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.xalan.internal.xsltc.compiler; 23 24import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; 25import com.sun.org.apache.bcel.internal.generic.ILOAD; 26import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE; 27import com.sun.org.apache.bcel.internal.generic.InstructionList; 28import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; 29import com.sun.org.apache.xalan.internal.xsltc.compiler.util.CompareGenerator; 30import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; 31import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TestGenerator; 32 33/** 34 * @author Jacek Ambroziak 35 * @author Santiago Pericas-Geertsen 36 */ 37final class LastCall extends FunctionCall { 38 39 public LastCall(QName fname) { 40 super(fname); 41 } 42 43 public boolean hasPositionCall() { 44 return true; 45 } 46 47 public boolean hasLastCall() { 48 return true; 49 } 50 51 public void translate(ClassGenerator classGen, MethodGenerator methodGen) { 52 final InstructionList il = methodGen.getInstructionList(); 53 54 if (methodGen instanceof CompareGenerator) { 55 il.append(((CompareGenerator)methodGen).loadLastNode()); 56 } 57 else if (methodGen instanceof TestGenerator) { 58 il.append(new ILOAD(LAST_INDEX)); 59 } 60 else { 61 final ConstantPoolGen cpg = classGen.getConstantPool(); 62 final int getLast = cpg.addInterfaceMethodref(NODE_ITERATOR, 63 "getLast", 64 "()I"); 65 il.append(methodGen.loadIterator()); 66 il.append(new INVOKEINTERFACE(getLast, 1)); 67 } 68 } 69} 70