org.apache.bcel.classfile

Class LineNumber

java.lang.Object

org.apache.bcel.classfile.LineNumber

All Implemented Interfaces:

java.lang.Cloneable, Node

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

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:

$Id$

See Also:

LineNumberTable

Field Summary

Fields

Modifier and Type	Field and Description
private short	line_number number in source file
private short	start_pc Program Counter (PC) corresponds to line

Constructor Summary

Constructors

Constructor and Description
LineNumber(java.io.DataInput file) Construct object from file stream.
LineNumber(int start_pc, int line_number)
LineNumber(LineNumber c) Initialize from another object.

Method Summary

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.
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 short start_pc

Program Counter (PC) corresponds to line

line_number

private short line_number

number in source file

Constructor Detail

LineNumber

public LineNumber(LineNumber c)

Initialize from another object.

Parameters:

c - the object to copy

LineNumber

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

Construct object from file stream.

Parameters:

file - Input stream

Throws:

IOEXception - if an I/O Exception occurs in readUnsignedShort

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:

IOEXception - if an I/O Exception occurs in writeShort

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