event_looping_cint.C

#include <vector>
#include <TFile.h>
using namespace std;

#if defined(__CINT__) && !defined(__MAKECINT__)
class loadFWLite {
public:
  loadFWLite() {
    gSystem->Load("libFWCoreFWLite");
    FWLiteEnabler::enable();
  }
};

static loadFWLite lfw;
#endif

#include "DataFormats/FWLite/interface/Handle.h"

#if !defined(__CINT__) && !defined(__MAKECINT__)
#include "DataFormats/TestObjects/interface/ThingCollection.h"
#endif

int event_looping_cint() {
  TFile f("good_a.root");
  fwlite::Event e(&f);

  int i = 0;
  int returnValue = 0;
  for (; e.isValid(); ++e, ++i) {
    fwlite::Handle<vector<edmtest::Thing> > pThing;
    //pThing.getByLabel(e,"Thing","","TEST"); //WORKS
    pThing.getByLabel(e, "Thing");

    for (int i = 0; i != pThing.ref().size(); ++i) {
      cout << pThing.ref().at(i).a << " ";
    }
    cout << endl;
  }
  if (i == 0) {
    cout << "First loop failed!" << endl;
    returnValue = 1;
  }
  e.toBegin();

  i = 0;
  for (; e; ++e, ++i) {
  }

  if (i == 0) {
    cout << "Second loop failed!" << endl;
    returnValue = 1;
  }

  i = 0;
  for (e.toBegin(); !e.atEnd(); ++e, ++i) {
    fwlite::Handle<vector<edmtest::Thing> > pThing;
    //pThing.getByLabel(e,"Thing","","TEST"); //WORKS
    pThing.getByLabel(e, "Thing");

    for (int i = 0; i != pThing.ref().size(); ++i) {
      cout << pThing.ref().at(i).a << " ";
    }
    cout << endl;

    //DOES NOT WORK
    //for(vector<edmtest::Thing>::const_iterator it = pThing.data()->begin(); it != pThing.data()->end();++it) {
    //   cout <<(*it).a<<endl;
    //}
  }
  if (i == 0) {
    cout << "Third loop failed!" << endl;
    returnValue = 1;
  }
  return returnValue;
}