/*

 * 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.bcel.internal.generic;

/**

 * FCONST - Push 0.0, 1.0 or 2.0, other values cause an exception

 *

 * <PRE>Stack: ... -&gt; ..., </PRE>

 *

 * @version $Id: FCONST.java 1747278 2016-06-07 17:28:43Z britter $

 * @LastModified: Nov 2017

 */

public class FCONST extends Instruction implements ConstantPushInstruction {

    private float value;

    /**

     * Empty constructor needed for the Class.newInstance() statement in

     * Instruction.readInstruction(). Not to be used otherwise.

     */

    FCONST() {

    }

    public FCONST(final float f) {

        super(com.sun.org.apache.bcel.internal.Const.FCONST_0, (short) 1);

        if (f == 0.0) {

            super.setOpcode(com.sun.org.apache.bcel.internal.Const.FCONST_0);

        } else if (f == 1.0) {

            super.setOpcode(com.sun.org.apache.bcel.internal.Const.FCONST_1);

        } else if (f == 2.0) {

            super.setOpcode(com.sun.org.apache.bcel.internal.Const.FCONST_2);

        } else {

            throw new ClassGenException("FCONST can be used only for 0.0, 1.0 and 2.0: " + f);

        }

        value = f;

    }

    @Override

    public Number getValue() {

        return value;

    }

    /** @return Type.FLOAT

     */

    @Override

    public Type getType( final ConstantPoolGen cp ) {

        return Type.FLOAT;

    }

    /**

     * Call corresponding visitor method(s). The order is:

     * Call visitor methods of implemented interfaces first, then

     * call methods according to the class hierarchy in descending order,

     * i.e., the most specific visitXXX() call comes last.

     *

     * @param v Visitor object

     */

    @Override

    public void accept( final Visitor v ) {

        v.visitPushInstruction(this);

        v.visitStackProducer(this);

        v.visitTypedInstruction(this);

        v.visitConstantPushInstruction(this);

        v.visitFCONST(this);

    }

}