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411 lines
16 KiB
411 lines
16 KiB
/*
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* Copyright (c) 2007, 2018, 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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* Copyright 1999-2005 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* $Id: FunctionTable.java,v 1.3 2005/09/28 13:49:34 pvedula Exp $
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*/
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package com.sun.org.apache.xpath.internal.compiler;
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import com.sun.org.apache.xpath.internal.Expression;
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import com.sun.org.apache.xpath.internal.functions.Function;
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import java.util.HashMap;
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import javax.xml.transform.TransformerException;
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/**
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* The function table for XPath.
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*/
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public class FunctionTable
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{
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/** The 'current()' id. */
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public static final int FUNC_CURRENT = 0;
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/** The 'last()' id. */
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public static final int FUNC_LAST = 1;
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/** The 'position()' id. */
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public static final int FUNC_POSITION = 2;
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/** The 'count()' id. */
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public static final int FUNC_COUNT = 3;
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/** The 'id()' id. */
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public static final int FUNC_ID = 4;
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/** The 'key()' id (XSLT). */
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public static final int FUNC_KEY = 5;
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/** The 'local-name()' id. */
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public static final int FUNC_LOCAL_PART = 7;
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/** The 'namespace-uri()' id. */
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public static final int FUNC_NAMESPACE = 8;
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/** The 'name()' id. */
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public static final int FUNC_QNAME = 9;
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/** The 'generate-id()' id. */
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public static final int FUNC_GENERATE_ID = 10;
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/** The 'not()' id. */
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public static final int FUNC_NOT = 11;
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/** The 'true()' id. */
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public static final int FUNC_TRUE = 12;
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/** The 'false()' id. */
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public static final int FUNC_FALSE = 13;
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/** The 'boolean()' id. */
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public static final int FUNC_BOOLEAN = 14;
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/** The 'number()' id. */
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public static final int FUNC_NUMBER = 15;
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/** The 'floor()' id. */
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public static final int FUNC_FLOOR = 16;
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/** The 'ceiling()' id. */
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public static final int FUNC_CEILING = 17;
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/** The 'round()' id. */
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public static final int FUNC_ROUND = 18;
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/** The 'sum()' id. */
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public static final int FUNC_SUM = 19;
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/** The 'string()' id. */
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public static final int FUNC_STRING = 20;
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/** The 'starts-with()' id. */
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public static final int FUNC_STARTS_WITH = 21;
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/** The 'contains()' id. */
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public static final int FUNC_CONTAINS = 22;
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/** The 'substring-before()' id. */
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public static final int FUNC_SUBSTRING_BEFORE = 23;
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/** The 'substring-after()' id. */
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public static final int FUNC_SUBSTRING_AFTER = 24;
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/** The 'normalize-space()' id. */
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public static final int FUNC_NORMALIZE_SPACE = 25;
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/** The 'translate()' id. */
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public static final int FUNC_TRANSLATE = 26;
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/** The 'concat()' id. */
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public static final int FUNC_CONCAT = 27;
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/** The 'substring()' id. */
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public static final int FUNC_SUBSTRING = 29;
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/** The 'string-length()' id. */
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public static final int FUNC_STRING_LENGTH = 30;
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/** The 'system-property()' id. */
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public static final int FUNC_SYSTEM_PROPERTY = 31;
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/** The 'lang()' id. */
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public static final int FUNC_LANG = 32;
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/** The 'function-available()' id (XSLT). */
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public static final int FUNC_EXT_FUNCTION_AVAILABLE = 33;
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/** The 'element-available()' id (XSLT). */
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public static final int FUNC_EXT_ELEM_AVAILABLE = 34;
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/** The 'unparsed-entity-uri()' id (XSLT). */
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public static final int FUNC_UNPARSED_ENTITY_URI = 36;
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// Proprietary
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/** The 'document-location()' id (Proprietary). */
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public static final int FUNC_DOCLOCATION = 35;
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/**
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* The function table.
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*/
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private static Class m_functions[];
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/** Table of function name to function ID associations. */
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private static HashMap m_functionID = new HashMap();
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/**
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* The function table contains customized functions
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*/
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private Class m_functions_customer[] = new Class[NUM_ALLOWABLE_ADDINS];
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/**
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* Table of function name to function ID associations for customized functions
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*/
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private HashMap m_functionID_customer = new HashMap();
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/**
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* Number of built in functions. Be sure to update this as
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* built-in functions are added.
