From a815f9dd810aff16dd3f8e9cf06cd67adff5fd66 Mon Sep 17 00:00:00 2001
From: vestbo <vestbo@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Tue, 28 May 2002 14:53:36 +0000
Subject: [PATCH] Bugfix in AliL3FileHandler::GetDigitsTree. Added a new
 function AliL3FileHandler::FreeDigitsTree(), in order to be able to clear the
 digits tree from memory, without deleting the object. Useful feature if you
 want to loop over several events in a single rootfile.

---
 HLT/src/AliL3FileHandler.cxx | 23 +++++++++++++++++++----
 HLT/src/AliL3FileHandler.h   |  4 +++-
 HLT/src/AliL3MemHandler.h    |  1 +
 3 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/HLT/src/AliL3FileHandler.cxx b/HLT/src/AliL3FileHandler.cxx
index b26415c67eb..397ba2089ed 100644
--- a/HLT/src/AliL3FileHandler.cxx
+++ b/HLT/src/AliL3FileHandler.cxx
@@ -70,11 +70,25 @@ AliL3FileHandler::~AliL3FileHandler()
 {
   //Destructor
   if(fMC) CloseMCOutput();
-  if(fDigitsTree) delete fDigitsTree;
+  FreeDigitsTree();
   if(fInAli) CloseAliInput();
   
 }
 
+void AliL3FileHandler::FreeDigitsTree()
+{
+  if(!fDigitsTree)
+    {
+      LOG(AliL3Log::kWarning,"AliL3FileHandler::FreeDigitsTree()","Pointer")
+	<<"Cannot free digitstree, it is not present"<<ENDLOG;
+      return;
+    }
+  fDigits=0;
+  fDigitsTree->Delete();
+  fDigitsTree=0;
+}
+
+
 Bool_t AliL3FileHandler::SetMCOutput(char *name)
 {
   fMC = fopen(name,"w");
@@ -233,7 +247,7 @@ AliL3DigitRowData * AliL3FileHandler::AliDigits2Memory(UInt_t & nrow,Int_t event
   
   if(!fDigitsTree)
     GetDigitsTree(event);
-    
+  
   UShort_t dig;
   Int_t time,pad,sector,row;
   Int_t nrows=0;
@@ -252,7 +266,7 @@ AliL3DigitRowData * AliL3FileHandler::AliDigits2Memory(UInt_t & nrow,Int_t event
       if(lslice != fSlice) break;
       if(lrow < fRowMin) continue;
       if(lrow > fRowMax) break;
-
+      
       Float_t xyz[3];
       ndigits[lrow] = 0;
       fDigits->First();
@@ -352,6 +366,7 @@ AliL3DigitRowData * AliL3FileHandler::AliDigits2Memory(UInt_t & nrow,Int_t event
   return data;
 }
 
+
 Bool_t AliL3FileHandler::GetDigitsTree(Int_t event)
 {
   //Connects to the TPC digit tree in the AliROOT file.
@@ -359,7 +374,7 @@ Bool_t AliL3FileHandler::GetDigitsTree(Int_t event)
   fInAli->cd();
   Char_t dname[100];
   sprintf(dname,"TreeD_75x40_100x60_%d",event);
-  fDigitsTree = (TTree*)fInAli->Get("TreeD_75x40_100x60_0");
+  fDigitsTree = (TTree*)fInAli->Get(dname);
   if(!fDigitsTree) 
     {
       LOG(AliL3Log::kError,"AliL3FileHandler::GetDigitsTree","Digits Tree")
diff --git a/HLT/src/AliL3FileHandler.h b/HLT/src/AliL3FileHandler.h
index 31e0d6f71a2..08b8b4fdaa1 100644
--- a/HLT/src/AliL3FileHandler.h
+++ b/HLT/src/AliL3FileHandler.h
@@ -30,11 +30,13 @@ class AliL3FileHandler:public AliL3MemHandler{
   AliL3FileHandler();
   virtual ~AliL3FileHandler();
 
+  void FreeDigitsTree();
   Bool_t SetAliInput(char *name);
   Bool_t SetAliInput(TFile *file);
   void CloseAliInput(); 
   Bool_t IsDigit();
- 
+  
+
   Bool_t SetMCOutput(char *name);
   Bool_t SetMCOutput(FILE *file);
   void CloseMCOutput();
diff --git a/HLT/src/AliL3MemHandler.h b/HLT/src/AliL3MemHandler.h
index 120f90f7bde..0e7c0295ef3 100644
--- a/HLT/src/AliL3MemHandler.h
+++ b/HLT/src/AliL3MemHandler.h
@@ -136,6 +136,7 @@ class AliL3MemHandler{
   Int_t GetPatch(){return fPatch;}
   
   //virtual functions:
+  virtual void FreeDigitsTree() {return;}
   virtual Bool_t SetAliInput(char *name){return 0;}
   virtual void CloseAliInput(){return;} 
   virtual Bool_t IsDigit(){return 0;}
-- 
2.31.1