org.apache.bcel.generic

Class CodeExceptionGen

java.lang.Object

org.apache.bcel.generic.CodeExceptionGen

All Implemented Interfaces:

Cloneable, InstructionTargeter

public final class CodeExceptionGen
extends Object
implements InstructionTargeter, Cloneable

This class represents an exception handler, i.e., specifies the region where a handler is active and an instruction where the actual handling is done. pool as parameters. Opposed to the JVM specification the end of the handled region is set to be inclusive, i.e. all instructions between start and end are protected including the start and end instructions (handles) themselves. The end of the region is automatically mapped to be exclusive when calling getCodeException(), i.e., there is no difference semantically.

See Also:

MethodGen, CodeException, InstructionHandle

Constructor Summary

Constructors

Constructor and Description
CodeExceptionGen(InstructionHandle startPc, InstructionHandle endPc, InstructionHandle handlerPc, ObjectType catchType) Add an exception handler, i.e., specify region where a handler is active and an instruction where the actual handling is done.

Method Summary

Modifier and Type	Method and Description
Object	clone()
boolean	containsTarget(InstructionHandle ih) Checks whether this targeter targets the specified instruction handle.
ObjectType	getCatchType() Gets the type of the Exception to catch, 'null' for ANY.
CodeException	getCodeException(ConstantPoolGen cp) Get CodeException object. This relies on that the instruction list has already been dumped to byte code or or that the `setPositions' methods has been called for the instruction list.
InstructionHandle	getEndPC()
InstructionHandle	getHandlerPC()
InstructionHandle	getStartPC()
void	setCatchType(ObjectType catchType) Sets the type of the Exception to catch.
void	setEndPC(InstructionHandle end_pc)
void	setHandlerPC(InstructionHandle handler_pc)
void	setStartPC(InstructionHandle start_pc)
String	toString()
void	updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) Replaces the target of this targeter from this old handle to the new handle.

Methods inherited from class java.lang.Object

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

Constructor Detail

CodeExceptionGen

public CodeExceptionGen(InstructionHandle startPc,
                        InstructionHandle endPc,
                        InstructionHandle handlerPc,
                        ObjectType catchType)

Add an exception handler, i.e., specify region where a handler is active and an instruction where the actual handling is done.

Parameters:

startPc - Start of handled region (inclusive)

endPc - End of handled region (inclusive)

handlerPc - Where handling is done

catchType - which exception is handled, null for ANY

Method Detail

getCodeException

public CodeException getCodeException(ConstantPoolGen cp)

Get CodeException object.
This relies on that the instruction list has already been dumped to byte code or or that the `setPositions' methods has been called for the instruction list.

Parameters:

cp - constant pool

setStartPC

public void setStartPC(InstructionHandle start_pc)

setEndPC

public void setEndPC(InstructionHandle end_pc)

setHandlerPC

public void setHandlerPC(InstructionHandle handler_pc)

updateTarget

public void updateTarget(InstructionHandle old_ih,
                         InstructionHandle new_ih)

Description copied from interface: InstructionTargeter

Replaces the target of this targeter from this old handle to the new handle.

Specified by:

updateTarget in interface InstructionTargeter

Parameters:

old_ih - old target, either start or end

new_ih - new target

containsTarget

public boolean containsTarget(InstructionHandle ih)

Description copied from interface: InstructionTargeter

Checks whether this targeter targets the specified instruction handle.

Specified by:

containsTarget in interface InstructionTargeter

Returns:

true, if ih is target of this handler

setCatchType

public void setCatchType(ObjectType catchType)

Sets the type of the Exception to catch. Set 'null' for ANY.

getCatchType

public ObjectType getCatchType()

Gets the type of the Exception to catch, 'null' for ANY.

getStartPC

public InstructionHandle getStartPC()

Returns:

start of handled region (inclusive)

getEndPC

public InstructionHandle getEndPC()

Returns:

end of handled region (inclusive)

getHandlerPC

public InstructionHandle getHandlerPC()

Returns:

start of handler

toString

public String toString()

Overrides:

toString in class Object

clone

public Object clone()

Overrides:

clone in class Object