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*/
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private static final int NUM_BUILT_IN_FUNCS = 37;
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/**
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* Number of built-in functions that may be added.
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*/
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private static final int NUM_ALLOWABLE_ADDINS = 30;
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/**
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* The index to the next free function index.
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*/
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private int m_funcNextFreeIndex = NUM_BUILT_IN_FUNCS;
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static
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{
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m_functions = new Class[NUM_BUILT_IN_FUNCS];
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m_functions[FUNC_CURRENT] = com.sun.org.apache.xpath.internal.functions.FuncCurrent.class;
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m_functions[FUNC_LAST] = com.sun.org.apache.xpath.internal.functions.FuncLast.class;
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m_functions[FUNC_POSITION] = com.sun.org.apache.xpath.internal.functions.FuncPosition.class;
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m_functions[FUNC_COUNT] = com.sun.org.apache.xpath.internal.functions.FuncCount.class;
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m_functions[FUNC_ID] = com.sun.org.apache.xpath.internal.functions.FuncId.class;
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// J2SE does not support Xalan interpretive
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// m_functions[FUNC_KEY] =
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// com.sun.org.apache.xalan.internal.templates.FuncKey.class;
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m_functions[FUNC_LOCAL_PART] =
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com.sun.org.apache.xpath.internal.functions.FuncLocalPart.class;
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m_functions[FUNC_NAMESPACE] =
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com.sun.org.apache.xpath.internal.functions.FuncNamespace.class;
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m_functions[FUNC_QNAME] = com.sun.org.apache.xpath.internal.functions.FuncQname.class;
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m_functions[FUNC_GENERATE_ID] =
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com.sun.org.apache.xpath.internal.functions.FuncGenerateId.class;
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m_functions[FUNC_NOT] = com.sun.org.apache.xpath.internal.functions.FuncNot.class;
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m_functions[FUNC_TRUE] = com.sun.org.apache.xpath.internal.functions.FuncTrue.class;
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m_functions[FUNC_FALSE] = com.sun.org.apache.xpath.internal.functions.FuncFalse.class;
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m_functions[FUNC_BOOLEAN] = com.sun.org.apache.xpath.internal.functions.FuncBoolean.class;
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m_functions[FUNC_LANG] = com.sun.org.apache.xpath.internal.functions.FuncLang.class;
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m_functions[FUNC_NUMBER] = com.sun.org.apache.xpath.internal.functions.FuncNumber.class;
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m_functions[FUNC_FLOOR] = com.sun.org.apache.xpath.internal.functions.FuncFloor.class;
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m_functions[FUNC_CEILING] = com.sun.org.apache.xpath.internal.functions.FuncCeiling.class;
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m_functions[FUNC_ROUND] = com.sun.org.apache.xpath.internal.functions.FuncRound.class;
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m_functions[FUNC_SUM] = com.sun.org.apache.xpath.internal.functions.FuncSum.class;
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m_functions[FUNC_STRING] = com.sun.org.apache.xpath.internal.functions.FuncString.class;
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m_functions[FUNC_STARTS_WITH] =
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com.sun.org.apache.xpath.internal.functions.FuncStartsWith.class;
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m_functions[FUNC_CONTAINS] = com.sun.org.apache.xpath.internal.functions.FuncContains.class;
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m_functions[FUNC_SUBSTRING_BEFORE] =
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com.sun.org.apache.xpath.internal.functions.FuncSubstringBefore.class;
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m_functions[FUNC_SUBSTRING_AFTER] =
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com.sun.org.apache.xpath.internal.functions.FuncSubstringAfter.class;
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m_functions[FUNC_NORMALIZE_SPACE] =
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com.sun.org.apache.xpath.internal.functions.FuncNormalizeSpace.class;
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m_functions[FUNC_TRANSLATE] =
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com.sun.org.apache.xpath.internal.functions.FuncTranslate.class;
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m_functions[FUNC_CONCAT] = com.sun.org.apache.xpath.internal.functions.FuncConcat.class;
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m_functions[FUNC_SYSTEM_PROPERTY] =
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com.sun.org.apache.xpath.internal.functions.FuncSystemProperty.class;
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m_functions[FUNC_EXT_FUNCTION_AVAILABLE] =
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com.sun.org.apache.xpath.internal.functions.FuncExtFunctionAvailable.class;
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m_functions[FUNC_EXT_ELEM_AVAILABLE] =
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com.sun.org.apache.xpath.internal.functions.FuncExtElementAvailable.class;
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m_functions[FUNC_SUBSTRING] =
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com.sun.org.apache.xpath.internal.functions.FuncSubstring.class;
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m_functions[FUNC_STRING_LENGTH] =
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com.sun.org.apache.xpath.internal.functions.FuncStringLength.class;
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m_functions[FUNC_DOCLOCATION] =
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com.sun.org.apache.xpath.internal.functions.FuncDoclocation.class;
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m_functions[FUNC_UNPARSED_ENTITY_URI] =
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com.sun.org.apache.xpath.internal.functions.FuncUnparsedEntityURI.class;
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}
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static{
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m_functionID.put(Keywords.FUNC_CURRENT_STRING,
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new Integer(FunctionTable.FUNC_CURRENT));
