData;
|
|
int classRedefinedCount = this.classRedefinedCount;
|
|
if (annotationData != null &&
|
|
annotationData.redefinedCount == classRedefinedCount) {
|
|
return annotationData;
|
|
}
|
|
// null or stale annotationData -> optimistically create new instance
|
|
AnnotationData newAnnotationData = createAnnotationData(classRedefinedCount);
|
|
// try to install it
|
|
if (Atomic.casAnnotationData(this, annotationData, newAnnotationData)) {
|
|
// successfully installed new AnnotationData
|
|
return newAnnotationData;
|
|
}
|
|
}
|
|
}
|
|
|
|
private AnnotationData createAnnotationData(int classRedefinedCount) {
|
|
Map<Class<? extends Annotation>, Annotation> declaredAnnotations =
|
|
AnnotationParser.parseAnnotations(getRawAnnotations(), getConstantPool(), this);
|
|
Class<?> superClass = getSuperclass();
|
|
Map<Class<? extends Annotation>, Annotation> annotations = null;
|
|
if (superClass != null) {
|
|
Map<Class<? extends Annotation>, Annotation> superAnnotations =
|
|
superClass.annotationData().annotations;
|
|
for (Map.Entry<Class<? extends Annotation>, Annotation> e : superAnnotations.entrySet()) {
|
|
Class<? extends Annotation> annotationClass = e.getKey();
|
|
if (AnnotationType.getInstance(annotationClass).isInherited()) {
|
|
if (annotations == null) { // lazy construction
|
|
annotations = new LinkedHashMap<>((Math.max(
|
|
declaredAnnotations.size(),
|
|
Math.min(12, declaredAnnotations.size() + superAnnotations.size())
|
|
) * 4 + 2) / 3
|
|
);
|
|
}
|
|
annotations.put(annotationClass, e.getValue());
|
|
}
|
|
}
|
|
}
|
|
if (annotations == null) {
|
|
// no inherited annotations -> share the Map with declaredAnnotations
|
|
annotations = declaredAnnotations;
|
|
} else {
|
|
// at least one inherited annotation -> declared may override inherited
|
|
annotations.putAll(declaredAnnotations);
|
|
}
|
|
return new AnnotationData(annotations, declaredAnnotations, classRedefinedCount);
|
|
}
|
|
|
|
// Annotation types cache their internal (AnnotationType) form
|
|
|
|
@SuppressWarnings("UnusedDeclaration")
|
|
private volatile transient AnnotationType annotationType;
|
|
|
|
boolean casAnnotationType(AnnotationType oldType, AnnotationType newType) {
|
|
return Atomic.casAnnotationType(this, oldType, newType);
|
|
}
|
|
|
|
AnnotationType getAnnotationType() {
|
|
return annotationType;
|
|
}
|
|
|
|
Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap() {
|
|
return annotationData().declaredAnnotations;
|
|
}
|
|
|
|
/* Backing store of user-defined values pertaining to this class.
|
|
* Maintained by the ClassValue class.
|
|
*/
|
|
transient ClassValue.ClassValueMap classValueMap;
|
|
|
|
/**
|
|
* Returns an {@code AnnotatedType} object that represents the use of a
|
|
* type to specify the superclass of the entity represented by this {@code
|
|
* Class} object. (The <em>use</em> of type Foo to specify the superclass
|
|
* in '... extends Foo' is distinct from the <em>declaration</em> of type
|
|
* Foo.)
|
|
*
|
|
* <p> If this {@code Class} object represents a type whose declaration
|
|
* does not explicitly indicate an annotated superclass, then the return
|
|
* value is an {@code AnnotatedType} object representing an element with no
|
|
* annotations.
|
|
*
|
|
* <p> If this {@code Class} represents either the {@code Object} class, an
|
|
* interface type, an array type, a primitive type, or void, the return
|
|
* value is {@code null}.
|
|
*
|
|
* @return an object representing the superclass
|
|
* @since 1.8
|
|
*/
|
|
public AnnotatedType getAnnotatedSuperclass() {
|
|
if (this == Object.class ||
|
|
isInterface() ||
|
|
isArray() ||
|
|
isPrimitive() ||
|
|
this == Void.TYPE) {
|
|
return null;
|
|
}
|
|
|
|
return TypeAnnotationParser.buildAnnotatedSuperclass(getRawTypeAnnotations(), getConstantPool(), this);
|
|
}
|
|
|
|
/**
|
|
* Returns an array of {@code AnnotatedType} objects that represent the use
|
|
* of types to specify superinterfaces of the entity represented by this
|
|
* {@code Class} object. (The <em>use</em> of type Foo to specify a
|
|
* superinterface in '... implements Foo' is distinct from the
|
|
* <em>declaration</em> of type Foo.)
|
|
*
|
|
* <p> If this {@code Class} object represents a class, the return value is
|
|
* an array containing objects representing the uses of interface types to
|
|
* specify interfaces implemented by the class. The order of the objects in
|
|
* the array corresponds to the order of the interface types used in the
|
|
* 'implements' clause of the declaration of this {@code Class} object.
|
|
*
|
|
* <p> If this {@code Class} object represents an interface, the return
|
|
* value is an array containing objects representing the uses of interface
|
|
* types to specify interfaces directly extended by the interface. The
|
|
* order of the objects in the array corresponds to the order of the
|
|
* interface types used in the 'extends' clause of the declaration of this
|
|
* {@code Class} object.
|
|
*
|
|
* <p> If this {@code Class} object represents a class or interface whose
|
|
* declaration does not explicitly indicate any annotated superinterfaces,
|
|
* the return value is an array of length 0.
|
|
*
|
|
* <p> If this {@code Class} object represents either the {@code Object}
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* class, an array type, a primitive type, or void, the return value is an
|
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* array of length 0.
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|
*
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* @return an array representing the superinterfaces
|
|
* @since 1.8
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*/
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public AnnotatedType[] getAnnotatedInterfaces() {
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return TypeAnnotationParser.buildAnnotatedInterfaces(getRawTypeAnnotations(), getConstantPool(), this);
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|
}
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|
}
|