package org.lcsim.users.jeremym;
   
   import org.lcsim.event.CalorimeterHit;
   import org.lcsim.event.EventHeader;
   import org.lcsim.util.aida.AIDA;
   
   /**
    * This is an example Driver that sums hit energies in the ECAL barrel.
    * @author Jeremy McCormick <jeremym@slac.stanford.edu>
   */
  public class CalorimeterHitExampleDriver {
      
      static String collectionName = "EcalBarrelHits";
      AIDA aida = AIDA.defaultInstance();
          
      public void process(EventHeader event) {
          double totalEnergy = 0.;
          for (CalorimeterHit hit : event.get(CalorimeterHit.class, collectionName)) {
              totalEnergy += hit.getCorrectedEnergy();
              aida.cloud1D("EcalBarrel Energy").fill(totalEnergy);
          }        
      }
  }