org.apache.bcel.classfile
Class LineNumber

java.lang.Object
  org.apache.bcel.classfile.LineNumber

All Implemented Interfaces:

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

public final class LineNumber
extends java.lang.Object
implements java.lang.Cloneable, Node, java.io.Serializable

This class represents a (PC offset, line number) pair, i.e., a line number in the source that corresponds to a relative address in the byte code. This is used for debugging purposes.

Version:

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

Author:

M. Dahm

See Also:

LineNumberTable, Serialized Form

Field Summary

private int	line_number
private int	start_pc

Constructor Summary

LineNumber(java.io.DataInputStream file)
Construct object from file stream.

LineNumber(int start_pc, int line_number)

LineNumber(LineNumber 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.
LineNumber	copy()
void	dump(java.io.DataOutputStream file) Dump line number/pc pair to file stream in binary format.
int	getLineNumber()
int	getStartPC()
void	setLineNumber(int line_number)
void	setStartPC(int start_pc)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

start_pc

private int start_pc

line_number

private int line_number

Constructor Detail

LineNumber

public LineNumber(LineNumber c)

Initialize from another object.

LineNumber

LineNumber(java.io.DataInputStream file)
     throws java.io.IOException

Construct object from file stream.

Parameters:

file - Input stream

Throws:

java.io.IOException

LineNumber

public LineNumber(int start_pc,
                  int line_number)

Parameters:

start_pc - Program Counter (PC) corresponds to

line_number - line number in source file

Method Detail

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

Parameters:

v - Visitor object

dump

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

Dump line number/pc pair to file stream in binary format.

Parameters:

file - Output file stream

Throws:

java.io.IOException

getLineNumber

public final int getLineNumber()

Returns:

Corresponding source line

getStartPC

public final int getStartPC()

Returns:

PC in code

setLineNumber

public final void setLineNumber(int line_number)

Parameters:

line_number - the source line number

setStartPC

public final void setStartPC(int start_pc)

Parameters:

start_pc - the pc for this line number

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

String representation

copy

public LineNumber copy()

Returns:

deep copy of this object