classycle.classfile

Class Constant

java.lang.Object

classycle.classfile.Constant

Direct Known Subclasses:

ClassConstant, DoubleConstant, FloatConstant, IntConstant, LongConstant, NameAndTypeConstant, RefConstant, StringConstant, UTF8Constant

public abstract class Constant
extends Object

Abstract super class of all type of constants in the constant pool of a class file.

Author:

Franz-Josef Elmer

Constructor Summary

Constructors

Constructor and Description
Constant(Constant[] pool) Creates an instance.

Method Summary

Methods

Modifier and Type	Method and Description
static Constant[]	extractConstantPool(DataInputStream stream) Extracts the constant pool from the specified data stream of a class file.
Constant	getConstant(int index) Returns the specified constant from the pool.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Constant

public Constant(Constant[] pool)

Creates an instance.

Parameters:

pool - The poole which will be needed to resolve references.

Method Detail

extractConstantPool

public static Constant[] extractConstantPool(DataInputStream stream)
                                      throws IOException

Extracts the constant pool from the specified data stream of a class file.

Parameters:

stream - Input stream of a class file starting at the first byte.

Returns:

extracted array of constants.

Throws:

IOException - in case of reading errors or invalid class file.

getConstant

public Constant getConstant(int index)

Returns the specified constant from the pool.

Parameters:

index - Index of requested constant.