14c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/* 24c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Licensed to the Apache Software Foundation (ASF) under one 34c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * or more contributor license agreements. See the NOTICE file 44c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * distributed with this work for additional information 54c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * regarding copyright ownership. The ASF licenses this file 64c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * to you under the Apache License, Version 2.0 (the "License"); 74c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * you may not use this file except in compliance with the License. 84c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * You may obtain a copy of the License at 94c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 104c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 114c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 124c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Unless required by applicable law or agreed to in writing, software 134c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 144c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 154c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * See the License for the specific language governing permissions and 164c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * limitations under the License. 174c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 184c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/* 194c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * $Id: PrefixResolverDefault.java 468655 2006-10-28 07:12:06Z minchau $ 204c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 214c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpackage org.apache.xml.utils; 224c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 234c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.w3c.dom.NamedNodeMap; 244c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.w3c.dom.Node; 254c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 264c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/** 274c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * This class implements a generic PrefixResolver that 284c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * can be used to perform prefix-to-namespace lookup 294c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * for the XPath object. 304c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @xsl.usage general 314c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 324c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpublic class PrefixResolverDefault implements PrefixResolver 334c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson{ 344c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 354c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 364c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * The context to resolve the prefix from, if the context 374c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * is not given. 384c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 394c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson Node m_context; 404c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 414c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 424c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Construct a PrefixResolverDefault object. 434c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param xpathExpressionContext The context from 444c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * which XPath expression prefixes will be resolved. 454c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Warning: This will not work correctly if xpathExpressionContext 464c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * is an attribute node. 474c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 484c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public PrefixResolverDefault(Node xpathExpressionContext) 494c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 504c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson m_context = xpathExpressionContext; 514c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 524c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 534c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 544c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Given a namespace, get the corrisponding prefix. This assumes that 554c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * the PrevixResolver hold's it's own namespace context, or is a namespace 564c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * context itself. 574c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param prefix Prefix to resolve. 584c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return Namespace that prefix resolves to, or null if prefix 594c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * is not bound. 604c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 614c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public String getNamespaceForPrefix(String prefix) 624c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 634c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return getNamespaceForPrefix(prefix, m_context); 644c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 654c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 664c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 674c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Given a namespace, get the corrisponding prefix. 684c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Warning: This will not work correctly if namespaceContext 694c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * is an attribute node. 704c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param prefix Prefix to resolve. 714c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param namespaceContext Node from which to start searching for a 724c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * xmlns attribute that binds a prefix to a namespace. 734c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return Namespace that prefix resolves to, or null if prefix 744c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * is not bound. 754c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 764c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public String getNamespaceForPrefix(String prefix, 774c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson org.w3c.dom.Node namespaceContext) 784c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 794c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 804c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson Node parent = namespaceContext; 814c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson String namespace = null; 824c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 834c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (prefix.equals("xml")) 844c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 854c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson namespace = Constants.S_XMLNAMESPACEURI; 864c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 874c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson else 884c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 894c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson int type; 904c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 914c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson while ((null != parent) && (null == namespace) 924c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson && (((type = parent.getNodeType()) == Node.ELEMENT_NODE) 934c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson || (type == Node.ENTITY_REFERENCE_NODE))) 944c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 954c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (type == Node.ELEMENT_NODE) 964c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 974c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (parent.getNodeName().indexOf(prefix+":") == 0) 984c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return parent.getNamespaceURI(); 994c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson NamedNodeMap nnm = parent.getAttributes(); 1004c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1014c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson for (int i = 0; i < nnm.getLength(); i++) 1024c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1034c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson Node attr = nnm.item(i); 1044c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson String aname = attr.getNodeName(); 1054c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson boolean isPrefix = aname.startsWith("xmlns:"); 1064c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1074c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (isPrefix || aname.equals("xmlns")) 1084c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1094c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson int index = aname.indexOf(':'); 1104c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson String p = isPrefix ? aname.substring(index + 1) : ""; 1114c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1124c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (p.equals(prefix)) 1134c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1144c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson namespace = attr.getNodeValue(); 1154c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1164c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson break; 1174c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1184c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1194c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1204c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1214c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1224c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson parent = parent.getParentNode(); 1234c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1244c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1254c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1264c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return namespace; 1274c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1284c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1294c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 1304c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Return the base identifier. 1314c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 1324c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return null 1334c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 1344c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public String getBaseIdentifier() 1354c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1364c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return null; 1374c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1384c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 1394c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @see PrefixResolver#handlesNullPrefixes() 1404c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 1414c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public boolean handlesNullPrefixes() { 1424c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return false; 1434c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1444c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1454c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson} 146