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97 lines
3.2 KiB
97 lines
3.2 KiB
/*
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* Copyright (c) 2010, 2013, 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 javax.lang.model.util;
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import javax.annotation.processing.SupportedSourceVersion;
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import javax.lang.model.SourceVersion;
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import static javax.lang.model.SourceVersion.*;
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/**
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* A simple visitor for annotation values with default behavior
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* appropriate for the {@link SourceVersion#RELEASE_7 RELEASE_7}
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* source version. Visit methods call {@link #defaultAction
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* defaultAction} passing their arguments to {@code defaultAction}'s
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* corresponding parameters.
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*
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* <p> Methods in this class may be overridden subject to their
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* general contract. Note that annotating methods in concrete
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* subclasses with {@link java.lang.Override @Override} will help
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* ensure that methods are overridden as intended.
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*
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* <p> <b>WARNING:</b> The {@code AnnotationValueVisitor} interface
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* implemented by this class may have methods added to it in the
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* future to accommodate new, currently unknown, language structures
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* added to future versions of the Java™ programming language.
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* Therefore, methods whose names begin with {@code "visit"} may be
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* added to this class in the future; to avoid incompatibilities,
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* classes which extend this class should not declare any instance
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* methods with names beginning with {@code "visit"}.
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*
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* <p>When such a new visit method is added, the default
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* implementation in this class will be to call the {@link
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* #visitUnknown visitUnknown} method. A new simple annotation
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* value visitor class will also be introduced to correspond to the
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* new language level; this visitor will have different default
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* behavior for the visit method in question. When the new visitor is
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* introduced, all or portions of this visitor may be deprecated.
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*
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* <p>Note that adding a default implementation of a new visit method
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* in a visitor class will occur instead of adding a <em>default
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* method</em> directly in the visitor interface since a Java SE 8
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* language feature cannot be used to this version of the API since
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* this version is required to be runnable on Java SE 7
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* implementations. Future versions of the API that are only required
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* to run on Java SE 8 and later may take advantage of default methods
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* in this situation.
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*
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* @param <R> the return type of this visitor's methods
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* @param <P> the type of the additional parameter to this visitor's methods.
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*
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* @see SimpleAnnotationValueVisitor6
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* @see SimpleAnnotationValueVisitor8
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* @since 1.7
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*/
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@SupportedSourceVersion(RELEASE_7)
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public class SimpleAnnotationValueVisitor7<R, P> extends SimpleAnnotationValueVisitor6<R, P> {
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/**
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* Constructor for concrete subclasses; uses {@code null} for the
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* default value.
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*/
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protected SimpleAnnotationValueVisitor7() {
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super(null);
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}
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/**
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* Constructor for concrete subclasses; uses the argument for the
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* default value.
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*
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* @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
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*/
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protected SimpleAnnotationValueVisitor7(R defaultValue) {
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super(defaultValue);
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}
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}
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