/**
* Sends an event to the registered sessions.
*
* @param ctx query context
* @return event result
* @throws QueryException query exception
*/
private Item event(final QueryContext ctx) throws QueryException {
final byte[] name = checkStr(expr[0], ctx);
final ArrayOutput ao = new ArrayOutput();
try {
// run serialization
final Serializer ser = Serializer.get(ao, ctx.serProp(true));
final ValueIter ir = ctx.value(expr[1]).iter();
for (Item it; (it = ir.next()) != null; ) it.serialize(ser);
ser.close();
} catch (final SerializerException ex) {
throw ex.getCause(input);
} catch (final IOException ex) {
SERANY.thrw(input, ex);
}
// throw exception if event is unknown
if (!ctx.context.events.notify(ctx.context, name, ao.toArray())) {
NOEVENT.thrw(input, name);
}
return null;
}
