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package com.sun.org.apache.bcel.internal.generic;


Thrown by InstructionList.remove() when one or multiple disposed instructions
are still being referenced by an 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) {
        for (InstructionHandle target : e.getTargets()) {
            for (InstructionTargeter targeter : target.getTargeters()) {
                targeter.updateTarget(target, new_target);
            }
        }
    }



See Also:
Version:$Id$
/**
 * Thrown by InstructionList.remove() when one or multiple disposed instructions
 * are still being referenced by an 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.
 *
 * <p>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:</p>
 *
 * <PRE>
 *     ...
 *     try {
 *         il.delete(start_ih, end_ih);
 *     } catch(TargetLostException e) {
 *         for (InstructionHandle target : e.getTargets()) {
 *             for (InstructionTargeter targeter : target.getTargeters()) {
 *                 targeter.updateTarget(target, new_target);
 *             }
 *         }
 *     }
 * </PRE>
 *
 * @see InstructionHandle
 * @see InstructionList
 * @see InstructionTargeter
 * @version $Id$
 */
public final class TargetLostException extends Exception {

    private static final long serialVersionUID = -6857272667645328384L;
    private final InstructionHandle[] targets;


    TargetLostException(final InstructionHandle[] t, final String mesg) {
        super(mesg);
        targets = t;
    }


    
Returns:list of instructions still being targeted.
/**
     * @return list of instructions still being targeted.
     */
    public InstructionHandle[] getTargets() {
        return targets;
    }
}