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: AVTPartXPath.java 468643 2006-10-28 06:56:03Z minchau $ 204c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 214c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpackage org.apache.xalan.templates; 224c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 234c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xml.utils.FastStringBuffer; 244c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.XPath; 254c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.XPathContext; 264c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.XPathFactory; 274c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.compiler.XPathParser; 284c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.objects.XObject; 294c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 304c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/** 314c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Simple string part of a complex AVT. 324c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @xsl.usage internal 334c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 344c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpublic class AVTPartXPath extends AVTPart 354c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson{ 364c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson static final long serialVersionUID = -4460373807550527675L; 374c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 384c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 394c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * The XPath object contained in this part. 404c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @serial 414c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 424c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson private XPath m_xpath; 434c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 444c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 454c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * This function is used to fixup variables from QNames to stack frame 464c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * indexes at stylesheet build time. 474c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param vars List of QNames that correspond to variables. This list 484c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * should be searched backwards for the first qualified name that 494c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * corresponds to the variable reference qname. The position of the 504c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * QName in the vector from the start of the vector will be its position 514c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * in the stack frame (but variables above the globalsTop value will need 524c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * to be offset to the current stack frame). 534c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 544c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public void fixupVariables(java.util.Vector vars, int globalsSize) 554c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 564c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson m_xpath.fixupVariables(vars, globalsSize); 574c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 584c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 594c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 604c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Tell if this expression or it's subexpressions can traverse outside 614c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * the current subtree. 624c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 634c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return true if traversal outside the context node's subtree can occur. 644c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 654c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public boolean canTraverseOutsideSubtree() 664c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 674c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return m_xpath.getExpression().canTraverseOutsideSubtree(); 684c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 694c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 704c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 714c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Construct a simple AVT part. 724c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 734c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param xpath Xpath section of AVT 744c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 754c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public AVTPartXPath(XPath xpath) 764c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 774c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson m_xpath = xpath; 784c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 794c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 804c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 814c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Construct a simple AVT part. 824c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 834c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param val A pure string section of an AVT. 844c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param nsNode An object which can be used to determine the 854c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Namespace Name (URI) for any Namespace prefix used in the XPath. 864c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Usually this is based on the context where the XPath was specified, 874c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * such as a node within a Stylesheet. 884c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param xpathProcessor XPath parser 894c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param factory XPath factory 904c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param liaison An XPathContext object, providing infomation specific 914c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * to this invocation and this thread. Maintains SAX output state, 924c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * variables, error handler and so on, so the transformation/XPath 934c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * object itself can be simultaneously invoked from multiple threads. 944c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 954c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @throws javax.xml.transform.TransformerException 964c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * TODO: Fix or remove this unused c'tor. 974c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 984c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public AVTPartXPath( 994c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson String val, org.apache.xml.utils.PrefixResolver nsNode, 1004c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson XPathParser xpathProcessor, XPathFactory factory, 1014c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson XPathContext liaison) 1024c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson throws javax.xml.transform.TransformerException 1034c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1044c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson m_xpath = new XPath(val, null, nsNode, XPath.SELECT, liaison.getErrorListener()); 1054c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1064c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1074c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 1084c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Get the AVT part as the original string. 1094c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 1104c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return the AVT part as the original string. 1114c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 1124c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public String getSimpleString() 1134c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1144c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return "{" + m_xpath.getPatternString() + "}"; 1154c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1164c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1174c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 1184c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Write the value into the buffer. 1194c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 1204c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param xctxt An XPathContext object, providing infomation specific 1214c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * to this invocation and this thread. Maintains SAX state, variables, 1224c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * error handler and so on, so the transformation/XPath object itself 1234c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * can be simultaneously invoked from multiple threads. 1244c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param buf Buffer to write into. 1254c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param context The current source tree context. 1264c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @param nsNode The current namespace context (stylesheet tree context). 1274c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 1284c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @throws javax.xml.transform.TransformerException 1294c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 1304c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public void evaluate( 1314c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson XPathContext xctxt, FastStringBuffer buf, int context, org.apache.xml.utils.PrefixResolver nsNode) 1324c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson throws javax.xml.transform.TransformerException 1334c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1344c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1354c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson XObject xobj = m_xpath.execute(xctxt, context, nsNode); 1364c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1374c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (null != xobj) 1384c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1394c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson xobj.appendToFsb(buf); 1404c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1414c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1424c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 1434c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 1444c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @see XSLTVisitable#callVisitors(XSLTVisitor) 1454c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 1464c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public void callVisitors(XSLTVisitor visitor) 1474c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 1484c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson m_xpath.getExpression().callVisitors(m_xpath, visitor); 1494c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 1504c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson} 151