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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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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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 {@link Constant}
* and represents a reference to a (external) class.
*
* @see Constant
*/
public final class ConstantClass extends Constant implements ConstantObject {
private int name_index; // Identical to ConstantString except for the name
/**
* Initialize from another object.
*/
public ConstantClass(final ConstantClass c) {
this(c.getNameIndex());
}
/**
* Constructs an instance from file data.
*
* @param dataInput Input stream
* @throws IOException if an I/O error occurs reading from the given {@code dataInput}.
*/
ConstantClass(final DataInput dataInput) throws IOException {
this(dataInput.readUnsignedShort());
}
/**
* @param name_index Name index in constant pool. Should refer to a
* ConstantUtf8.
*/
public ConstantClass(final int name_index) {
super(Const.CONSTANT_Class);
this.name_index = name_index;
}
/**
* Called by objects that are traversing the nodes of the tree implicitely
* 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.visitConstantClass(this);
}
/**
* Dumps constant class to file stream in binary format.
*
* @param file Output file stream
* @throws IOException if an I/O error occurs writing to the DataOutputStream.
*/
@Override
public final void dump( final DataOutputStream file ) throws IOException {
file.writeByte(super.getTag());
file.writeShort(name_index);
}
/**
* @return Name index in constant pool of class name.
*/
public final int getNameIndex() {
return name_index;
}
/**
* @param name_index the name index in the constant pool of this Constant Class
*/
public final void setNameIndex( final int name_index ) {
this.name_index = name_index;
}
/** @return String object
*/
@Override
public Object getConstantValue( final ConstantPool cp ) {
final Constant c = cp.getConstant(name_index, Const.CONSTANT_Utf8);
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