How to use

hasNext

method

in

com.activequant.domainmodel.streaming.StreamEventIterator

public boolean moreDataInPipe() {
  for (StreamEventIterator<StreamEvent> it : iterators)
    if (it.hasNext())
      return true;
  return false;
}

public FastStreamer(  StreamEventIterator<StreamEvent>[] it) {
  this.iterators = it;
  // initialize also the headstart data. 
  containers =  new FastStreamEventContainer[it.length]; 
  for (int i = 0; i < it.length; i++) {
    if (it[i].hasNext()) {
      
      StreamEvent payload = it[i].next();
      if(containers[i] == null)
        containers[i] = new FastStreamEventContainer(i);
      FastStreamEventContainer fs = containers[i];
      fs.streamEvent=payload;
      fastQueue.add(fs);
    }
  }
  // sort all events once. 
  Collections.sort(fastQueue);
}

/**
 * Fetches the next stream event from the pipe. 
 * @return
 */
public StreamEvent getOneFromPipes()
{
  StreamEvent ret = null;
  if(!fastQueue.isEmpty()){
    FastStreamEventContainer event = fastQueue.get(0);
    if(event==null)return null;
    fastQueue.remove(0);
    ret = event.streamEvent;
    if(iterators[event.internalStreamId].hasNext())
    {
      StreamEvent payload = iterators[event.internalStreamId].next();
      FastStreamEventContainer newEvent = new FastStreamEventContainer(event.internalStreamId); 						
      newEvent.streamEvent=payload;                
      fastQueue.add(newEvent);
      Collections.sort(fastQueue);
      
      //
      // dumpQueue();
      
    }
    // log.info(ret.getTimeStamp().getNanoseconds() + " -  " + ret.getTimeStamp().getDate() + " - " + ret.toString());
  }
  return ret; 
}