| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * @LastModified: Oct 2017 |
| */ |
| /* |
| * 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.xalan.internal.xsltc.compiler; |
| |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; |
| import com.sun.org.apache.bcel.internal.generic.InstructionList; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; |
| import java.util.List; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| final class StartsWithCall extends FunctionCall { |
| |
| private Expression _base = null; |
| private Expression _token = null; |
| |
| /** |
| * Create a starts-with() call - two arguments, both strings |
| */ |
| public StartsWithCall(QName fname, List<Expression> arguments) { |
| super(fname, arguments); |
| } |
| |
| /** |
| * Type check the two parameters for this function |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| |
| // Check that the function was passed exactly two arguments |
| if (argumentCount() != 2) { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.ILLEGAL_ARG_ERR, |
| getName(), this); |
| throw new TypeCheckError(err); |
| } |
| |
| // The first argument must be a String, or cast to a String |
| _base = argument(0); |
| Type baseType = _base.typeCheck(stable); |
| if (baseType != Type.String) |
| _base = new CastExpr(_base, Type.String); |
| |
| // The second argument must also be a String, or cast to a String |
| _token = argument(1); |
| Type tokenType = _token.typeCheck(stable); |
| if (tokenType != Type.String) |
| _token = new CastExpr(_token, Type.String); |
| |
| return _type = Type.Boolean; |
| } |
| |
| /** |
| * Compile the expression - leave boolean expression on stack |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| _base.translate(classGen, methodGen); |
| _token.translate(classGen, methodGen); |
| il.append(new INVOKEVIRTUAL(cpg.addMethodref(STRING_CLASS, |
| "startsWith", |
| "("+STRING_SIG+")Z"))); |
| } |
| } |