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/*
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* reserved comment block
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* DO NOT REMOVE OR ALTER!
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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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package com.sun.org.apache.xerces.internal.dom;
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import com.sun.org.apache.xerces.internal.impl.RevalidationHandler;
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import com.sun.org.apache.xerces.internal.parsers.DOMParserImpl;
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import com.sun.org.apache.xerces.internal.parsers.DTDConfiguration;
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import com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration;
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import com.sun.org.apache.xerces.internal.util.XMLChar;
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import com.sun.org.apache.xerces.internal.utils.ObjectFactory;
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import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarDescription;
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import com.sun.org.apache.xml.internal.serialize.DOMSerializerImpl;
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import org.w3c.dom.DOMException;
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import org.w3c.dom.DOMImplementation;
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import org.w3c.dom.Document;
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import org.w3c.dom.DocumentType;
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import org.w3c.dom.Element;
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import org.w3c.dom.ls.LSParser;
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import org.w3c.dom.ls.DOMImplementationLS;
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import org.w3c.dom.ls.LSInput;
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import org.w3c.dom.ls.LSOutput;
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import org.w3c.dom.ls.LSSerializer;
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/**
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* The DOMImplementation class is description of a particular
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* implementation of the Document Object Model. As such its data is
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* static, shared by all instances of this implementation.
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* <P>
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* The DOM API requires that it be a real object rather than static
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* methods. However, there's nothing that says it can't be a singleton,
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* so that's how I've implemented it.
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* <P>
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* This particular class, along with CoreDocumentImpl, supports the DOM
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* Core and Load/Save (Experimental). Optional modules are supported by
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* the more complete DOMImplementation class along with DocumentImpl.
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*
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* @xerces.internal
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*
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* @version $Id: CoreDOMImplementationImpl.java,v 1.6 2010-11-01 04:39:37 joehw Exp $
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* @since PR-DOM-Level-1-19980818.
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*/
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public class CoreDOMImplementationImpl
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implements DOMImplementation, DOMImplementationLS {
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//
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// Data
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//
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// validators pool
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private static final int SIZE = 2;
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private RevalidationHandler validators[] = new RevalidationHandler[SIZE];
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private RevalidationHandler dtdValidators[] = new RevalidationHandler[SIZE];
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private int freeValidatorIndex = -1;
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private int freeDTDValidatorIndex = -1;
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private int currentSize = SIZE;
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// Document and doctype counter. Used to assign order to documents and
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// doctypes without owners, on an demand basis. Used for
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// compareDocumentPosition
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private int docAndDoctypeCounter = 0;
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// static
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/** Dom implementation singleton. */
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static CoreDOMImplementationImpl singleton =
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new CoreDOMImplementationImpl();
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//
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// Public methods
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//
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/** NON-DOM: Obtain and return the single shared object */
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public static DOMImplementation getDOMImplementation() {
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return singleton;
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}
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//
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// DOMImplementation methods
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//
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/**
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* Test if the DOM implementation supports a specific "feature" --
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* currently meaning language and level thereof.
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*
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* @param feature The package name of the feature to test.
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* In Level 1, supported values are "HTML" and "XML" (case-insensitive).
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* At this writing, com.sun.org.apache.xerces.internal.dom supports only XML.
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*
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* @param version The version number of the feature being tested.
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* This is interpreted as "Version of the DOM API supported for the
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* specified Feature", and in Level 1 should be "1.0"
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*
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* @return true iff this implementation is compatable with the specified
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* feature and version.
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*/
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public boolean hasFeature(String feature, String version) {
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boolean anyVersion = version == null || version.length() == 0;
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// check if Xalan implementation is around and if yes report true for supporting
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// XPath API
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// if a plus sign "+" is prepended to any feature name, implementations
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// are considered in which the specified feature may not be directly
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// castable DOMImplementation.getFeature(feature, version). Without a
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// plus, only features whose interfaces are directly castable are considered.
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if ((feature.equalsIgnoreCase("+XPath"))
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&& (anyVersion || version.equals("3.0"))) {
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try {
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Class xpathClass = ObjectFactory.findProviderClass(
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"com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true);
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// Check if the DOM XPath implementation implements
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// the interface org.w3c.dom.XPathEvaluator
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Class interfaces[] = xpathClass.getInterfaces();
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for (int i = 0; i < interfaces.length; i++) {
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if (interfaces[i].getName().equals(
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"org.w3c.dom.xpath.XPathEvaluator")) {
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return true;
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}
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}
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} catch (Exception e) {
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return false;
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}
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return true;
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}
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if (feature.startsWith("+")) {
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feature = feature.substring(1);
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}
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return (
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feature.equalsIgnoreCase("Core")
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&& (anyVersion
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|| version.equals("1.0")
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|| version.equals("2.0")
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|| version.equals("3.0")))
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|| (feature.equalsIgnoreCase("XML")
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&& (anyVersion
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|| version.equals("1.0")
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|| version.equals("2.0")
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|| version.equals("3.0")))
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|| (feature.equalsIgnoreCase("LS")
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&& (anyVersion || version.equals("3.0")));
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} // hasFeature(String,String):boolean
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/**
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* Introduced in DOM Level 2. <p>
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*
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* Creates an empty DocumentType node.
