1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22 package com.sun.org.apache.xerces.internal.dom; 23 24 import org.w3c.dom.DOMException; 25 import org.w3c.dom.DOMImplementation; 26 import org.w3c.dom.Document; 27 import org.w3c.dom.DocumentType; 28 import org.w3c.dom.Element; 29 30 31 32 /** 33 * The DOMImplementation class is description of a particular 34 * implementation of the Document Object Model. As such its data is 35 * static, shared by all instances of this implementation. 36 * <P> 37 * The DOM API requires that it be a real object rather than static 38 * methods. However, there's nothing that says it can't be a singleton, 39 * so that's how I've implemented it. 40 * 41 * @xerces.internal 42 * 43 * @since PR-DOM-Level-1-19980818. 44 */ 45 public class DOMImplementationImpl extends CoreDOMImplementationImpl 46 implements DOMImplementation { 47 48 // 49 // Data 50 // 51 52 // static 53 54 /** Dom implementation singleton. */ 55 static DOMImplementationImpl singleton = new DOMImplementationImpl(); 56 57 58 // 59 // Public methods 60 // 61 62 /** NON-DOM: Obtain and return the single shared object */ getDOMImplementation()63 public static DOMImplementation getDOMImplementation() { 64 return singleton; 65 } 66 67 // 68 // DOMImplementation methods 69 // 70 71 /** 72 * Test if the DOM implementation supports a specific "feature" -- 73 * currently meaning language and level thereof. 74 * 75 * @param feature The package name of the feature to test. 76 * In Level 1, supported values are "HTML" and "XML" (case-insensitive). 77 * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML. 78 * 79 * @param version The version number of the feature being tested. 80 * This is interpreted as "Version of the DOM API supported for the 81 * specified Feature", and in Level 1 should be "1.0" 82 * 83 * @return true iff this implementation is compatable with the 84 * specified feature and version. 85 */ hasFeature(String feature, String version)86 public boolean hasFeature(String feature, String version) { 87 if (feature == null || feature.length() == 0) { 88 return false; 89 } 90 91 boolean result = super.hasFeature(feature, version); 92 if (!result) { 93 boolean anyVersion = version == null || version.length() == 0; 94 if (feature.startsWith("+")) { 95 feature = feature.substring(1); 96 } 97 return ( 98 (feature.equalsIgnoreCase("Events") 99 && (anyVersion || version.equals("2.0"))) 100 || (feature.equalsIgnoreCase("MutationEvents") 101 && (anyVersion || version.equals("2.0"))) 102 || (feature.equalsIgnoreCase("Traversal") 103 && (anyVersion || version.equals("2.0"))) 104 || (feature.equalsIgnoreCase("Range") 105 && (anyVersion || version.equals("2.0"))) 106 || (feature.equalsIgnoreCase("MutationEvents") 107 && (anyVersion || version.equals("2.0")))); 108 } 109 return result; 110 } // hasFeature(String,String):boolean 111 112 113 114 /** 115 * Introduced in DOM Level 2. <p> 116 * 117 * Creates an XML Document object of the specified type with its document 118 * element. 119 * 120 * @param namespaceURI The namespace URI of the document 121 * element to create, or null. 122 * @param qualifiedName The qualified name of the document 123 * element to create. 124 * @param doctype The type of document to be created or null.<p> 125 * 126 * When doctype is not null, its 127 * Node.ownerDocument attribute is set to 128 * the document being created. 129 * @return Document A new Document object. 130 * @throws DOMException WRONG_DOCUMENT_ERR: Raised if doctype has 131 * already been used with a different document. 132 * @since WD-DOM-Level-2-19990923 133 */ createDocument(String namespaceURI, String qualifiedName, DocumentType doctype)134 public Document createDocument(String namespaceURI, 135 String qualifiedName, 136 DocumentType doctype) 137 throws DOMException 138 { 139 if(namespaceURI == null && qualifiedName == null && doctype == null){ 140 //if namespaceURI, qualifiedName and doctype are null, returned document is empty with 141 //no document element 142 return new DocumentImpl(); 143 } 144 else if (doctype != null && doctype.getOwnerDocument() != null) { 145 String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "WRONG_DOCUMENT_ERR", null); 146 throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, msg); 147 } 148 DocumentImpl doc = new DocumentImpl(doctype); 149 Element e = doc.createElementNS( namespaceURI, qualifiedName); 150 doc.appendChild(e); 151 return doc; 152 } 153 154 155 } // class DOMImplementationImpl 156