org.apache.bcel.classfile

Class Attribute

public abstract class Attribute extends Object implements Cloneable, Node, Serializable

Abstract super class for Attribute objects. Currently the ConstantValue, SourceFile, Code, Exceptiontable, LineNumberTable, LocalVariableTable, InnerClasses and Synthetic attributes are supported. The Unknown attribute stands for non-standard-attributes.

Version: $Id: Attribute.java 386056 2006-03-15 11:31:56Z tcurdt $

Author: M. Dahm

Field Summary
protected ConstantPool	constant_pool
protected int	length
protected int	name_index
static Map	readers
protected byte	tag

Constructor Summary
protected	Attribute(byte tag, int name_index, int length, ConstantPool constant_pool)

Method Summary
abstract void	accept(Visitor v) Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class.
static void	addAttributeReader(String name, AttributeReader r) Add an Attribute reader capable of parsing (user-defined) attributes named "name".
Object	clone() Use copy() if you want to have a deep copy(), i.e., with all references copied correctly.
abstract Attribute	copy(ConstantPool _constant_pool)
void	dump(DataOutputStream file) Dump attribute to file stream in binary format.
ConstantPool	getConstantPool()
int	getLength()
int	getNameIndex()
byte	getTag()
static Attribute	readAttribute(DataInputStream file, ConstantPool constant_pool)
static void	removeAttributeReader(String name) Remove attribute reader
void	setConstantPool(ConstantPool constant_pool)
void	setLength(int length)
void	setNameIndex(int name_index)
String	toString()

Field Detail

constant_pool

protected ConstantPool constant_pool

length

protected int length

name_index

protected int name_index

readers

private static Map readers

tag

protected byte tag

Constructor Detail

Attribute

protected Attribute(byte tag, int name_index, int length, ConstantPool constant_pool)

Method Detail

accept

public abstract void accept(Visitor v)

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.

Parameters: v Visitor object

addAttributeReader

public static void addAttributeReader(String name, AttributeReader r)

Add an Attribute reader capable of parsing (user-defined) attributes named "name". You should not add readers for the standard attributes such as "LineNumberTable", because those are handled internally.

Parameters: name the name of the attribute as stored in the class file r the reader object

clone

public Object clone()

Use copy() if you want to have a deep copy(), i.e., with all references copied correctly.

Returns: shallow copy of this attribute

copy

public abstract Attribute copy(ConstantPool _constant_pool)

Returns: deep copy of this attribute

dump

public void dump(DataOutputStream file)

Dump attribute to file stream in binary format.

Parameters: file Output file stream

Throws: IOException

Parameters: name the name of the attribute as stored in the class file