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: ElemExsltFuncResult.java 468643 2006-10-28 06:56:03Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xalan.templates; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport javax.xml.transform.TransformerException; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xalan.transformer.TransformerImpl; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathContext; 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XObject; 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Handles the EXSLT result element within an EXSLT function element. 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class ElemExsltFuncResult extends ElemVariable 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson static final long serialVersionUID = -3478311949388304563L; 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /* 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * To keep the binary compatibility put those three private global 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * variables back, although they are never used in this verison 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // A flag indicating whether the return result is set 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private boolean m_isResultSet = false; 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // The return result 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private XObject m_result = null; 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // The frame size of the current caller 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private int m_callerFrameSize = 0; 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Generate the EXSLT function return value, and assign it to the variable 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * index slot assigned for it in ElemExsltFunction compose(). 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void execute(TransformerImpl transformer) throws TransformerException 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XPathContext context = transformer.getXPathContext(); 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Verify that result has not already been set by another result 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // element. Recursion is allowed: intermediate results are cleared 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // in the owner ElemExsltFunction execute(). 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (transformer.currentFuncResultSeen()) { 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throw new TransformerException("An EXSLT function cannot set more than one result!"); 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int sourceNode = context.getCurrentNode(); 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // Set the return value; 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XObject var = getValue(transformer, sourceNode); 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson transformer.popCurrentFuncResult(); 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson transformer.pushCurrentFuncResult(var); 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get an integer representation of the element type. 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return An integer representation of the element, defined in the 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Constants class. 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see org.apache.xalan.templates.Constants 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int getXSLToken() 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Constants.EXSLT_ELEMNAME_FUNCRESULT; 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Return the node name, defined in the 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Constants class. 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see org.apache.xalan.templates.Constants 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return The node name 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getNodeName() 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Constants.EXSLT_ELEMNAME_FUNCRESULT_STRING; 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 96