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m_functionID.put(Keywords.FUNC_LAST_STRING,
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new Integer(FunctionTable.FUNC_LAST));
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m_functionID.put(Keywords.FUNC_POSITION_STRING,
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new Integer(FunctionTable.FUNC_POSITION));
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m_functionID.put(Keywords.FUNC_COUNT_STRING,
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new Integer(FunctionTable.FUNC_COUNT));
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m_functionID.put(Keywords.FUNC_ID_STRING,
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new Integer(FunctionTable.FUNC_ID));
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m_functionID.put(Keywords.FUNC_KEY_STRING,
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new Integer(FunctionTable.FUNC_KEY));
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m_functionID.put(Keywords.FUNC_LOCAL_PART_STRING,
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new Integer(FunctionTable.FUNC_LOCAL_PART));
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m_functionID.put(Keywords.FUNC_NAMESPACE_STRING,
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new Integer(FunctionTable.FUNC_NAMESPACE));
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m_functionID.put(Keywords.FUNC_NAME_STRING,
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new Integer(FunctionTable.FUNC_QNAME));
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m_functionID.put(Keywords.FUNC_GENERATE_ID_STRING,
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new Integer(FunctionTable.FUNC_GENERATE_ID));
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m_functionID.put(Keywords.FUNC_NOT_STRING,
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new Integer(FunctionTable.FUNC_NOT));
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m_functionID.put(Keywords.FUNC_TRUE_STRING,
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new Integer(FunctionTable.FUNC_TRUE));
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m_functionID.put(Keywords.FUNC_FALSE_STRING,
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new Integer(FunctionTable.FUNC_FALSE));
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m_functionID.put(Keywords.FUNC_BOOLEAN_STRING,
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new Integer(FunctionTable.FUNC_BOOLEAN));
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m_functionID.put(Keywords.FUNC_LANG_STRING,
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new Integer(FunctionTable.FUNC_LANG));
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m_functionID.put(Keywords.FUNC_NUMBER_STRING,
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new Integer(FunctionTable.FUNC_NUMBER));
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m_functionID.put(Keywords.FUNC_FLOOR_STRING,
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new Integer(FunctionTable.FUNC_FLOOR));
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m_functionID.put(Keywords.FUNC_CEILING_STRING,
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new Integer(FunctionTable.FUNC_CEILING));
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m_functionID.put(Keywords.FUNC_ROUND_STRING,
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new Integer(FunctionTable.FUNC_ROUND));
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m_functionID.put(Keywords.FUNC_SUM_STRING,
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new Integer(FunctionTable.FUNC_SUM));
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m_functionID.put(Keywords.FUNC_STRING_STRING,
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new Integer(FunctionTable.FUNC_STRING));
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m_functionID.put(Keywords.FUNC_STARTS_WITH_STRING,
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new Integer(FunctionTable.FUNC_STARTS_WITH));
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m_functionID.put(Keywords.FUNC_CONTAINS_STRING,
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new Integer(FunctionTable.FUNC_CONTAINS));
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m_functionID.put(Keywords.FUNC_SUBSTRING_BEFORE_STRING,
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new Integer(FunctionTable.FUNC_SUBSTRING_BEFORE));
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m_functionID.put(Keywords.FUNC_SUBSTRING_AFTER_STRING,
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new Integer(FunctionTable.FUNC_SUBSTRING_AFTER));
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m_functionID.put(Keywords.FUNC_NORMALIZE_SPACE_STRING,
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new Integer(FunctionTable.FUNC_NORMALIZE_SPACE));
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m_functionID.put(Keywords.FUNC_TRANSLATE_STRING,
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new Integer(FunctionTable.FUNC_TRANSLATE));
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m_functionID.put(Keywords.FUNC_CONCAT_STRING,
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new Integer(FunctionTable.FUNC_CONCAT));
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m_functionID.put(Keywords.FUNC_SYSTEM_PROPERTY_STRING,
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new Integer(FunctionTable.FUNC_SYSTEM_PROPERTY));
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m_functionID.put(Keywords.FUNC_EXT_FUNCTION_AVAILABLE_STRING,
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new Integer(FunctionTable.FUNC_EXT_FUNCTION_AVAILABLE));
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m_functionID.put(Keywords.FUNC_EXT_ELEM_AVAILABLE_STRING,
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new Integer(FunctionTable.FUNC_EXT_ELEM_AVAILABLE));
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m_functionID.put(Keywords.FUNC_SUBSTRING_STRING,
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new Integer(FunctionTable.FUNC_SUBSTRING));
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m_functionID.put(Keywords.FUNC_STRING_LENGTH_STRING,
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new Integer(FunctionTable.FUNC_STRING_LENGTH));
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m_functionID.put(Keywords.FUNC_UNPARSED_ENTITY_URI_STRING,
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new Integer(FunctionTable.FUNC_UNPARSED_ENTITY_URI));
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m_functionID.put(Keywords.FUNC_DOCLOCATION_STRING,
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new Integer(FunctionTable.FUNC_DOCLOCATION));
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}
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public FunctionTable(){
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}
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/**
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* Return the name of the a function in the static table. Needed to avoid
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* making the table publicly available.
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*/
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String getFunctionName(int funcID) {
