| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.ws.commons.schema.utils; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| |
| import org.apache.ws.commons.schema.constants.Constants; |
| |
| |
| /** |
| * Implementation of {@link NamespaceContext}, which is based on a DOM node. |
| */ |
| public final class NodeNamespaceContext implements NamespacePrefixList, Serializable { |
| private static final boolean DOM_LEVEL_3; |
| |
| private static final Collection<String> XML_NS_PREFIX_COLLECTION = Collections |
| .singletonList(Constants.XML_NS_PREFIX); |
| private static final Collection<String> XMLNS_ATTRIBUTE_COLLECTION = Collections |
| .singletonList(Constants.XMLNS_ATTRIBUTE); |
| |
| |
| private final Map<String, String> declarations; |
| private String[] prefixes; |
| |
| static { |
| boolean level3 = false; |
| try { |
| Class cls = Class.forName("org.w3c.dom.UserDataHandler", false, Node.class.getClassLoader()); |
| Node.class.getMethod("getUserData", new Class[] { |
| String.class |
| }); |
| Node.class.getMethod("setUserData", new Class[] { |
| String.class, Object.class, cls |
| }); |
| level3 = true; |
| } catch (Throwable e) { |
| level3 = false; |
| } |
| DOM_LEVEL_3 = level3; |
| } |
| |
| /** |
| * Creates a new instance with the given nodes context. |
| */ |
| private NodeNamespaceContext(Map<String, String> decls) { |
| declarations = decls; |
| } |
| |
| |
| public static String getNamespacePrefix(Element el, String ns) { |
| if (DOM_LEVEL_3) { |
| return getNamespacePrefixDomLevel3(el, ns); |
| } |
| |
| return getNamespaceContext(el).getPrefix(ns); |
| } |
| private static String getNamespacePrefixDomLevel3(Element el, String ns) { |
| return el.lookupPrefix(ns); |
| } |
| |
| |
| public static String getNamespaceURI(Element el, String pfx) { |
| if (DOM_LEVEL_3) { |
| return getNamespaceURIDomLevel3(el, pfx); |
| } |
| return getNamespaceContext(el).getNamespaceURI(pfx); |
| } |
| private static String getNamespaceURIDomLevel3(Element el, String pfx) { |
| if ("".equals(pfx)) { |
| pfx = null; |
| } |
| return el.lookupNamespaceURI(pfx); |
| } |
| |
| public static NodeNamespaceContext getNamespaceContext(Node pNode) { |
| final Map<String, String> declarations = new HashMap<String, String>(); |
| new PrefixCollector() { |
| protected void declare(String pPrefix, String pNamespaceURI) { |
| declarations.put(pPrefix, pNamespaceURI); |
| } |
| } .searchAllPrefixDeclarations(pNode); |
| return new NodeNamespaceContext(declarations); |
| } |
| |
| public String[] getDeclaredPrefixes() { |
| if (prefixes == null) { |
| Collection<String> keys = declarations.keySet(); |
| prefixes = keys.toArray(new String[keys.size()]); |
| } |
| return prefixes; |
| } |
| |
| public String getNamespaceURI(String pPrefix) { |
| if (pPrefix == null) { |
| throw new IllegalArgumentException("The prefix must not be null."); |
| } |
| if (Constants.XML_NS_PREFIX.equals(pPrefix)) { |
| return Constants.XML_NS_URI; |
| } |
| if (Constants.XMLNS_ATTRIBUTE.equals(pPrefix)) { |
| return Constants.XMLNS_ATTRIBUTE_NS_URI; |
| } |
| final String uri = declarations.get(pPrefix); |
| return uri == null ? Constants.NULL_NS_URI : uri; |
| } |
| |
| public String getPrefix(String pNamespaceURI) { |
| if (pNamespaceURI == null) { |
| throw new IllegalArgumentException("The namespace URI must not be null."); |
| } |
| if (Constants.XML_NS_URI.equals(pNamespaceURI)) { |
| return Constants.XML_NS_PREFIX; |
| } |
| if (Constants.XMLNS_ATTRIBUTE_NS_URI.equals(pNamespaceURI)) { |
| return Constants.XMLNS_ATTRIBUTE; |
| } |
| for (Iterator iter = declarations.entrySet().iterator(); iter.hasNext();) { |
| Map.Entry entry = (Map.Entry)iter.next(); |
| if (pNamespaceURI.equals(entry.getValue())) { |
| return (String)entry.getKey(); |
| } |
| } |
| return null; |
| } |
| |
| public Iterator<String> getPrefixes(String pNamespaceURI) { |
| if (pNamespaceURI == null) { |
| throw new IllegalArgumentException("The namespace URI must not be null."); |
| } |
| if (Constants.XML_NS_URI.equals(pNamespaceURI)) { |
| return XML_NS_PREFIX_COLLECTION.iterator(); |
| } |
| if (Constants.XMLNS_ATTRIBUTE_NS_URI.equals(pNamespaceURI)) { |
| return XMLNS_ATTRIBUTE_COLLECTION.iterator(); |
| } |
| final List<String> list = new ArrayList<String>(); |
| for (Map.Entry<String, String> entry : declarations.entrySet()) { |
| if (pNamespaceURI.equals(entry.getValue())) { |
| list.add(entry.getKey()); |
| } |
| } |
| return list.iterator(); |
| } |
| } |