//-----------------------------------------------------------------------------
//  Jul 26 2001 P.Murat: STNTUPLE utility routines
//-----------------------------------------------------------------------------
#include "TObject.h"
#include "Experiment/Experiment.hh"
#include "AbsEnv/AbsEnv.hh"
#include "Edm/EventRecord.hh"
#include "TrackingObjects/Storable/CdfTrackColl.hh"
#include "TrackingObjects/Storable/CdfTrackView.hh"

#include <Stntuple/mod/StntupleUtilities.hh>

//_____________________________________________________________________________
Int_t StntupleCreateTrackView(AbsEvent*        Event, 
			      const char*      CollName, 
			      CdfTrackView_h&  ViewHandle) {

  // create track view corresponding to a collection with the given name 'Name'
  // if Name="default", return 'defTracks'
  // if name == 'all', return  'allTracks'

  char  process[100], description[100];

  CdfTrackView::Error ok = CdfTrackView::VIEW_NOT_FOUND;

  StntupleGetProcessName(CollName,process,description);

  if (strcmp(description,"default") == 0) {

					// default track collection has been
					// requested

    ok = CdfTrackView::defTracks(ViewHandle,process);
  }
  else if (strcmp(description,"all") == 0) {

					// all tracks have been requested

    ok = CdfTrackView::allTracks(ViewHandle,process);
  }
  else {
    ViewHandle = new CdfTrackView;
    ViewHandle->set_description("junk");
					// collection with the given name
					// has been requested

    EventRecord::ConstIterator ci( AbsEnv::instance()->theEvent(),
				   "CdfTrackColl" );
    for ( ; ci.is_valid() ; ++ci ) {
      CdfTrackColl_ch chColl( ci );
      if ((chColl->process_name() == "")||(chColl->process_name() == process)){
	if (chColl->description() == description) {
	  const CdfTrackColl::CollType & cont = chColl->contents();
	  for(CdfTrackColl::const_iterator i = cont.begin();i!=cont.end();++i){
	    ViewHandle->contents().push_back(*i);
	  }
	  ok = CdfTrackView::OK;
	  break;
	}
      }
    }
  }
  return (ok == CdfTrackView::OK) ? 0 : -1;
}