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if (funcID < NUM_BUILT_IN_FUNCS) return m_functions[funcID].getName();
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else return m_functions_customer[funcID - NUM_BUILT_IN_FUNCS].getName();
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}
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/**
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* Obtain a new Function object from a function ID.
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*
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* @param which The function ID, which may correspond to one of the FUNC_XXX
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* values found in {@link com.sun.org.apache.xpath.internal.compiler.FunctionTable}, but may
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* be a value installed by an external module.
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*
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* @return a a new Function instance.
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*
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* @throws javax.xml.transform.TransformerException if ClassNotFoundException,
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* IllegalAccessException, or InstantiationException is thrown.
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*/
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Function getFunction(int which)
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throws javax.xml.transform.TransformerException
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{
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try{
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if (which < NUM_BUILT_IN_FUNCS)
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return (Function) m_functions[which].newInstance();
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else
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return (Function) m_functions_customer[
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which-NUM_BUILT_IN_FUNCS].newInstance();
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}catch (IllegalAccessException ex){
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throw new TransformerException(ex.getMessage());
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}catch (InstantiationException ex){
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throw new TransformerException(ex.getMessage());
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}
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}
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/**
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* Obtain a function ID from a given function name
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* @param key the function name in a java.lang.String format.
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* @return a function ID, which may correspond to one of the FUNC_XXX values
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* found in {@link com.sun.org.apache.xpath.internal.compiler.FunctionTable}, but may be a
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* value installed by an external module.
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*/
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Object getFunctionID(String key){
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Object id = m_functionID_customer.get(key);
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if (null == id) id = m_functionID.get(key);
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return id;
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}
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/**
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* Install a built-in function.
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* @param name The unqualified name of the function, must not be null
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* @param func A Implementation of an XPath Function object.
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* @return the position of the function in the internal index.
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*/
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public int installFunction(String name, Class func)
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{
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int funcIndex;
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Object funcIndexObj = getFunctionID(name);
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if (null != funcIndexObj)
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{
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funcIndex = ((Integer) funcIndexObj).intValue();
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if (funcIndex < NUM_BUILT_IN_FUNCS){
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funcIndex = m_funcNextFreeIndex++;
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m_functionID_customer.put(name, new Integer(funcIndex));
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}
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m_functions_customer[funcIndex - NUM_BUILT_IN_FUNCS] = func;
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}
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else
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{
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funcIndex = m_funcNextFreeIndex++;
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m_functions_customer[funcIndex-NUM_BUILT_IN_FUNCS] = func;
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m_functionID_customer.put(name,
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new Integer(funcIndex));
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}
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return funcIndex;
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}
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/**
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* Tell if a built-in, non-namespaced function is available.
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*
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* @param methName The local name of the function.
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*
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* @return True if the function can be executed.
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*/
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public boolean functionAvailable(String methName)
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{
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Object tblEntry = m_functionID.get(methName);
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if (null != tblEntry) return true;
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else{
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tblEntry = m_functionID_customer.get(methName);
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return (null != tblEntry)? true : false;
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}
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}
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}
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