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*
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* @param qualifiedName The qualified name of the document type to be created.
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* @param publicID The document type public identifier.
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* @param systemID The document type system identifier.
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* @since WD-DOM-Level-2-19990923
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*/
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public DocumentType createDocumentType( String qualifiedName,
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String publicID, String systemID) {
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// REVISIT: this might allow creation of invalid name for DOCTYPE
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// xmlns prefix.
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// also there is no way for a user to turn off error checking.
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checkQName(qualifiedName);
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return new DocumentTypeImpl(null, qualifiedName, publicID, systemID);
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}
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final void checkQName(String qname){
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int index = qname.indexOf(':');
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int lastIndex = qname.lastIndexOf(':');
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int length = qname.length();
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// it is an error for NCName to have more than one ':'
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// check if it is valid QName [Namespace in XML production 6]
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if (index == 0 || index == length - 1 || lastIndex != index) {
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"NAMESPACE_ERR",
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null);
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throw new DOMException(DOMException.NAMESPACE_ERR, msg);
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}
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int start = 0;
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// Namespace in XML production [6]
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if (index > 0) {
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// check that prefix is NCName
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if (!XMLChar.isNCNameStart(qname.charAt(start))) {
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"INVALID_CHARACTER_ERR",
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null);
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throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg);
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}
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for (int i = 1; i < index; i++) {
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if (!XMLChar.isNCName(qname.charAt(i))) {
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"INVALID_CHARACTER_ERR",
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null);
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throw new DOMException(
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DOMException.INVALID_CHARACTER_ERR,
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msg);
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}
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}
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start = index + 1;
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}
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// check local part
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if (!XMLChar.isNCNameStart(qname.charAt(start))) {
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// REVISIT: add qname parameter to the message
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"INVALID_CHARACTER_ERR",
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null);
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throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg);
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}
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for (int i = start + 1; i < length; i++) {
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if (!XMLChar.isNCName(qname.charAt(i))) {
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"INVALID_CHARACTER_ERR",
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null);
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throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg);
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}
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}
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}
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/**
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* Introduced in DOM Level 2. <p>
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*
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* Creates an XML Document object of the specified type with its document
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* element.
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*
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* @param namespaceURI The namespace URI of the document
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* element to create, or null.
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* @param qualifiedName The qualified name of the document
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* element to create.
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* @param doctype The type of document to be created or null.<p>
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*
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* When doctype is not null, its
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* Node.ownerDocument attribute is set to
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* the document being created.
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* @return Document A new Document object.
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* @throws DOMException WRONG_DOCUMENT_ERR: Raised if doctype has
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* already been used with a different document.
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* @since WD-DOM-Level-2-19990923
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*/
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public Document createDocument(
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String namespaceURI,
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String qualifiedName,
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DocumentType doctype)
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throws DOMException {
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if (doctype != null && doctype.getOwnerDocument() != null) {
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"WRONG_DOCUMENT_ERR",
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null);
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throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, msg);
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}
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CoreDocumentImpl doc = new CoreDocumentImpl(doctype);
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Element e = doc.createElementNS(namespaceURI, qualifiedName);
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doc.appendChild(e);
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return doc;
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}
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/**
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* DOM Level 3 WD - Experimental.
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*/
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public Object getFeature(String feature, String version) {
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if (singleton.hasFeature(feature, version)) {
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if ((feature.equalsIgnoreCase("+XPath"))) {
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try {
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Class xpathClass = ObjectFactory.findProviderClass(
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"com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true);
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// Check if the DOM XPath implementation implements
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// the interface org.w3c.dom.XPathEvaluator
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Class interfaces[] = xpathClass.getInterfaces();
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for (int i = 0; i < interfaces.length; i++) {
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if (interfaces[i].getName().equals(
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"org.w3c.dom.xpath.XPathEvaluator")) {
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return xpathClass.newInstance();
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}
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}
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} catch (Exception e) {
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return null;
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}
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} else {
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return singleton;
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}
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}
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return null;
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}
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// DOM L3 LS
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/**
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* DOM Level 3 LS CR - Experimental.
