EntityManager em = ((ActivityStreamServiceImpl) activityStreamService).getEntityManager();
Query query;
switch (queryType) {
case ACTIVITY_STREAM_FOR_ACTOR:
RelationshipService relationshipService = Framework.getLocalService(RelationshipService.class);
List<String> actors = new ArrayList<String>();
for (String relationshipKind : relationshipKinds) {
actors.addAll(relationshipService.getTargetsOfKind(actor,
RelationshipKind.fromString(relationshipKind)));
}
if (actors.isEmpty()) {
return new ActivitiesListImpl();
}