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: FuncLast.java 468655 2006-10-28 07:12:06Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xpath.functions; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xml.dtm.DTMIterator; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathContext; 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.axes.SubContextList; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.compiler.Compiler; 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XNumber; 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XObject; 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Execute the Last() function. 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @xsl.usage advanced 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class FuncLast extends Function 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson static final long serialVersionUID = 9205812403085432943L; 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private boolean m_isTopLevel; 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Figure out if we're executing a toplevel expression. 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * If so, we can't be inside of a predicate. 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void postCompileStep(Compiler compiler) 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_isTopLevel = compiler.getLocationPathDepth() == -1; 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get the position in the current context node list. 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param xctxt non-null reference to XPath runtime context. 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return The number of nodes in the list. 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @throws javax.xml.transform.TransformerException 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int getCountOfContextNodeList(XPathContext xctxt) 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson throws javax.xml.transform.TransformerException 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // assert(null != m_contextNodeList, "m_contextNodeList must be non-null"); 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // If we're in a predicate, then this will return non-null. 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson SubContextList iter = m_isTopLevel ? null : xctxt.getSubContextList(); 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // System.out.println("iter: "+iter); 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (null != iter) 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return iter.getLastPos(xctxt); 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson DTMIterator cnl = xctxt.getContextNodeList(); 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int count; 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if(null != cnl) 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson count = cnl.getLength(); 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // System.out.println("count: "+count); 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson else 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson count = 0; 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return count; 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Execute the function. The function must return 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * a valid object. 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param xctxt The current execution context. 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return A valid XObject. 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @throws javax.xml.transform.TransformerException 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XNumber xnum = new XNumber((double) getCountOfContextNodeList(xctxt)); 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // System.out.println("last: "+xnum.num()); 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return xnum; 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * No arguments to process, so this does nothing. 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void fixupVariables(java.util.Vector vars, int globalsSize) 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson // no-op 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 107