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* Create a new <code>LSParser</code>. The newly constructed parser may
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* then be configured by means of its <code>DOMConfiguration</code>
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* object, and used to parse documents by means of its <code>parse</code>
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* method.
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* @param mode The <code>mode</code> argument is either
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* <code>MODE_SYNCHRONOUS</code> or <code>MODE_ASYNCHRONOUS</code>, if
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* <code>mode</code> is <code>MODE_SYNCHRONOUS</code> then the
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* <code>LSParser</code> that is created will operate in synchronous
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* mode, if it's <code>MODE_ASYNCHRONOUS</code> then the
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* <code>LSParser</code> that is created will operate in asynchronous
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* mode.
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* @param schemaType An absolute URI representing the type of the schema
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* language used during the load of a <code>Document</code> using the
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* newly created <code>LSParser</code>. Note that no lexical checking
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* is done on the absolute URI. In order to create a
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* <code>LSParser</code> for any kind of schema types (i.e. the
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* LSParser will be free to use any schema found), use the value
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* <code>null</code>.
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* <p ><b>Note:</b> For W3C XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
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* , applications must use the value
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* <code>"http://www.w3.org/2001/XMLSchema"</code>. For XML DTD [<a href='http://www.w3.org/TR/2000/REC-xml-20001006'>XML 1.0</a>],
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* applications must use the value
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* <code>"http://www.w3.org/TR/REC-xml"</code>. Other Schema languages
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* are outside the scope of the W3C and therefore should recommend an
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* absolute URI in order to use this method.
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* @return The newly created <code>LSParser</code> object. This
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* <code>LSParser</code> is either synchronous or asynchronous
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* depending on the value of the <code>mode</code> argument.
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* <p ><b>Note:</b> By default, the newly created <code>LSParser</code>
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* does not contain a <code>DOMErrorHandler</code>, i.e. the value of
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* the "<a href='http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030609/core.html#parameter-error-handler'>
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* error-handler</a>" configuration parameter is <code>null</code>. However, implementations
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* may provide a default error handler at creation time. In that case,
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* the initial value of the <code>"error-handler"</code> configuration
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* parameter on the new created <code>LSParser</code> contains a
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* reference to the default error handler.
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* @exception DOMException
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* NOT_SUPPORTED_ERR: Raised if the requested mode or schema type is
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* not supported.
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*/
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public LSParser createLSParser(short mode, String schemaType)
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throws DOMException {
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if (mode != DOMImplementationLS.MODE_SYNCHRONOUS || (schemaType !=null &&
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!"http://www.w3.org/2001/XMLSchema".equals(schemaType) &&
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!"http://www.w3.org/TR/REC-xml".equals(schemaType))) {
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String msg =
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DOMMessageFormatter.formatMessage(
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DOMMessageFormatter.DOM_DOMAIN,
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"NOT_SUPPORTED_ERR",
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null);
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throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
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}
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if (schemaType != null
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&& schemaType.equals("http://www.w3.org/TR/REC-xml")) {
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return new DOMParserImpl(new DTDConfiguration(),
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schemaType);
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}
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else {
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// create default parser configuration validating against XMLSchemas
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return new DOMParserImpl(new XIncludeAwareParserConfiguration(),
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schemaType);
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}
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}
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/**
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* DOM Level 3 LS CR - Experimental.
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* Create a new <code>LSSerializer</code> object.
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378 |
* @return The newly created <code>LSSerializer</code> object.
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* <p ><b>Note:</b> By default, the newly created
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* <code>LSSerializer</code> has no <code>DOMErrorHandler</code>,
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* i.e. the value of the <code>"error-handler"</code> configuration
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* parameter is <code>null</code>. However, implementations may
|
|
383 |
* provide a default error handler at creation time. In that case, the
|
|
384 |
* initial value of the <code>"error-handler"</code> configuration
|
|
385 |
* parameter on the new created <code>LSSerializer</code> contains a
|
|
386 |
* reference to the default error handler.
|
|
387 |
*/
|
|
388 |
public LSSerializer createLSSerializer() {
|
|
389 |
return new DOMSerializerImpl();
|
|
390 |
}
|
|
391 |
/**
|
|
392 |
* DOM Level 3 LS CR - Experimental.
|
|
393 |
* Create a new empty input source.
|
|
394 |
* @return The newly created input object.
