Package org.apache.bcel.classfile

Class Unknown

java.lang.Object

org.apache.bcel.classfile.Attribute

org.apache.bcel.classfile.Unknown

All Implemented Interfaces:

java.lang.Cloneable, Node

public final class Unknown
extends Attribute

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

See Also:

Attribute, UnknownAttributeReader

Field Summary

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

constant_pool, EMPTY_ARRAY, length, name_index, tag

Constructor Summary

Constructors

Constructor	Description
Unknown(int nameIndex, int length, byte[] bytes, ConstantPool constantPool)	Constructs a new instance for a non-standard attribute.
Unknown(Unknown unknown)	Constructs a new instance from another instance.

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor v)	Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
Attribute	copy(ConstantPool constantPool)	Creates a deep copy of this attribute.
void	dump(java.io.DataOutputStream file)	Dumps unknown bytes to file stream.
byte[]	getBytes()	Gets the data bytes.
java.lang.String	getName()	Gets the name of attribute.
void	setBytes(byte[] bytes)	Sets the data bytes.
java.lang.String	toString()

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Unknown

public Unknown(int nameIndex,
               int length,
               byte[] bytes,
               ConstantPool constantPool)

Constructs a new instance for a non-standard attribute.

Parameters:

nameIndex - Index in constant pool.

length - Content length in bytes.

bytes - Attribute contents.

constantPool - Array of constants.

Unknown

public Unknown(Unknown unknown)

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

Parameters:

unknown - Source.

Method Detail

accept

public void accept(Visitor v)

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.

Specified by:

accept in interface Node

Specified by:

accept in class Attribute

Parameters:

v - Visitor object.

copy

public Attribute copy(ConstantPool constantPool)

Description copied from class: Attribute

Creates a deep copy of this attribute.

Specified by:

copy in class Attribute

Parameters:

constantPool - constant pool to save.

Returns:

deep copy of this attribute.

dump

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

Dumps unknown bytes to file stream.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream.

Throws:

java.io.IOException - Thrown if an I/O error occurs.

getBytes

public byte[] getBytes()

Gets the data bytes.

Returns:

data bytes.

getName

public java.lang.String getName()

Description copied from class: Attribute

Gets the name of attribute.

Overrides:

getName in class Attribute

Returns:

name of attribute.

setBytes

public void setBytes(byte[] bytes)

Sets the data bytes.

Parameters:

bytes - The bytes to set.

toString

public java.lang.String toString()

Overrides:

toString in class Attribute

Returns:

String representation.