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Java example source code file (CoreDOMImplementationImpl.java)
The CoreDOMImplementationImpl.java Java example source code/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * Copyright 1999-2005 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.sun.org.apache.xerces.internal.dom; import com.sun.org.apache.xerces.internal.impl.RevalidationHandler; import com.sun.org.apache.xerces.internal.parsers.DOMParserImpl; import com.sun.org.apache.xerces.internal.parsers.DTDConfiguration; import com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration; import com.sun.org.apache.xerces.internal.util.XMLChar; import com.sun.org.apache.xerces.internal.utils.ObjectFactory; import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarDescription; import com.sun.org.apache.xml.internal.serialize.DOMSerializerImpl; import org.w3c.dom.DOMException; import org.w3c.dom.DOMImplementation; import org.w3c.dom.Document; import org.w3c.dom.DocumentType; import org.w3c.dom.Element; import org.w3c.dom.ls.LSParser; import org.w3c.dom.ls.DOMImplementationLS; import org.w3c.dom.ls.LSInput; import org.w3c.dom.ls.LSOutput; import org.w3c.dom.ls.LSSerializer; /** * The DOMImplementation class is description of a particular * implementation of the Document Object Model. As such its data is * static, shared by all instances of this implementation. * <P> * The DOM API requires that it be a real object rather than static * methods. However, there's nothing that says it can't be a singleton, * so that's how I've implemented it. * <P> * This particular class, along with CoreDocumentImpl, supports the DOM * Core and Load/Save (Experimental). Optional modules are supported by * the more complete DOMImplementation class along with DocumentImpl. * * @xerces.internal * * @version $Id: CoreDOMImplementationImpl.java,v 1.6 2010-11-01 04:39:37 joehw Exp $ * @since PR-DOM-Level-1-19980818. */ public class CoreDOMImplementationImpl implements DOMImplementation, DOMImplementationLS { // // Data // // validators pool private static final int SIZE = 2; private RevalidationHandler validators[] = new RevalidationHandler[SIZE]; private RevalidationHandler dtdValidators[] = new RevalidationHandler[SIZE]; private int freeValidatorIndex = -1; private int freeDTDValidatorIndex = -1; private int currentSize = SIZE; // Document and doctype counter. Used to assign order to documents and // doctypes without owners, on an demand basis. Used for // compareDocumentPosition private int docAndDoctypeCounter = 0; // static /** Dom implementation singleton. */ static CoreDOMImplementationImpl singleton = new CoreDOMImplementationImpl(); // // Public methods // /** NON-DOM: Obtain and return the single shared object */ public static DOMImplementation getDOMImplementation() { return singleton; } // // DOMImplementation methods // /** * Test if the DOM implementation supports a specific "feature" -- * currently meaning language and level thereof. * * @param feature The package name of the feature to test. * In Level 1, supported values are "HTML" and "XML" (case-insensitive). * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML. * * @param version The version number of the feature being tested. * This is interpreted as "Version of the DOM API supported for the * specified Feature", and in Level 1 should be "1.0" * * @return true iff this implementation is compatable with the specified * feature and version. */ public boolean hasFeature(String feature, String version) { boolean anyVersion = version == null || version.length() == 0; // check if Xalan implementation is around and if yes report true for supporting // XPath API // if a plus sign "+" is prepended to any feature name, implementations // are considered in which the specified feature may not be directly // castable DOMImplementation.getFeature(feature, version). Without a // plus, only features whose interfaces are directly castable are considered. if ((feature.equalsIgnoreCase("+XPath")) && (anyVersion || version.equals("3.0"))) { try { Class xpathClass = ObjectFactory.findProviderClass( "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true); // Check if the DOM XPath implementation implements // the interface org.w3c.dom.XPathEvaluator Class interfaces[] = xpathClass.getInterfaces(); for (int i = 0; i < interfaces.length; i++) { if (interfaces[i].getName().equals( "org.w3c.dom.xpath.XPathEvaluator")) { return true; } } } catch (Exception e) { return false; } return true; } if (feature.startsWith("+")) { feature = feature.substring(1); } return ( feature.equalsIgnoreCase("Core") && (anyVersion || version.equals("1.0") || version.equals("2.0") || version.equals("3.0"))) || (feature.equalsIgnoreCase("XML") && (anyVersion || version.equals("1.0") || version.equals("2.0") || version.equals("3.0"))) || (feature.equalsIgnoreCase("LS") && (anyVersion || version.equals("3.0"))); } // hasFeature(String,String):boolean /** * Introduced in DOM Level 2. <p> * * Creates an empty DocumentType node. * * @param qualifiedName The qualified name of the document type to be created. * @param publicID The document type public identifier. * @param systemID The document type system identifier. * @since WD-DOM-Level-2-19990923 */ public DocumentType createDocumentType( String qualifiedName, String publicID, String systemID) { // REVISIT: this might allow creation of invalid name for DOCTYPE // xmlns prefix. // also there is no way for a user to turn off error checking. checkQName(qualifiedName); return new DocumentTypeImpl(null, qualifiedName, publicID, systemID); } final void checkQName(String qname){ int index = qname.indexOf(':'); int lastIndex = qname.lastIndexOf(':'); int length = qname.length(); // it is an error for NCName to have more than one ':' // check if it is valid QName [Namespace in XML production 6] if (index == 0 || index == length - 1 || lastIndex != index) { String msg = DOMMessageFormatter.formatMessage( DOMMessageFormatter.DOM_DOMAIN, "NAMESPACE_ERR", null); throw new DOMException(DOMException.NAMESPACE_ERR, msg); } int start = 0; // Namespace in XML production [6] if (index > 0) { // check that prefix is NCName if (!XMLChar.isNCNameStart(qname.charAt(start))) { String msg = DOMMessageFormatter.formatMessage( DOMMessageFormatter.DOM_DOMAIN, "INVALID_CHARACTER_ERR", null); throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg); } for (int i = 1; i < index; i++) { if (!XMLChar.isNCName(qname.charAt(i))) { String msg = DOMMessageFormatter.formatMessage( DOMMessageFormatter.DOM_DOMAIN, "INVALID_CHARACTER_ERR", null); throw new DOMException( DOMException.INVALID_CHARACTER_ERR, msg); } } start = index + 1; } // check local part if (!XMLChar.isNCNameStart(qname.charAt(start))) { // REVISIT: add qname parameter to the message String msg = DOMMessageFormatter.formatMessage( DOMMessageFormatter.DOM_DOMAIN, "INVALID_CHARACTER_ERR", null); throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg); } for (int i = start + 1; i < length; i++) { if (!XMLChar.isNCName(qname.charAt(i))) { String msg = DOMMessageFormatter.formatMessage( DOMMessageFormatter.DOM_DOMAIN, "INVALID_CHARACTER_ERR", null); throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg); } } } /** * Introduced in DOM Level 2. <p> * * Creates an XML Document object of the specified type with its document * element. * * @param namespaceURI The namespace URI of the document * element to create, or null. * @param qualifiedName The qualified name of the document * element to create. * @param doctype The type of document to be created or null.<p> * * When doctype is not null, its * Node.ownerDocument attribute is set to * the document being created. * @return Document A new Document object. * @throws DOMException WRONG_DOCUMENT_ERR: Raised if doctype has * already been used with a different document. * @since WD-DOM-Level-2-19990923 */ public Document createDocument( String namespaceURI, String qualifiedName, DocumentType doctype) throws DOMException { if (doctype != null && doctype.getOwnerDocument() != null) { String msg = DOMMessageFormatter.formatMessage( DOMMessageFormatter.DOM_DOMAIN, "WRONG_DOCUMENT_ERR", null); throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, msg); } CoreDocumentImpl doc = new CoreDocumentImpl(doctype); Element e = doc.createElementNS(namespaceURI, qualifiedName); doc.appendChild(e); return doc; } /** * DOM Level 3 WD - Experimental. */ public Object getFeature(String feature, String version) { if (singleton.hasFeature(feature, version)) { if ((feature.equalsIgnoreCase("+XPath"))) { try { Class xpathClass = ObjectFactory.findProviderClass( "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true); // Check if the DOM XPath implementation implements // the interface org.w3c.dom.XPathEvaluator Class interfaces[] = xpathClass.getInterfaces(); for (int i = 0; i < interfaces.length; i++) { if (interfaces[i].getName().equals( "org.w3c.dom.xpath.XPathEvaluator")) { return xpathClass.newInstance(); } } } catch (Exception e) { return null; } } else { return singleton; } } return null; } // DOM L3 LS /** * DOM Level 3 LS CR - Experimental. * Create a new <code>LSParser. The newly constructed parser may * then be configured by means of its <code>DOMConfiguration * object, and used to parse documents by means of its <code>parse * method. * @param mode The <code>mode argument is either * <code>MODE_SYNCHRONOUS or Other Java examples (source code examples)Here is a short list of links related to this Java CoreDOMImplementationImpl.java source code file: |
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