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: AVTPartXPath.java 468643 2006-10-28 06:56:03Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xalan.templates; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xml.utils.FastStringBuffer; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPath; 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathContext; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathFactory; 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.compiler.XPathParser; 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XObject; 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Simple string part of a complex AVT. 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @xsl.usage internal 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class AVTPartXPath extends AVTPart 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson static final long serialVersionUID = -4460373807550527675L; 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * The XPath object contained in this part. 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @serial 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private XPath m_xpath; 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * This function is used to fixup variables from QNames to stack frame 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * indexes at stylesheet build time. 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param vars List of QNames that correspond to variables. This list 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * should be searched backwards for the first qualified name that 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * corresponds to the variable reference qname. The position of the 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * QName in the vector from the start of the vector will be its position 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * in the stack frame (but variables above the globalsTop value will need 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to be offset to the current stack frame). 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void fixupVariables(java.util.Vector vars, int globalsSize) 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_xpath.fixupVariables(vars, globalsSize); 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Tell if this expression or it's subexpressions can traverse outside 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * the current subtree. 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return true if traversal outside the context node's subtree can occur. 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public boolean canTraverseOutsideSubtree() 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_xpath.getExpression().canTraverseOutsideSubtree(); 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Construct a simple AVT part. 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param xpath Xpath section of AVT 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public AVTPartXPath(XPath xpath) 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_xpath = xpath; 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Construct a simple AVT part. 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param val A pure string section of an AVT. 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param nsNode An object which can be used to determine the 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Namespace Name (URI) for any Namespace prefix used in the XPath. 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Usually this is based on the context where the XPath was specified, 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * such as a node within a Stylesheet. 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param xpathProcessor XPath parser 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param factory XPath factory 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param liaison An XPathContext object, providing infomation specific 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to this invocation and this thread. Maintains SAX output state, 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * variables, error handler and so on, so the transformation/XPath 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * object itself can be simultaneously invoked from multiple threads. 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @throws javax.xml.transform.TransformerException 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * TODO: Fix or remove this unused c'tor. 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public AVTPartXPath( 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson String val, org.apache.xml.utils.PrefixResolver nsNode, 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XPathParser xpathProcessor, XPathFactory factory, 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XPathContext liaison) 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throws javax.xml.transform.TransformerException 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_xpath = new XPath(val, null, nsNode, XPath.SELECT, liaison.getErrorListener()); 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get the AVT part as the original string. 1099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return the AVT part as the original string. 1119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getSimpleString() 1139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return "{" + m_xpath.getPatternString() + "}"; 1159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Write the value into the buffer. 1199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param xctxt An XPathContext object, providing infomation specific 1219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to this invocation and this thread. Maintains SAX state, variables, 1229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * error handler and so on, so the transformation/XPath object itself 1239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * can be simultaneously invoked from multiple threads. 1249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param buf Buffer to write into. 1259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param context The current source tree context. 1269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param nsNode The current namespace context (stylesheet tree context). 1279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @throws javax.xml.transform.TransformerException 1299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void evaluate( 1319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XPathContext xctxt, FastStringBuffer buf, int context, org.apache.xml.utils.PrefixResolver nsNode) 1329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throws javax.xml.transform.TransformerException 1339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XObject xobj = m_xpath.execute(xctxt, context, nsNode); 1369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (null != xobj) 1389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson xobj.appendToFsb(buf); 1409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see XSLTVisitable#callVisitors(XSLTVisitor) 1459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void callVisitors(XSLTVisitor visitor) 1479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_xpath.getExpression().callVisitors(m_xpath, visitor); 1499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 151