Mercurial > hg > openjdk > jdk9 > jaxp
view src/java.xml/share/classes/com/sun/org/apache/xpath/internal/functions/FuncLast.java @ 1113:2fdbfbde3bc0
8162572: Update License Header for all JAXP sources
Reviewed-by: lancea
author | joehw |
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date | Mon, 17 Apr 2017 16:24:10 -0700 |
parents | 2bfaf29cc90b |
children |
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/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * 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. */ package com.sun.org.apache.xpath.internal.functions; import com.sun.org.apache.xml.internal.dtm.DTMIterator; import com.sun.org.apache.xpath.internal.XPathContext; import com.sun.org.apache.xpath.internal.axes.SubContextList; import com.sun.org.apache.xpath.internal.compiler.Compiler; import com.sun.org.apache.xpath.internal.objects.XNumber; import com.sun.org.apache.xpath.internal.objects.XObject; /** * Execute the Last() function. * @xsl.usage advanced */ public class FuncLast extends Function { static final long serialVersionUID = 9205812403085432943L; private boolean m_isTopLevel; /** * Figure out if we're executing a toplevel expression. * If so, we can't be inside of a predicate. */ public void postCompileStep(Compiler compiler) { m_isTopLevel = compiler.getLocationPathDepth() == -1; } /** * Get the position in the current context node list. * * @param xctxt non-null reference to XPath runtime context. * * @return The number of nodes in the list. * * @throws javax.xml.transform.TransformerException */ public int getCountOfContextNodeList(XPathContext xctxt) throws javax.xml.transform.TransformerException { // assert(null != m_contextNodeList, "m_contextNodeList must be non-null"); // If we're in a predicate, then this will return non-null. SubContextList iter = m_isTopLevel ? null : xctxt.getSubContextList(); // System.out.println("iter: "+iter); if (null != iter) return iter.getLastPos(xctxt); DTMIterator cnl = xctxt.getContextNodeList(); int count; if(null != cnl) { count = cnl.getLength(); // System.out.println("count: "+count); } else count = 0; return count; } /** * 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 { XNumber xnum = new XNumber((double) getCountOfContextNodeList(xctxt)); // System.out.println("last: "+xnum.num()); return xnum; } /** * No arguments to process, so this does nothing. */ public void fixupVariables(java.util.Vector vars, int globalsSize) { // no-op } }