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/*

 * 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

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 *      http://www.apache.org/licenses/LICENSE-2.0

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 *  distributed under the License is distributed on an "AS IS" BASIS,

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package com.sun.org.apache.bcel.internal.classfile;

import java.io.DataInput;

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 dynamically computed constant.

 *

 * @see     Constant

 * @see  <a href="https://bugs.openjdk.java.net/secure/attachment/74618/constant-dynamic.html">

 * Change request for JEP 309</a>

 * @since 6.3

 */

public final class ConstantDynamic extends ConstantCP {

    /**

     * Initialize from another object.

     */

    public ConstantDynamic(final ConstantDynamic c) {

        this(c.getBootstrapMethodAttrIndex(), c.getNameAndTypeIndex());

    }

    /**

     * Initialize instance from file data.

     *

     * @param file Input stream

     * @throws IOException

     */

    ConstantDynamic(final DataInput file) throws IOException {

        this(file.readShort(), file.readShort());

    }

    public ConstantDynamic(final int bootstrap_method_attr_index, final int name_and_type_index) {

        super(Const.CONSTANT_Dynamic, bootstrap_method_attr_index, name_and_type_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.visitConstantDynamic(this);

    }

    /**

     * @return Reference (index) to bootstrap method this constant refers to.

     *

     * Note that this method is a functional duplicate of getClassIndex

     * for use by ConstantInvokeDynamic.

     * @since 6.0

     */

    public int getBootstrapMethodAttrIndex() {

        return super.getClassIndex();  // AKA bootstrap_method_attr_index

    }

    /**

     * @return String representation

     */

    @Override

    public String toString() {

        return super.toString().replace("class_index", "bootstrap_method_attr_index");

    }

}