Package 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	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	Description
Object	clone()
boolean	containsTarget(InstructionHandle ih)	Tests 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)	Gets CodeException object. This relies on that the instruction list has already been dumped to byte code 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 endPc)
void	setHandlerPC(InstructionHandle handlerPc)
void	setStartPC(InstructionHandle startPc)
String	toString()
void	updateTarget(InstructionHandle oldIh, InstructionHandle newIh)	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 Details

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 Details

clone

public Object clone()

Overrides:

clone in class Object

containsTarget

public boolean containsTarget(InstructionHandle ih)

Description copied from interface: InstructionTargeter

Tests whether this targeter targets the specified instruction handle.

Specified by:

containsTarget in interface InstructionTargeter

Parameters:

ih - the instruction handle to test.

Returns:

true, if ih is target of this handler

getCatchType

public ObjectType getCatchType()

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

getCodeException

public CodeException getCodeException(ConstantPoolGen cp)

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

Parameters:

cp - constant pool

getEndPC

public InstructionHandle getEndPC()

Returns:

end of handled region (inclusive)

getHandlerPC

public InstructionHandle getHandlerPC()

Returns:

start of handler

getStartPC

public InstructionHandle getStartPC()

Returns:

start of handled region (inclusive)

setCatchType

public void setCatchType(ObjectType catchType)

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

setEndPC

public void setEndPC(InstructionHandle endPc)

setHandlerPC

public void setHandlerPC(InstructionHandle handlerPc)

setStartPC

public void setStartPC(InstructionHandle startPc)

toString

public String toString()

Overrides:

toString in class Object

updateTarget

public void updateTarget(InstructionHandle oldIh,
 InstructionHandle newIh)

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:

oldIh - old target, either start or end

newIh - new target