/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed 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.
*/
/*
* $Id: StringCall.java,v 1.7 2004/02/16 22:24:29 minchau Exp $
*/
package org.apache.xalan.xsltc.compiler;
import java.util.Vector;
import org.apache.bcel.generic.InstructionList;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
*/
final class StringCall extends FunctionCall {
public StringCall(QName fname, Vector arguments) {
super(fname, arguments);
}
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
final int argc = argumentCount();
if (argc > 1) {
ErrorMsg err = new ErrorMsg(ErrorMsg.ILLEGAL_ARG_ERR, this);
throw new TypeCheckError(err);
}
if (argc > 0) {
argument().typeCheck(stable);
}
return _type = Type.String;
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final InstructionList il = methodGen.getInstructionList();
Type targ;
if (argumentCount() == 0) {
il.append(methodGen.loadContextNode());
targ = Type.Node;
}
else {
final Expression arg = argument();
arg.translate(classGen, methodGen);
arg.startIterator(classGen, methodGen);
targ = arg.getType();
}
if (!targ.identicalTo(Type.String)) {
targ.translateTo(classGen, methodGen, Type.String);
}
}
}