Source Code Cross Referenced for PSVIDOMImplementationImpl.java in  » XML » xerces-2_9_1 » org » apache » xerces » dom » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » xerces 2_9_1 » org.apache.xerces.dom 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:
018:        package org.apache.xerces.dom;
019:
020:        import org.w3c.dom.DOMException;
021:        import org.w3c.dom.DOMImplementation;
022:        import org.w3c.dom.Document;
023:        import org.w3c.dom.DocumentType;
024:        import org.w3c.dom.Element;
025:
026:        /**
027:         * The DOMImplementation class is description of a particular
028:         * implementation of the Document Object Model. As such its data is
029:         * static, shared by all instances of this implementation.
030:         * <P>
031:         * The DOM API requires that it be a real object rather than static
032:         * methods. However, there's nothing that says it can't be a singleton,
033:         * so that's how I've implemented it.
034:         * 
035:         * @xerces.internal
036:         *
037:         * @version $Id: PSVIDOMImplementationImpl.java 516291 2007-03-09 04:26:22Z mrglavas $
038:         * @since  PR-DOM-Level-1-19980818.
039:         */
040:        public class PSVIDOMImplementationImpl extends
041:                CoreDOMImplementationImpl {
042:
043:            //
044:            // Data
045:            //
046:
047:            // static
048:
049:            /** Dom implementation singleton. */
050:            static PSVIDOMImplementationImpl singleton = new PSVIDOMImplementationImpl();
051:
052:            //
053:            // Public methods
054:            //
055:
056:            /** NON-DOM: Obtain and return the single shared object */
057:            public static DOMImplementation getDOMImplementation() {
058:                return singleton;
059:            }
060:
061:            //
062:            // DOMImplementation methods
063:            //
064:
065:            /** 
066:             * Test if the DOM implementation supports a specific "feature" --
067:             * currently meaning language and level thereof.
068:             * 
069:             * @param feature      The package name of the feature to test.
070:             * In Level 1, supported values are "HTML" and "XML" (case-insensitive).
071:             * At this writing, org.apache.xerces.dom supports only XML.
072:             *
073:             * @param version      The version number of the feature being tested.
074:             * This is interpreted as "Version of the DOM API supported for the
075:             * specified Feature", and in Level 1 should be "1.0"
076:             *
077:             * @return    true iff this implementation is compatable with the specified
078:             * feature and version.
079:             */
080:            public boolean hasFeature(String feature, String version) {
081:                return super .hasFeature(feature, version)
082:                        || feature.equalsIgnoreCase("psvi");
083:            } // hasFeature(String,String):boolean
084:
085:            /**
086:             * Introduced in DOM Level 2. <p>
087:             * 
088:             * Creates an XML Document object of the specified type with its document
089:             * element.
090:             *
091:             * @param namespaceURI     The namespace URI of the document
092:             *                         element to create, or null. 
093:             * @param qualifiedName    The qualified name of the document
094:             *                         element to create. 
095:             * @param doctype          The type of document to be created or null.<p>
096:             *
097:             *                         When doctype is not null, its
098:             *                         Node.ownerDocument attribute is set to
099:             *                         the document being created.
100:             * @return Document        A new Document object.
101:             * @throws DOMException    WRONG_DOCUMENT_ERR: Raised if doctype has
102:             *                         already been used with a different document.
103:             * @since WD-DOM-Level-2-19990923
104:             */
105:            public Document createDocument(String namespaceURI,
106:                    String qualifiedName, DocumentType doctype)
107:                    throws DOMException {
108:                if (doctype != null && doctype.getOwnerDocument() != null) {
109:                    throw new DOMException(DOMException.WRONG_DOCUMENT_ERR,
110:                            DOMMessageFormatter.formatMessage(
111:                                    DOMMessageFormatter.XML_DOMAIN,
112:                                    "WRONG_DOCUMENT_ERR", null));
113:                }
114:                DocumentImpl doc = new PSVIDocumentImpl(doctype);
115:                // If namespaceURI and qualifiedName are null return a Document with no document element.
116:                if (qualifiedName != null || namespaceURI != null) {
117:                    Element e = doc
118:                            .createElementNS(namespaceURI, qualifiedName);
119:                    doc.appendChild(e);
120:                }
121:                return doc;
122:            }
123:
124:        } // class DOMImplementationImpl
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