/*

 * 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.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

 * @LastModified: Oct 2017

 */

final class StringCall extends FunctionCall {

    public StringCall(QName fname, List<Expression> 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);

        }

    }

}