org.apache.bcel.classfile
Class Unknown

java.lang.Object
  org.apache.bcel.classfile.Attribute
      org.apache.bcel.classfile.Unknown

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Node

public final class Unknown
extends Attribute

This class represents a reference to an unknown (i.e., application-specific) attribute of a class. It is instantiated from the Attribute.readAttribute() method. Applications that need to read in application-specific attributes should create an AttributeReader implementation and attach it via Attribute.addAttributeReader.

Version:

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

Author:

M. Dahm

See Also:

Attribute, AttributeReader, Serialized Form

Field Summary

private byte[]	bytes
private java.lang.String	name
private static java.util.Map	unknown_attributes

Fields inherited from class org.apache.bcel.classfile.Attribute

constant_pool, length, name_index, tag

Constructor Summary

Unknown(int name_index, int length, byte[] bytes, ConstantPool constant_pool)
Create a non-standard attribute.

Unknown(int name_index, int length, java.io.DataInputStream file, ConstantPool constant_pool)
Construct object from file stream.

Unknown(Unknown c)
Initialize from another object.

Method Summary

void	accept(Visitor v) Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class.
Attribute	copy(ConstantPool _constant_pool)
void	dump(java.io.DataOutputStream file) Dump unknown bytes to file stream.
byte[]	getBytes()
java.lang.String	getName()
(package private) static Unknown[]	getUnknownAttributes()
void	setBytes(byte[] bytes)
java.lang.String	toString()

Methods inherited from class org.apache.bcel.classfile.Attribute

addAttributeReader, clone, getConstantPool, getLength, getNameIndex, getTag, readAttribute, removeAttributeReader, setConstantPool, setLength, setNameIndex

Methods inherited from class java.lang.Object

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

Field Detail

bytes

private byte[] bytes

name

private java.lang.String name

unknown_attributes

private static java.util.Map unknown_attributes

Constructor Detail

Unknown

public Unknown(Unknown c)

Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical copy.

Unknown

public Unknown(int name_index,
               int length,
               byte[] bytes,
               ConstantPool constant_pool)

Create a non-standard attribute.

Parameters:

name_index - Index in constant pool

length - Content length in bytes

bytes - Attribute contents

constant_pool - Array of constants

Unknown

Unknown(int name_index,
        int length,
        java.io.DataInputStream file,
        ConstantPool constant_pool)
  throws java.io.IOException

Construct object from file stream.

Parameters:

name_index - Index in constant pool

length - Content length in bytes

file - Input stream

constant_pool - Array of constants

Throws:

java.io.IOException

Method Detail

getUnknownAttributes

static Unknown[] getUnknownAttributes()

Returns:

array of unknown attributes, but just one for each kind.

accept

public 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.

Specified by:

accept in interface Node

Specified by:

accept in class Attribute

Parameters:

v - Visitor object

dump

public final void dump(java.io.DataOutputStream file)
                throws java.io.IOException

Dump unknown bytes to file stream.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream

Throws:

java.io.IOException

getBytes

public final byte[] getBytes()

Returns:

data bytes.

getName

public final java.lang.String getName()

Returns:

name of attribute.

setBytes

public final void setBytes(byte[] bytes)

Parameters:

bytes - the bytes to set

toString

public final java.lang.String toString()

Overrides:

toString in class Attribute

Returns:

String representation.

copy

public Attribute copy(ConstantPool _constant_pool)

Specified by:

copy in class Attribute

Returns:

deep copy of this attribute