1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.xpath.internal.functions; 22 23 import com.sun.org.apache.xalan.internal.res.XSLMessages; 24 import com.sun.org.apache.xalan.internal.res.XSLTErrorResources; 25 import com.sun.org.apache.xml.internal.dtm.DTM; 26 import com.sun.org.apache.xml.internal.utils.QName; 27 import com.sun.org.apache.xpath.internal.XPathContext; 28 import com.sun.org.apache.xpath.internal.axes.LocPathIterator; 29 import com.sun.org.apache.xpath.internal.axes.PredicatedNodeTest; 30 import com.sun.org.apache.xpath.internal.axes.SubContextList; 31 import com.sun.org.apache.xpath.internal.objects.XNodeSet; 32 import com.sun.org.apache.xpath.internal.objects.XObject; 33 import com.sun.org.apache.xpath.internal.patterns.StepPattern; 34 import java.util.List; 35 36 37 /** 38 * Execute the current() function. 39 * @xsl.usage advanced 40 * @LastModified: Oct 2017 41 */ 42 public class FuncCurrent extends Function 43 { 44 static final long serialVersionUID = 5715316804877715008L; 45 46 /** 47 * Execute the function. The function must return 48 * a valid object. 49 * @param xctxt The current execution context. 50 * @return A valid XObject. 51 * 52 * @throws javax.xml.transform.TransformerException 53 */ 54 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 55 { 56 57 SubContextList subContextList = xctxt.getCurrentNodeList(); 58 int currentNode = DTM.NULL; 59 60 if (null != subContextList) { 61 if (subContextList instanceof PredicatedNodeTest) { 62 LocPathIterator iter = ((PredicatedNodeTest)subContextList) 63 .getLocPathIterator(); 64 currentNode = iter.getCurrentContextNode(); 65 } else if(subContextList instanceof StepPattern) { 66 throw new RuntimeException(XSLMessages.createMessage( 67 XSLTErrorResources.ER_PROCESSOR_ERROR,null)); 68 } 69 } else { 70 // not predicate => ContextNode == CurrentNode 71 currentNode = xctxt.getContextNode(); 72 } 73 return new XNodeSet(currentNode, xctxt.getDTMManager()); 74 } 75 76 /** 77 * No arguments to process, so this does nothing. 78 */ 79 public void fixupVariables(List<QName> vars, int globalsSize) 80 { 81 // no-op 82 } 83 84 }