/*
 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * 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, Santiago Pericas-Geertsen, Morten Jorgensen
@LastModified: Oct 2017
/** * @author Jacek Ambroziak * @author Santiago Pericas-Geertsen * @author Morten Jorgensen * @LastModified: Oct 2017 */
final class StartsWithCall extends FunctionCall { private Expression _base = null; private Expression _token = null;
Create a starts-with() call - two arguments, both strings
/** * 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
/** * 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
/** * 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"))); } }