19f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 29f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Licensed to the Apache Software Foundation (ASF) under one 39f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * or more contributor license agreements. See the NOTICE file 49f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed with this work for additional information 59f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * regarding copyright ownership. The ASF licenses this file 69f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to you under the Apache License, Version 2.0 (the "License"); 79f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * you may not use this file except in compliance with the License. 89f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * You may obtain a copy of the License at 99f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Unless required by applicable law or agreed to in writing, software 139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * See the License for the specific language governing permissions and 169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * limitations under the License. 179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * $Id: PrefixResolverDefault.java 468655 2006-10-28 07:12:06Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xml.utils; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.w3c.dom.NamedNodeMap; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.w3c.dom.Node; 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * This class implements a generic PrefixResolver that 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * can be used to perform prefix-to-namespace lookup 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * for the XPath object. 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @xsl.usage general 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class PrefixResolverDefault implements PrefixResolver 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * The context to resolve the prefix from, if the context 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is not given. 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Node m_context; 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Construct a PrefixResolverDefault object. 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param xpathExpressionContext The context from 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * which XPath expression prefixes will be resolved. 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Warning: This will not work correctly if xpathExpressionContext 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is an attribute node. 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public PrefixResolverDefault(Node xpathExpressionContext) 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_context = xpathExpressionContext; 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Given a namespace, get the corrisponding prefix. This assumes that 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * the PrevixResolver hold's it's own namespace context, or is a namespace 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * context itself. 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param prefix Prefix to resolve. 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return Namespace that prefix resolves to, or null if prefix 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is not bound. 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getNamespaceForPrefix(String prefix) 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return getNamespaceForPrefix(prefix, m_context); 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Given a namespace, get the corrisponding prefix. 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Warning: This will not work correctly if namespaceContext 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is an attribute node. 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param prefix Prefix to resolve. 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param namespaceContext Node from which to start searching for a 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * xmlns attribute that binds a prefix to a namespace. 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return Namespace that prefix resolves to, or null if prefix 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is not bound. 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getNamespaceForPrefix(String prefix, 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson org.w3c.dom.Node namespaceContext) 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Node parent = namespaceContext; 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String namespace = null; 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (prefix.equals("xml")) 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson namespace = Constants.S_XMLNAMESPACEURI; 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int type; 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson while ((null != parent) && (null == namespace) 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson && (((type = parent.getNodeType()) == Node.ELEMENT_NODE) 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson || (type == Node.ENTITY_REFERENCE_NODE))) 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (type == Node.ELEMENT_NODE) 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (parent.getNodeName().indexOf(prefix+":") == 0) 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return parent.getNamespaceURI(); 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson NamedNodeMap nnm = parent.getAttributes(); 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson for (int i = 0; i < nnm.getLength(); i++) 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson Node attr = nnm.item(i); 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String aname = attr.getNodeName(); 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson boolean isPrefix = aname.startsWith("xmlns:"); 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (isPrefix || aname.equals("xmlns")) 1089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int index = aname.indexOf(':'); 1109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String p = isPrefix ? aname.substring(index + 1) : ""; 1119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (p.equals(prefix)) 1139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson namespace = attr.getNodeValue(); 1159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson break; 1179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson parent = parent.getParentNode(); 1239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return namespace; 1279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Return the base identifier. 1319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return null 1339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getBaseIdentifier() 1359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return null; 1379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see PrefixResolver#handlesNullPrefixes() 1409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public boolean handlesNullPrefixes() { 1429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return false; 1439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 146