1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * @LastModified: Oct 2017 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 com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; 25 import com.sun.org.apache.bcel.internal.generic.IFLT; 26 import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; 27 import com.sun.org.apache.bcel.internal.generic.InstructionList; 28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; 29 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; 30 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; 31 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; 32 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; 33 import java.util.List; 34 35 /** 36 * @author Jacek Ambroziak 37 * @author Santiago Pericas-Geertsen 38 * @author Morten Jorgensen 39 */ 40 final class ContainsCall extends FunctionCall { 41 42 private Expression _base = null; 43 private Expression _token = null; 44 45 /** 46 * Create a contains() call - two arguments, both strings 47 */ 48 public ContainsCall(QName fname, List<Expression> arguments) { 49 super(fname, arguments); 50 } 51 52 /** 53 * This XPath function returns true/false values 54 */ 55 public boolean isBoolean() { 56 return true; 57 } 58 59 /** 60 * Type check the two parameters for this function 61 */ 62 public Type typeCheck(SymbolTable stable) throws TypeCheckError { 63 64 // Check that the function was passed exactly two arguments 65 if (argumentCount() != 2) { 66 throw new TypeCheckError(ErrorMsg.ILLEGAL_ARG_ERR, getName(), this); 67 } 68 69 // The first argument must be a String, or cast to a String 70 _base = argument(0); 71 Type baseType = _base.typeCheck(stable); 72 if (baseType != Type.String) 73 _base = new CastExpr(_base, Type.String); 74 75 // The second argument must also be a String, or cast to a String 76 _token = argument(1); 77 Type tokenType = _token.typeCheck(stable); 78 if (tokenType != Type.String) 79 _token = new CastExpr(_token, Type.String); 80 81 return _type = Type.Boolean; 82 } 83 84 /** 85 * Compile the expression - leave boolean expression on stack 86 */ 87 public void translate(ClassGenerator classGen, MethodGenerator methodGen) { 88 translateDesynthesized(classGen, methodGen); 89 synthesize(classGen, methodGen); 90 } 91 92 /** 93 * Compile expression and update true/false-lists 94 */ 95 public void translateDesynthesized(ClassGenerator classGen, 96 MethodGenerator methodGen) { 97 final ConstantPoolGen cpg = classGen.getConstantPool(); 98 final InstructionList il = methodGen.getInstructionList(); 99 _base.translate(classGen, methodGen); 100 _token.translate(classGen, methodGen); 101 il.append(new INVOKEVIRTUAL(cpg.addMethodref(STRING_CLASS, 102 "indexOf", 103 "("+STRING_SIG+")I"))); 104 _falseList.add(il.append(new IFLT(null))); 105 } 106 }