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Class TargetLostException  view TargetLostException download

  extended byjava.lang.Throwable
      extended byjava.lang.Exception
          extended byorg.apache.bcel.generic.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: 386056 2006-03-15 11:31:56Z tcurdt $

Nested Class Summary
Nested classes inherited from class java.lang.Throwable
Field Summary
private  InstructionHandle[] targets
Fields inherited from class java.lang.Exception
Fields inherited from class java.lang.Throwable
Constructor Summary
(package private) TargetLostException(InstructionHandle[] t, java.lang.String mesg)
Method Summary
 InstructionHandle[] getTargets()
Methods inherited from class java.lang.Throwable
fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail


private InstructionHandle[] targets
Constructor Detail


TargetLostException(InstructionHandle[] t,
                    java.lang.String mesg)
Method Detail


public InstructionHandle[] getTargets()