private static IEnumerator <EventBean> DistinctEnumeration(IEnumerator <EventBean> source, EventType eventType)
{
EventBeanReader eventBeanReader = null;
if (eventType is EventTypeSPI)
{
eventBeanReader = ((EventTypeSPI)eventType).GetReader();
}
if (eventBeanReader == null)
{
eventBeanReader = new EventBeanReaderDefaultImpl(eventType);
}
if (source != null)
{
var events = new LinkedList <EventBean>();
while (source.MoveNext())
{
events.AddLast(source.Current);
}
if (events.Count <= 1)
{
return(events.GetEnumerator());
}
IList <EventBean> result = EventBeanUtility.GetDistinctByProp(events, eventBeanReader);
return(result.GetEnumerator());
}
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>
/// A <see cref="T:System.Collections.Generic.IEnumerator`1"></see> that can be used to iterate through the collection.
/// </returns>
public IEnumerator <EventBean> GetEnumerator()
{
// Return null if not started
StatementContext.VariableService.SetLocalVersion();
if (_parentView == null)
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
IEnumerator <EventBean> theEnumerator;
if (StatementContext.ContextDescriptor != null)
{
theEnumerator = StatementContext.ContextDescriptor.GetEnumerator(StatementContext.StatementId);
}
else
{
theEnumerator = _parentView.GetEnumerator();
}
if (StatementContext.EpStatementHandle.HasTableAccess)
{
return(GetUnsafeEnumeratorWTableImpl(
theEnumerator, StatementContext.TableExprEvaluatorContext));
}
return(theEnumerator);
}
public IEnumerator <EventBean> GetEnumerator(ISet <MultiKey <EventBean> > joinSet)
{
EventBean[] result;
if (_prototype.OptionalHavingNode == null)
{
if (_orderByProcessor == null)
{
result = ResultSetProcessorUtil.GetSelectJoinEventsNoHaving(_selectExprProcessor, joinSet, true, true, _exprEvaluatorContext);
}
else
{
result = ResultSetProcessorUtil.GetSelectJoinEventsNoHavingWithOrderBy(_selectExprProcessor, _orderByProcessor, joinSet, true, true, _exprEvaluatorContext);
}
}
else
{
if (_orderByProcessor == null)
{
result = ResultSetProcessorUtil.GetSelectJoinEventsHaving(_selectExprProcessor, joinSet, _prototype.OptionalHavingNode, true, true, _exprEvaluatorContext);
}
else
{
result = ResultSetProcessorUtil.GetSelectJoinEventsHavingWithOrderBy(_selectExprProcessor, _orderByProcessor, joinSet, _prototype.OptionalHavingNode, true, true, _exprEvaluatorContext);
}
}
if (result == null)
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
return(((IEnumerable <EventBean>)result).GetEnumerator());
}
public override IEnumerator <EventBean> GetEnumerator()
{
if (_lastResult == null)
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
return(((IEnumerable <EventBean>)_lastResult).GetEnumerator());
}
private IEnumerator <EventBean> ObtainEnumerator()
{
var selectNewEvents = GetSelectListEvents(true, true, false);
return(selectNewEvents != null
? EnumerationHelper <EventBean> .CreateSingletonEnumerator(selectNewEvents[0])
: EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
public override IEnumerator <EventBean> GetEnumerator(Viewable parent)
{
var output = GenerateOutputEventsView(_unboundHelper.Buffer, true, true);
if (output == null)
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
return(((IEnumerable <EventBean>)output).GetEnumerator());
}
public IEnumerator <EventBean> ObtainEnumerator()
{
EventBean[] selectNewEvents = GetSelectListEvents(true, true, false);
if (selectNewEvents != null)
{
return(EnumerationHelper <EventBean> .CreateSingletonEnumerator(selectNewEvents[0]));
}
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
public override IEnumerator <EventBean> GetEnumerator(ISet <MultiKey <EventBean> > joinSet)
{
// Process join results set as a regular join, includes sorting and having-clause filter
UniformPair <EventBean[]> result = ProcessJoinResult(joinSet, CollectionUtil.EMPTY_ROW_SET, true);
if ((result == null) || (result.First == null))
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
return(((IEnumerable <EventBean>)result.First).GetEnumerator());
}
public override IEnumerator <EventBean> GetEnumerator(Viewable parent)
{
if (_orderByProcessor != null)
{
// Pull all events, generate order keys
var eventsPerStream = new EventBean[1];
var events = new List <EventBean>();
var orderKeys = new List <Object>();
var parentEnumerator = parent.GetEnumerator();
if (parentEnumerator.MoveNext() == false)
{
return(CollectionUtil.NULL_EVENT_ITERATOR);
}
do
{
var aParent = parentEnumerator.Current;
eventsPerStream[0] = aParent;
var orderKey = _orderByProcessor.GetSortKey(eventsPerStream, true, ExprEvaluatorContext);
var pair = ProcessViewResultIterator(eventsPerStream);
var result = pair.First;
if (result != null && result.Length != 0)
{
events.Add(result[0]);
}
orderKeys.Add(orderKey);
} while (parentEnumerator.MoveNext());
// sort
var outgoingEvents = events.ToArray();
var orderKeysArr = orderKeys.ToArray();
var orderedEvents = _orderByProcessor.Sort(outgoingEvents, orderKeysArr, ExprEvaluatorContext);
if (orderedEvents == null)
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}
return(((IEnumerable <EventBean>)orderedEvents).GetEnumerator());
}
// Return an iterator that gives row-by-row a result
var transform = new ResultSetProcessorSimpleTransform(this);
return(parent.Select(transform.Transform).GetEnumerator());
}
public IEnumerator <EventBean> GetEnumerator()
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
//return ((IEnumerable<EventBean>) null).GetEnumerator();
}
public override IEnumerator <EventBean> GetEnumerator()
{
return(EnumerationHelper <EventBean> .CreateEmptyEnumerator());
}