org.apache.bcel.generic
Class TargetLostException

java.lang.Object
  extended by java.lang.Throwable
      extended by java.lang.Exception
          extended by org.apache.bcel.generic.TargetLostException
All Implemented Interfaces:
Serializable

public final class TargetLostException
extends 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);
       }
     }
 

Version:
$Id: TargetLostException.java 386056 2006-03-15 11:31:56Z tcurdt $
See Also:
InstructionHandle, InstructionList, InstructionTargeter, Serialized Form

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
 

Method Detail

getTargets

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


Copyright © 2002-2006 Apache Software Foundation. All Rights Reserved.