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: ElemExsltFuncResult.java 468643 2006-10-28 06:56:03Z minchau $ 204c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 214c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpackage org.apache.xalan.templates; 224c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 234c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport javax.xml.transform.TransformerException; 244c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 254c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xalan.transformer.TransformerImpl; 264c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.XPathContext; 274c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonimport org.apache.xpath.objects.XObject; 284c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 294c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson/** 304c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Handles the EXSLT result element within an EXSLT function element. 314c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 324c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilsonpublic class ElemExsltFuncResult extends ElemVariable 334c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson{ 344c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson static final long serialVersionUID = -3478311949388304563L; 354c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /* 364c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * To keep the binary compatibility put those three private global 374c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * variables back, although they are never used in this verison 384c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 394c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // A flag indicating whether the return result is set 404c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson private boolean m_isResultSet = false; 414c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 424c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // The return result 434c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson private XObject m_result = null; 444c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 454c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // The frame size of the current caller 464c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson private int m_callerFrameSize = 0; 474c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 484c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 494c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Generate the EXSLT function return value, and assign it to the variable 504c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * index slot assigned for it in ElemExsltFunction compose(). 514c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 524c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 534c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public void execute(TransformerImpl transformer) throws TransformerException 544c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 554c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson XPathContext context = transformer.getXPathContext(); 564c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 574c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // Verify that result has not already been set by another result 584c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // element. Recursion is allowed: intermediate results are cleared 594c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // in the owner ElemExsltFunction execute(). 604c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson if (transformer.currentFuncResultSeen()) { 614c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson throw new TransformerException("An EXSLT function cannot set more than one result!"); 624c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 634c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 644c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson int sourceNode = context.getCurrentNode(); 654c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 664c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson // Set the return value; 674c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson XObject var = getValue(transformer, sourceNode); 684c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson transformer.popCurrentFuncResult(); 694c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson transformer.pushCurrentFuncResult(var); 704c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 714c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 724c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 734c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Get an integer representation of the element type. 744c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 754c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return An integer representation of the element, defined in the 764c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Constants class. 774c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @see org.apache.xalan.templates.Constants 784c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 794c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public int getXSLToken() 804c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 814c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return Constants.EXSLT_ELEMNAME_FUNCRESULT; 824c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 834c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson 844c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson /** 854c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Return the node name, defined in the 864c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * Constants class. 874c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @see org.apache.xalan.templates.Constants 884c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * @return The node name 894c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson * 904c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson */ 914c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson public String getNodeName() 924c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson { 934c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson return Constants.EXSLT_ELEMNAME_FUNCRESULT_STRING; 944c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson } 954c7a0d97cf2b27790e6236965a1d798d710d7ec7Jesse Wilson} 96