public override void MatchFound(
EventBean theEvent,
ICollection<FilterHandleCallback> allStmtMatches)
{
// not receiving the remaining matches simply means we evaluate the event
if (allStmtMatches == null) {
base.MatchFound(theEvent, null);
return;
}
EvalFilterConsumptionHandler handler = EvalFilterNode.Context.ConsumptionHandler;
ProcessMatches(handler, theEvent, allStmtMatches);
}
private static void ProcessMatches(
EvalFilterConsumptionHandler handler,
EventBean theEvent,
ICollection<FilterHandleCallback> allStmtMatches)
{
// ignore all other callbacks for the same event
if (handler.LastEvent == theEvent) {
return;
}
handler.LastEvent = theEvent;
// evaluate consumption for all same-pattern filters
ArrayDeque<FilterHandleCallback> matches = new ArrayDeque<FilterHandleCallback>();
int currentConsumption = int.MinValue;
foreach (FilterHandleCallback callback in allStmtMatches) {
if (!(callback is EvalFilterStateNodeConsume)) {
continue;
}
EvalFilterStateNodeConsume node = (EvalFilterStateNodeConsume) callback;
int? consumption = node.EvalFilterNode.FactoryNode.ConsumptionLevel;
if (consumption == null) {
consumption = 0;
}
if (consumption > currentConsumption) {
matches.Clear();
currentConsumption = consumption.Value;
}
if (consumption == currentConsumption) {
matches.Add(callback);
}
}
// execute matches
foreach (FilterHandleCallback match in matches) {
match.MatchFound(theEvent, null);
}
}