| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id: FuncCurrent.java 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xpath.functions; |
| |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.axes.LocPathIterator; |
| import org.apache.xpath.axes.PredicatedNodeTest; |
| import org.apache.xpath.objects.XNodeSet; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.axes.SubContextList; |
| import org.apache.xpath.patterns.StepPattern; |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xalan.res.XSLTErrorResources; |
| |
| |
| /** |
| * Execute the current() function. |
| * @xsl.usage advanced |
| */ |
| public class FuncCurrent extends Function |
| { |
| static final long serialVersionUID = 5715316804877715008L; |
| |
| /** |
| * Execute the function. The function must return |
| * a valid object. |
| * @param xctxt The current execution context. |
| * @return A valid XObject. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException |
| { |
| |
| SubContextList subContextList = xctxt.getCurrentNodeList(); |
| int currentNode = DTM.NULL; |
| |
| if (null != subContextList) { |
| if (subContextList instanceof PredicatedNodeTest) { |
| LocPathIterator iter = ((PredicatedNodeTest)subContextList) |
| .getLocPathIterator(); |
| currentNode = iter.getCurrentContextNode(); |
| } else if(subContextList instanceof StepPattern) { |
| throw new RuntimeException(XSLMessages.createMessage( |
| XSLTErrorResources.ER_PROCESSOR_ERROR,null)); |
| } |
| } else { |
| // not predicate => ContextNode == CurrentNode |
| currentNode = xctxt.getContextNode(); |
| } |
| return new XNodeSet(currentNode, xctxt.getDTMManager()); |
| } |
| |
| /** |
| * No arguments to process, so this does nothing. |
| */ |
| public void fixupVariables(java.util.Vector vars, int globalsSize) |
| { |
| // no-op |
| } |
| |
| } |