public void cancelActivation(
final LeftTuple leftTuple,
final PropagationContext context,
final InternalWorkingMemory workingMemory,
final Activation activation,
final TerminalNode rtn) {
AgendaItem item = (AgendaItem) activation;
item.removeAllBlockersAndBlocked(this);
if (isDeclarativeAgenda() && activation.getFactHandle() == null) {
// This a control rule activation, nothing to do except update counters. As control rules are
// not in agenda-groups etc.
return;
} else {
// we are retracting an actual Activation, so also remove it and it's handle from the WM.
removeActivation(item);
}
if (activation.isQueued()) {
// on fact expiration, we don't remove the activation, but let it fire
if (context.getType() == PropagationContext.EXPIRATION
&& context.getFactHandleOrigin() != null) {
} else {
activation.remove();
if (activation.getActivationGroupNode() != null) {
activation.getActivationGroupNode().getActivationGroup().removeActivation(activation);
}
leftTuple.decreaseActivationCountForEvents();
((EventSupport) workingMemory)
.getAgendaEventSupport()
.fireActivationCancelled(activation, workingMemory, MatchCancelledCause.WME_MODIFY);
}
}
if (item.getActivationUnMatchListener() != null) {
item.getActivationUnMatchListener().unMatch(workingMemory.getKnowledgeRuntime(), item);
}
TruthMaintenanceSystemHelper.removeLogicalDependencies(activation, context, rtn.getRule());
}
private void putConstraintUndoListener(
RuleContext kcontext, int scoreLevel, ConstraintUndoListener constraintUndoListener) {
AgendaItem<?> agendaItem = (AgendaItem) kcontext.getMatch();
ActivationUnMatchListener activationUnMatchListener = agendaItem.getActivationUnMatchListener();
if (activationUnMatchListener != null) {
MultiLevelActivationUnMatchListener multiLevelActivationUnMatchListener =
(MultiLevelActivationUnMatchListener) activationUnMatchListener;
multiLevelActivationUnMatchListener.overwriteMatch(scoreLevel, constraintUndoListener);
} else {
MultiLevelActivationUnMatchListener multiLevelActivationUnMatchListener =
new MultiLevelActivationUnMatchListener(scoreLevel, constraintUndoListener);
agendaItem.setActivationUnMatchListener(multiLevelActivationUnMatchListener);
}
}
