#include <TString.h>            // sigh...
#include <TSelector.h>
#include <TFile.h>
#include <TChain.h>
#include <iostream>


class MySelector
   : public TSelector
{
   public:

      MySelector() {}
      virtual ~MySelector() {}

      virtual void Begin( TTree* tree )
      {
         if ( tree == 0 ) { return; }
         fTree = tree;
         fTree->SetBranchAddress( "foo", &f_foo );
      }

      virtual Bool_t Notify()
      {
         b_foo = fTree->GetBranch( "foo" );
         return kTRUE;
      }

      virtual Bool_t ProcessCut( Int_t entry )
      {
         fTree->GetEntry( entry );
         return kTRUE;
      }

      virtual void ProcessFill( Int_t entry )
      {
         cerr << "entry " << entry << ", foo " << f_foo << endl;
      }
      

   private:

      TTree*   fTree;
      Int_t    f_foo;
      TBranch* b_foo;
};


// Local variables:
//  compile-command: "g++ -Wall `root-config --cflags` -c MySelector.cxx"
// End: