serp.bytecode
Class LineNumber

java.lang.Object
  serp.bytecode.LineNumber

All Implemented Interfaces:

Comparable, BCEntity, InstructionPtr, VisitAcceptor

public class LineNumber
extends Object
implements Comparable, InstructionPtr, BCEntity, VisitAcceptor

A line number corresponds to a sequence of opcodes that map logically to a line of source code.

Author:

Abe White

Method Summary

void	acceptVisit(BCVisitor visit) Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.
int	compareTo(Object other)
ClassLoader	getClassLoader() Return the class loader to use when loading related classes.
Code	getCode() Returns the Code block that owns the Instruction(s) this InstructionPtr points to.
int	getLine() Return source line number.
ConstantPool	getPool() Return the constant pool of the current class.
Project	getProject() Return the project of the current class.
Instruction	getStart() Return the instruction marking the beginning of this line.
int	getStartPc() Return the index into the code byte array at which this line starts.
LineNumberTable	getTable() Line numbers are stored in a LineNumberTable.
boolean	isValid() Return false if this entity has been removed from its parent; in this case the results of any operations on the entity are undefined.
void	replaceTarget(Instruction oldTarget, Instruction newTarget) Replace the given old, likely invalid, target with a new target.
void	setLine(int lineNumber) Set the source line number.
void	setStart(Instruction instruction) Set the Instruction marking the beginning this line.
void	setStartPc(int startPc) Set the index into the code byte array at which this line starts.
void	updateTargets() Use the byte indexes read from the class file to calculate and set references to the target instruction(s) for this ptr.

Methods inherited from class java.lang.Object

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

Method Detail

getTable

public LineNumberTable getTable()

Line numbers are stored in a LineNumberTable.

getLine

public int getLine()

Return source line number.

setLine

public void setLine(int lineNumber)

Set the source line number.

getStart

public Instruction getStart()

Return the instruction marking the beginning of this line.

getStartPc

public int getStartPc()

Return the index into the code byte array at which this line starts.

setStartPc

public void setStartPc(int startPc)

Set the index into the code byte array at which this line starts.

setStart

public void setStart(Instruction instruction)

Set the Instruction marking the beginning this line. The instruction must already be a part of the method.

updateTargets

public void updateTargets()

Description copied from interface: InstructionPtr

Use the byte indexes read from the class file to calculate and set references to the target instruction(s) for this ptr. This method will be called after the byte code has been read in for the first time and before it is written after modification.

Specified by:

updateTargets in interface InstructionPtr

replaceTarget

public void replaceTarget(Instruction oldTarget,
                          Instruction newTarget)

Description copied from interface: InstructionPtr

Replace the given old, likely invalid, target with a new target. The new target Instruction is guaranteed to be in the same code block as this InstructionPtr.

Specified by:

replaceTarget in interface InstructionPtr

getProject

public Project getProject()

Description copied from interface: BCEntity

Return the project of the current class.

Specified by:

getProject in interface BCEntity

getPool

public ConstantPool getPool()

Description copied from interface: BCEntity

Return the constant pool of the current class.

Specified by:

getPool in interface BCEntity

getClassLoader

public ClassLoader getClassLoader()

Description copied from interface: BCEntity

Return the class loader to use when loading related classes.

Specified by:

getClassLoader in interface BCEntity

isValid

public boolean isValid()

Description copied from interface: BCEntity

Return false if this entity has been removed from its parent; in this case the results of any operations on the entity are undefined.

Specified by:

isValid in interface BCEntity

acceptVisit

public void acceptVisit(BCVisitor visit)

Description copied from interface: VisitAcceptor

Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.

Specified by:

acceptVisit in interface VisitAcceptor

compareTo

public int compareTo(Object other)

Specified by:

compareTo in interface Comparable

getCode

public Code getCode()

Description copied from interface: InstructionPtr

Returns the Code block that owns the Instruction(s) this InstructionPtr points to.

Specified by:

getCode in interface InstructionPtr