1/* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5/* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22package com.sun.org.apache.xpath.internal.functions; 23 24import com.sun.org.apache.xml.internal.dtm.DTM; 25import com.sun.org.apache.xml.internal.dtm.DTMIterator; 26import com.sun.org.apache.xpath.internal.XPathContext; 27import com.sun.org.apache.xpath.internal.axes.LocPathIterator; 28import com.sun.org.apache.xpath.internal.axes.PredicatedNodeTest; 29import com.sun.org.apache.xpath.internal.objects.XNodeSet; 30import com.sun.org.apache.xpath.internal.objects.XObject; 31import com.sun.org.apache.xpath.internal.axes.SubContextList; 32import com.sun.org.apache.xpath.internal.patterns.StepPattern; 33import com.sun.org.apache.xalan.internal.res.XSLMessages; 34import com.sun.org.apache.xalan.internal.res.XSLTErrorResources; 35 36 37/** 38 * Execute the current() function. 39 * @xsl.usage advanced 40 */ 41public class FuncCurrent extends Function 42{ 43 static final long serialVersionUID = 5715316804877715008L; 44 45 /** 46 * Execute the function. The function must return 47 * a valid object. 48 * @param xctxt The current execution context. 49 * @return A valid XObject. 50 * 51 * @throws javax.xml.transform.TransformerException 52 */ 53 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 54 { 55 56 SubContextList subContextList = xctxt.getCurrentNodeList(); 57 int currentNode = DTM.NULL; 58 59 if (null != subContextList) { 60 if (subContextList instanceof PredicatedNodeTest) { 61 LocPathIterator iter = ((PredicatedNodeTest)subContextList) 62 .getLocPathIterator(); 63 currentNode = iter.getCurrentContextNode(); 64 } else if(subContextList instanceof StepPattern) { 65 throw new RuntimeException(XSLMessages.createMessage( 66 XSLTErrorResources.ER_PROCESSOR_ERROR,null)); 67 } 68 } else { 69 // not predicate => ContextNode == CurrentNode 70 currentNode = xctxt.getContextNode(); 71 } 72 return new XNodeSet(currentNode, xctxt.getDTMManager()); 73 } 74 75 /** 76 * No arguments to process, so this does nothing. 77 */ 78 public void fixupVariables(java.util.Vector vars, int globalsSize) 79 { 80 // no-op 81 } 82 83} 84