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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.DataOutputStream;
import java.io.IOException;

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

This class is derived from the abstract Constant and represents a reference to a module. 
Note: Early access Java 9 support- currently subject to change
See Also:
Constant
Since:
6.1/**
 * This class is derived from the abstract {@link Constant}
 * and represents a reference to a module.
 *
 * <p>Note: Early access Java 9 support- currently subject to change</p>
 *
 * @see     Constant
 * @since 6.1
 */
public final class ConstantModule extends Constant implements ConstantObject {

    private int name_index;


    
Initialize from another object.
/**
     * Initialize from another object.
     */
    public ConstantModule(final ConstantModule c) {
        this(c.getNameIndex());
    }


    
Initialize instance from file data.
Params:
file – Input stream
Throws:
IOException – /**
     * Initialize instance from file data.
     *
     * @param file Input stream
     * @throws IOException
     */
    ConstantModule(final DataInput file) throws IOException {
        this(file.readUnsignedShort());
    }


    
Params:
name_index – Name index in constant pool.  Should refer to a
ConstantUtf8./**
     * @param name_index Name index in constant pool.  Should refer to a
     * ConstantUtf8.
     */
    public ConstantModule(final int name_index) {
        super(Const.CONSTANT_Module);
        this.name_index = name_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.
Params:
v – Visitor object/**
     * 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.visitConstantModule(this);
    }


    
Dump constant module to file stream in binary format.
Params:
file – Output file stream
Throws:
IOException – /**
     * Dump constant module to file stream in binary format.
     *
     * @param file Output file stream
     * @throws IOException
     */
    @Override
    public void dump( final DataOutputStream file ) throws IOException {
        file.writeByte(super.getTag());
        file.writeShort(name_index);
    }


    
Returns:
Name index in constant pool of module name./**
     * @return Name index in constant pool of module name.
     */
    public int getNameIndex() {
        return name_index;
    }


    
Params:
name_index – the name index in the constant pool of this Constant Module/**
     * @param name_index the name index in the constant pool of this Constant Module
     */
    public void setNameIndex( final int name_index ) {
        this.name_index = name_index;
    }


    
Returns:
String object/** @return String object
     */
    @Override
    public Object getConstantValue( final ConstantPool cp ) {
        final Constant c = cp.getConstant(name_index, Const.CONSTANT_Utf8);
        return ((ConstantUtf8) c).getBytes();
    }


    
Returns:
dereferenced string/** @return dereferenced string
     */
    public String getBytes( final ConstantPool cp ) {
        return (String) getConstantValue(cp);
    }


    
Returns:
String representation./**
     * @return String representation.
     */
    @Override
    public String toString() {
        return super.toString() + "(name_index = " + name_index + ")";
    }
}