EVE/Reve/TTreeTools.cxx

   1 // $Header$
   2
   3 //__________________________________________________________________________
   4 // TTreeTools
   5 //
   6 // Collection of classes for TTree interaction.
   7
   8 #include "TTreeTools.h"
   9 #include <TTree.h>
  10 #include <TTreeFormula.h>
  11
  12 /**************************************************************************/
  13 /**************************************************************************/
  14
  15 ClassImp(TSelectorToEventList)
  16
  17 TSelectorToEventList::TSelectorToEventList(TEventList* evl, const Text_t* sel) :
  18   TSelectorDraw(), fEvList(evl)
  19 {
  20   fInput.Add(new TNamed("varexp", ""));
  21   fInput.Add(new TNamed("selection", sel));
  22   SetInputList(&fInput);
  23 }
  24
  25 Bool_t TSelectorToEventList::Process(Long64_t entry)
  26 {
  27   if(ProcessCut(entry)) { ProcessFill(entry); return true; }
  28   return false;
  29 }
  30
  31 Bool_t TSelectorToEventList::ProcessCut(Long64_t )
  32 {
  33   return GetSelect()->EvalInstance(0) != 0;
  34 }
  35
  36 /**************************************************************************/
  37 /**************************************************************************/
  38
  39 ClassImp(TTreeQuery)
  40
  41 Int_t TTreeQuery::Select(TTree* t, const Text_t* selection)
  42 {
  43   TSelectorToEventList sel(this, selection);
  44   t->Process(&sel, "goff");
  45   return GetN();
  46 }