StRoot: StJetMaker/tree/StjTreeReader.cxx Source File

00001 // $Id: StjTreeReader.cxx,v 1.3 2009/12/03 09:57:36 pibero Exp $
00002 // Copyright (C) 2008 Tai Sakuma <sakuma@bnl.gov>
00003 #include "StjTreeReader.h"
00004 
00005 #include "StjTreeIndex.h"
00006 
00007 #include <TTree.h>
00008 
00009 ClassImp(StjTreeReader)
00010 
00011 void StjTreeReader::Init()
00012 {
00013   _tree->BuildIndex("runNumber", "eventId");
00014   SetBranchAddress(_tree);
00015 }
00016 
00017 Long64_t StjTreeReader::GetEntryWithIndex(const StjTreeIndex& idx)
00018 {
00019   return GetEntryWithIndex(idx.major(), idx.minor());
00020 }
00021 
00022 Long64_t StjTreeReader::GetEntryWithIndex(Int_t major, Int_t minor)
00023 {
00024   clearEntry();
00025 
00026   Long64_t ret = _tree->GetEntryWithIndex(major, minor);
00027 
00028   if(ret <= 0) return ret;
00029 
00030   readEntry();
00031 
00032   return ret;
00033 }