|
|
395 |
*/
|
|
396 |
public LSInput createLSInput() {
|
|
397 |
return new DOMInputImpl();
|
|
398 |
}
|
|
399 |
|
|
400 |
//
|
|
401 |
// Protected methods
|
|
402 |
//
|
|
403 |
/** NON-DOM: retrieve validator. */
|
|
404 |
synchronized RevalidationHandler getValidator(String schemaType) {
|
|
405 |
// REVISIT: implement retrieving DTD validator
|
|
406 |
if (schemaType == XMLGrammarDescription.XML_SCHEMA) {
|
|
407 |
// create new validator - we should not attempt
|
|
408 |
// to restrict the number of validation handlers being
|
|
409 |
// requested
|
|
410 |
if(freeValidatorIndex < 0) {
|
|
411 |
return (RevalidationHandler) (ObjectFactory
|
|
412 |
.newInstance(
|
|
413 |
"com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator",
|
|
414 |
ObjectFactory.findClassLoader(),
|
|
415 |
true));
|
|
416 |
}
|
|
417 |
// return first available validator
|
|
418 |
RevalidationHandler val = validators[freeValidatorIndex];
|
|
419 |
validators[freeValidatorIndex--] = null;
|
|
420 |
return val;
|
|
421 |
}
|
|
422 |
else if(schemaType == XMLGrammarDescription.XML_DTD) {
|
|
423 |
if(freeDTDValidatorIndex < 0) {
|
|
424 |
return (RevalidationHandler) (ObjectFactory
|
|
425 |
.newInstance(
|
|
426 |
"com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator",
|
|
427 |
ObjectFactory.findClassLoader(),
|
|
428 |
true));
|
|
429 |
}
|
|
430 |
// return first available validator
|
|
431 |
RevalidationHandler val = dtdValidators[freeDTDValidatorIndex];
|
|
432 |
dtdValidators[freeDTDValidatorIndex--] = null;
|
|
433 |
return val;
|
|
434 |
}
|
|
435 |
return null;
|
|
436 |
}
|
|
437 |
|
|
438 |
/** NON-DOM: release validator */
|
|
439 |
synchronized void releaseValidator(String schemaType,
|
|
440 |
RevalidationHandler validator) {
|
|
441 |
// REVISIT: implement support for DTD validators as well
|
|
442 |
if(schemaType == XMLGrammarDescription.XML_SCHEMA) {
|
|
443 |
++freeValidatorIndex;
|
|
444 |
if (validators.length == freeValidatorIndex ){
|
|
445 |
// resize size of the validators
|
|
446 |
currentSize+=SIZE;
|
|
447 |
RevalidationHandler newarray[] = new RevalidationHandler[currentSize];
|
|
448 |
System.arraycopy(validators, 0, newarray, 0, validators.length);
|
|
449 |
validators = newarray;
|
|
450 |
}
|
|
451 |
validators[freeValidatorIndex]=validator;
|
|
452 |
}
|
|
453 |
else if(schemaType == XMLGrammarDescription.XML_DTD) {
|
|
454 |
++freeDTDValidatorIndex;
|
|
455 |
if (dtdValidators.length == freeDTDValidatorIndex ){
|
|
456 |
// resize size of the validators
|
|
457 |
currentSize+=SIZE;
|
|
458 |
RevalidationHandler newarray[] = new RevalidationHandler[currentSize];
|
|
459 |
System.arraycopy(dtdValidators, 0, newarray, 0, dtdValidators.length);
|
|
460 |
dtdValidators = newarray;
|
|
461 |
}
|
|
462 |
dtdValidators[freeDTDValidatorIndex]=validator;
|
|
463 |
}
|
|
464 |
}
|
|
465 |
|
|
466 |
/** NON-DOM: increment document/doctype counter */
|
|
467 |
protected synchronized int assignDocumentNumber() {
|
|
468 |
return ++docAndDoctypeCounter;
|
|
469 |
}
|
|
470 |
/** NON-DOM: increment document/doctype counter */
|
|
471 |
protected synchronized int assignDocTypeNumber() {
|
|
472 |
return ++docAndDoctypeCounter;
|
|
473 |
}
|
|
474 |
|
|
475 |
/* DOM Level 3 LS CR - Experimental.
|
|
476 |
*
|
|
477 |
* Create a new empty output destination object where
|
|
478 |
* <code>LSOutput.characterStream</code>,
|
|
479 |
* <code>LSOutput.byteStream</code>, <code>LSOutput.systemId</code>,
|
|
480 |
* <code>LSOutput.encoding</code> are null.
|
|
481 |
|
|
482 |
* @return The newly created output object.
|
|
483 |
*/
|
|
484 |
public LSOutput createLSOutput() {
|
|
485 |
return new DOMOutputImpl();
|
|
486 |
}
|
|
487 |
|
|
488 |
} // class DOMImplementationImpl
|