bcel API: Class TargetLostException

Class TargetLostException

All Implemented Interfaces:

public final class TargetLostException
extends java.lang.Exception

Thrown by InstructionList.remove() when one or multiple disposed instruction are still being referenced by a InstructionTargeter object. I.e. the InstructionTargeter has to be notified that (one of) the InstructionHandle it is referencing is being removed from the InstructionList and thus not valid anymore. Making this an exception instead of a return value forces the user to handle these case explicitely in a try { ... } catch. The following code illustrates how this may be done:

     try {
	il.delete(start_ih, end_ih);
     } catch(TargetLostException e) {
       InstructionHandle[] targets = e.getTargets();
	 for(int i=0; i < targets.length; i++) {
	   InstructionTargeter[] targeters = targets[i].getTargeters();
	   for(int j=0; j < targeters.length; j++)
	     targeters[j].updateTarget(targets[i], new_target);

$Id:,v 2001/10/29 20:00:27 jvanzyl Exp $
M. Dahm
See Also:
InstructionHandle, InstructionList, InstructionTargeter, Serialized Form

Method Summary
 InstructionHandle[] getTargets()
Methods inherited from class java.lang.Throwable
fillInStackTrace, getLocalizedMessage, getMessage, printStackTrace, printStackTrace, printStackTrace, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail


public InstructionHandle[] getTargets()
list of instructions still being targeted.