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 (i.e., 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

Modifier and Type	Field	Description
private byte[]	bytes
private java.lang.String	name
private static java.util.Map<java.lang.String,Unknown>	unknown_attributes

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

constant_pool, length, name_index, tag

Constructor Summary

Constructors

Constructor	Description
Unknown(int name_index, int length, byte[] bytes, ConstantPool constant_pool)	Create a non-standard attribute.
Unknown(int name_index, int length, java.io.DataInput input, ConstantPool constant_pool)	Construct object from input stream.
Unknown(Unknown c)	Initialize from another object.

Method Summary

Modifier and Type	Method	Description
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, 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

Field Detail

bytes

private byte[] bytes

name

private final java.lang.String name

unknown_attributes

private static final java.util.Map<java.lang.String,Unknown> 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.DataInput input,
        ConstantPool constant_pool)
 throws java.io.IOException

Construct object from input stream.

Parameters:

name_index - Index in constant pool

length - Content length in bytes

input - 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 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 byte[] getBytes()

Returns:

data bytes.

getName

public java.lang.String getName()

Overrides:

getName in class Attribute

Returns:

name of attribute.

setBytes

public void setBytes(byte[] bytes)

Parameters:

bytes - the bytes to set

toString

public 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