public static ICollection<EventBean> GetDistinctByProp(
ArrayDeque<EventBean> events,
EventPropertyValueGetter getter)
{
if (events == null || events.IsEmpty()) {
return new EventBean[0];
}
if (events.Count < 2) {
return events;
}
var map = new LinkedHashMap<object, EventBean>();
if (events.First is NaturalEventBean) {
foreach (var theEvent in events) {
var inner = ((NaturalEventBean) theEvent).OptionalSynthetic;
var key = getter.Get(inner);
map[key] = inner;
}
}
else {
foreach (var theEvent in events) {
var key = getter.Get(theEvent);
map[key] = theEvent;
}
}
return map.Values.ToArray();
}
/// <summary>
/// Returns the distinct events by properties.
/// </summary>
/// <param name="events">to inspect</param>
/// <param name="getter">for retrieving properties</param>
/// <returns>distinct events</returns>
public static EventBean[] GetDistinctByProp(
EventBean[] events,
EventPropertyValueGetter getter)
{
if (events == null || events.Length < 2 || getter == null) {
return events;
}
var map = new Dictionary<object, EventBean>();
if (events[0] is NaturalEventBean) {
foreach (var theEvent in events) {
var inner = ((NaturalEventBean) theEvent).OptionalSynthetic;
var key = getter.Get(inner);
map[key] = theEvent;
}
}
else {
foreach (var theEvent in events) {
var key = getter.Get(theEvent);
map[key] = theEvent;
}
}
return map.Values.ToArray();
}
public object Eval(
EventBean @event,
ExprEvaluatorContext ctx)
{
return(_getter.Get(@event));
}