| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * 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 org.apache.harmony.xml.dom; |
| |
| import org.w3c.dom.DOMException; |
| import org.w3c.dom.DOMImplementation; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.DocumentType; |
| |
| /** |
| * Provides a straightforward implementation of the corresponding W3C DOM |
| * interface. The class is used internally only, thus only notable members that |
| * are not in the original interface are documented (the W3C docs are quite |
| * extensive). Hope that's ok. |
| * <p> |
| * Some of the fields may have package visibility, so other classes belonging to |
| * the DOM implementation can easily access them while maintaining the DOM tree |
| * structure. |
| */ |
| public final class DOMImplementationImpl implements DOMImplementation { |
| |
| // Singleton instance. |
| private static DOMImplementationImpl instance; |
| |
| DOMImplementationImpl() { |
| } |
| |
| public Document createDocument(String namespaceURI, String qualifiedName, |
| DocumentType doctype) throws DOMException { |
| return new DocumentImpl(this, namespaceURI, qualifiedName, doctype, null); |
| } |
| |
| public DocumentType createDocumentType(String qualifiedName, |
| String publicId, String systemId) throws DOMException { |
| return new DocumentTypeImpl(null, qualifiedName, publicId, systemId); |
| } |
| |
| public boolean hasFeature(String feature, String version) { |
| boolean anyVersion = version == null || version.length() == 0; |
| if (feature.startsWith("+")) { |
| feature = feature.substring(1); |
| } |
| |
| // TODO: fully implement these APIs: |
| // "LS" (org.w3c.dom.ls) versions "3.0" |
| // "ElementTraversal" (org.w3c.dom.traversal) versions "1.0" |
| |
| if (feature.equalsIgnoreCase("Core")) { |
| return anyVersion || version.equals("1.0") || version.equals("2.0") || version.equals("3.0"); |
| } else if (feature.equalsIgnoreCase("XML")) { |
| return anyVersion || version.equals("1.0") || version.equals("2.0") || version.equals("3.0"); |
| } else if (feature.equalsIgnoreCase("XMLVersion")) { |
| return anyVersion || version.equals("1.0") || version.equals("1.1"); |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * Requests the singleton instance of the class. Creates it first, if |
| * necessary. |
| * |
| * @return The singleton Android DOMImplementationImpl instance. |
| */ |
| public static DOMImplementationImpl getInstance() { |
| if (instance == null) { |
| instance = new DOMImplementationImpl(); |
| } |
| |
| return instance; |
| } |
| |
| public Object getFeature(String feature, String version) { |
| return hasFeature(feature, version) ? this : null; |
| } |
| } |