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 22 package com.sun.org.apache.xalan.internal.xsltc.compiler; 23 24 import java.util.Vector; 25 26 import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; 27 import com.sun.org.apache.bcel.internal.generic.IFLT; 28 import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; 29 import com.sun.org.apache.bcel.internal.generic.InstructionList; 30 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; 31 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; 32 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; 33 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; 34 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; 35 36 /** 37 * @author Jacek Ambroziak 38 * @author Santiago Pericas-Geertsen 39 * @author Morten Jorgensen 40 */ 41 final class ContainsCall extends FunctionCall { 42 43 private Expression _base = null; 44 private Expression _token = null; 45 46 /** 47 * Create a contains() call - two arguments, both strings 48 */ 49 public ContainsCall(QName fname, Vector arguments) { 50 super(fname, arguments); 51 } 52 53 /** 54 * This XPath function returns true/false values 55 */ 56 public boolean isBoolean() { 57 return true; 58 } 59 60 /** 61 * Type check the two parameters for this function 62 */ 63 public Type typeCheck(SymbolTable stable) throws TypeCheckError { 64 65 // Check that the function was passed exactly two arguments 66 if (argumentCount() != 2) { 67 throw new TypeCheckError(ErrorMsg.ILLEGAL_ARG_ERR, getName(), this); 68 } 69 70 // The first argument must be a String, or cast to a String 71 _base = argument(0); 72 Type baseType = _base.typeCheck(stable); 73 if (baseType != Type.String) 74 _base = new CastExpr(_base, Type.String); 75 76 // The second argument must also be a String, or cast to a String 77 _token = argument(1); 78 Type tokenType = _token.typeCheck(stable); 79 if (tokenType != Type.String) 80 _token = new CastExpr(_token, Type.String); 81 82 return _type = Type.Boolean; 83 } 84 85 /** 86 * Compile the expression - leave boolean expression on stack 87 */ 88 public void translate(ClassGenerator classGen, MethodGenerator methodGen) { 89 translateDesynthesized(classGen, methodGen); 90 synthesize(classGen, methodGen); 91 } 92 93 /** 94 * Compile expression and update true/false-lists 95 */ 96 public void translateDesynthesized(ClassGenerator classGen, 97 MethodGenerator methodGen) { 98 final ConstantPoolGen cpg = classGen.getConstantPool(); 99 final InstructionList il = methodGen.getInstructionList(); 100 _base.translate(classGen, methodGen); 101 _token.translate(classGen, methodGen); 102 il.append(new INVOKEVIRTUAL(cpg.addMethodref(STRING_CLASS, 103 "indexOf", 104 "("+STRING_SIG+")I"))); 105 _falseList.add(il.append(new IFLT(null))); 106 } 107 }