org.apache.bcel.classfile

Class StackMap

java.lang.Object

org.apache.bcel.classfile.Attribute

org.apache.bcel.classfile.StackMap

All Implemented Interfaces:

Serializable, Cloneable, Node

public final class StackMap
extends Attribute
implements Node

This class represents a stack map attribute used for preverification of Java classes for the Java 2 Micro Edition (J2ME). This attribute is used by the KVM and contained within the Code attribute of a method. See CLDC specification §5.3.1.2

Version:

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

Author:

M. Dahm

See Also:

Code, StackMapEntry, StackMapType, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private StackMapEntry[]	map
private int	map_length

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

constant_pool, length, name_index, tag

Constructor Summary

Constructors

Constructor and Description
StackMap(int name_index, int length, DataInputStream file, ConstantPool constant_pool) Construct object from file stream.
StackMap(int name_index, int length, StackMapEntry[] map, ConstantPool constant_pool)

Method Summary

Methods

Modifier and Type	Method and 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(DataOutputStream file) Dump line number table attribute to file stream in binary format.
int	getMapLength()
StackMapEntry[]	getStackMap()
void	setStackMap(StackMapEntry[] map)
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

map_length

private int map_length

map

private StackMapEntry[] map

Constructor Detail

StackMap

public StackMap(int name_index,
        int length,
        StackMapEntry[] map,
        ConstantPool constant_pool)

StackMap

StackMap(int name_index,
        int length,
        DataInputStream file,
        ConstantPool constant_pool)
   throws IOException

Construct object from file stream.

Parameters:

name_index - Index of name

length - Content length in bytes

file - Input stream

constant_pool - Array of constants

Throws:

IOException

Method Detail

dump

public final void dump(DataOutputStream file)
                throws IOException

Dump line number table attribute to file stream in binary format.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream

Throws:

IOException

getStackMap

public final StackMapEntry[] getStackMap()

Returns:

Array of stack map entries

setStackMap

public final void setStackMap(StackMapEntry[] map)

Parameters:

map - Array of stack map entries

toString

public final 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

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

getMapLength

public final int getMapLength()