/**
* Read all indexes that for the given event type that match the given constraint from the given
* typed event repo This method will attempt to find the best possible way of retrieving index
* data given the indexes that exists in this {@link Indexing}
*
* @param eventTypeId {@link Long} event type id
* @param constraint {@link FieldConstraint}
* @param typedEventRepo {@link TypedEventRepo} where event data can be read from
* @return
*/
public Iterable<EventId> readIndicies(
EventTypeId eventTypeId, FieldConstraint constraint, TypedEventRepo typedEventRepo) {
if (constraint.hasConstraint()) {
EventFieldId eventFieldId = new EventFieldId(eventTypeId, constraint.getFieldName());
if (eventFieldIndexing.isIndexing(eventFieldId)) {
return eventFieldIndexing.getIterable(eventFieldId, constraint);
} else {
return new FallbackFilteringEventIdIterable(
eventIndexing.getIndexEntryIterable(eventTypeId), constraint, typedEventRepo);
}
} else {
return eventIndexing.getIndexEntryIterable(eventTypeId);
}
}
@Override
public boolean hasNext() {
while (next == null && pos < entries.size()) {
EventFieldEntry maybeNext = entries.get(pos++);
if (fieldConstraint.accepts(maybeNext.getFieldValue())) {
next = maybeNext;
}
}
return next != null;
}