author | joehw |
Wed, 18 Oct 2017 13:25:49 -0700 | |
changeset 47359 | e1a6c0168741 |
parent 47216 | 71c04702a3d5 |
child 48409 | 5ab69533994b |
permissions | -rw-r--r-- |
6 | 1 |
/* |
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
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* @LastModified: Oct 2017 |
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*/ |
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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
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* the License. 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 java.util.ArrayList; |
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import java.util.List; |
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import java.util.StringTokenizer; |
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import org.w3c.dom.DOMImplementation; |
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import org.w3c.dom.DOMImplementationList; |
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import org.w3c.dom.DOMImplementationSource; |
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/** |
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* Supply one the right implementation, based upon requested features. Each |
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* implemented <code>DOMImplementationSource</code> object is listed in the |
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* binding-specific list of available sources so that its |
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* <code>DOMImplementation</code> objects are made available. |
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* |
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* <p>See also the |
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* <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#DOMImplementationSource'> |
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* Document Object Model (DOM) Level 3 Core Specification</a>. |
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* |
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* @xerces.internal |
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* |
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*/ |
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public class DOMImplementationSourceImpl |
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implements DOMImplementationSource { |
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/** |
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* A method to request a DOM implementation. |
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* @param features A string that specifies which features are required. |
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* This is a space separated list in which each feature is specified |
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* by its name optionally followed by a space and a version number. |
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* This is something like: "XML 1.0 Traversal Events 2.0" |
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* @return An implementation that has the desired features, or |
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* <code>null</code> if this source has none. |
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*/ |
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public DOMImplementation getDOMImplementation(String features) { |
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// first check whether the CoreDOMImplementation would do |
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DOMImplementation impl = |
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CoreDOMImplementationImpl.getDOMImplementation(); |
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if (testImpl(impl, features)) { |
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return impl; |
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} |
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// if not try the DOMImplementation |
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impl = DOMImplementationImpl.getDOMImplementation(); |
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if (testImpl(impl, features)) { |
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return impl; |
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} |
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return null; |
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} |
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/** |
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* A method to request a list of DOM implementations that support the |
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* specified features and versions, as specified in . |
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* @param features A string that specifies which features and versions |
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* are required. This is a space separated list in which each feature |
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* is specified by its name optionally followed by a space and a |
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* version number. This is something like: "XML 3.0 Traversal +Events |
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* 2.0" |
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* @return A list of DOM implementations that support the desired |
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* features. |
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*/ |
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public DOMImplementationList getDOMImplementationList(String features) { |
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// first check whether the CoreDOMImplementation would do |
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DOMImplementation impl = CoreDOMImplementationImpl.getDOMImplementation(); |
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final List<DOMImplementation> implementations = new ArrayList<>(); |
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if (testImpl(impl, features)) { |
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implementations.add(impl); |
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} |
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impl = DOMImplementationImpl.getDOMImplementation(); |
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if (testImpl(impl, features)) { |
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implementations.add(impl); |
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} |
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return new DOMImplementationListImpl(implementations); |
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} |
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boolean testImpl(DOMImplementation impl, String features) { |
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StringTokenizer st = new StringTokenizer(features); |
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String feature = null; |
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String version = null; |
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if (st.hasMoreTokens()) { |
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feature = st.nextToken(); |
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} |
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while (feature != null) { |
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boolean isVersion = false; |
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if (st.hasMoreTokens()) { |
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char c; |
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version = st.nextToken(); |
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c = version.charAt(0); |
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switch (c) { |
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case '0': case '1': case '2': case '3': case '4': |
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case '5': case '6': case '7': case '8': case '9': |
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isVersion = true; |
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} |
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} else { |
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version = null; |
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} |
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if (isVersion) { |
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if (!impl.hasFeature(feature, version)) { |
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return false; |
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} |
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if (st.hasMoreTokens()) { |
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feature = st.nextToken(); |
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} else { |
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feature = null; |
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} |
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} else { |
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if (!impl.hasFeature(feature, null)) { |
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return false; |
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} |
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feature = version; |
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} |
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} |
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return true; |
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} |
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} |