public static Iterator<EventBean> getIterator(
JoinExecutionStrategy joinExecutionStrategy,
ResultSetProcessor resultSetProcessor,
Viewable parentView,
boolean distinct) {
Iterator<EventBean> iterator;
EventType eventType;
if (joinExecutionStrategy != null) {
Set<MultiKey<EventBean>> joinSet = joinExecutionStrategy.staticJoin();
iterator = resultSetProcessor.getIterator(joinSet);
eventType = resultSetProcessor.getResultEventType();
} else if (resultSetProcessor != null) {
iterator = resultSetProcessor.getIterator(parentView);
eventType = resultSetProcessor.getResultEventType();
} else {
iterator = parentView.iterator();
eventType = parentView.getEventType();
}
if (!distinct) {
return iterator;
}
return new EventDistinctIterator(iterator, eventType);
}
public Collection<EventBean> getSnapshot(
EPStatementHandle createWindowStmtHandle, Viewable parent) {
createWindowStmtHandle.getStatementLock().acquireReadLock();
try {
Iterator<EventBean> it = parent.iterator();
if (!it.hasNext()) {
return Collections.EMPTY_LIST;
}
ArrayDeque<EventBean> list = new ArrayDeque<EventBean>();
while (it.hasNext()) {
RevisionEventBeanDeclared fullRevision = (RevisionEventBeanDeclared) it.next();
MultiKeyUntyped key = fullRevision.getKey();
RevisionStateDeclared state = statePerKey.get(key);
list.add(state.getLastEvent());
}
return list;
} finally {
createWindowStmtHandle.getStatementLock().releaseReadLock();
}
}
public void setParent(Viewable parent) {
super.setParent(parent);
eventType = parent.getEventType();
}