/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * 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.classfile;

import java.io.DataInput;

import java.io.DataOutputStream;

import java.io.IOException;

import com.sun.org.apache.bcel.internal.Const;

/**

 * This class is derived from the abstract {@link Constant}

 * and represents a reference to a method handle.

 *

 * @see     Constant

 * @since 6.0

 */

public final class ConstantMethodHandle extends Constant {

    private int reference_kind;

    private int reference_index;

    /**

     * Initialize from another object.

     */

    public ConstantMethodHandle(final ConstantMethodHandle c) {

        this(c.getReferenceKind(), c.getReferenceIndex());

    }

    /**

     * Initialize instance from file data.

     *

     * @param file Input stream

     * @throws IOException

     */

    ConstantMethodHandle(final DataInput file) throws IOException {

        this(file.readUnsignedByte(), file.readUnsignedShort());

    }

    public ConstantMethodHandle(final int reference_kind, final int reference_index) {

        super(Const.CONSTANT_MethodHandle);

        this.reference_kind = reference_kind;

        this.reference_index = reference_index;

    }

    /**

     * Called by objects that are traversing the nodes of the tree implicitly

     * defined by the contents of a Java class. I.e., the hierarchy of methods,

     * fields, attributes, etc. spawns a tree of objects.

     *

     * @param v Visitor object

     */

    @Override

    public void accept( final Visitor v ) {

        v.visitConstantMethodHandle(this);

    }

    /**

     * Dump method kind and index to file stream in binary format.

     *

     * @param file Output file stream

     * @throws IOException

     */

    @Override

    public final void dump( final DataOutputStream file ) throws IOException {

        file.writeByte(super.getTag());

        file.writeByte(reference_kind);

        file.writeShort(reference_index);

    }

    public int getReferenceKind() {

        return reference_kind;

    }

    public void setReferenceKind(final int reference_kind) {

        this.reference_kind = reference_kind;

    }

    public int getReferenceIndex() {

        return reference_index;

    }

    public void setReferenceIndex(final int reference_index) {

        this.reference_index = reference_index;

    }

    /**

     * @return String representation

     */

    @Override

    public final String toString() {

        return super.toString() + "(reference_kind = " + reference_kind +

                ", reference_index = " + reference_index + ")";

    }

}