added debug mode for GetVertex

diff --git a/PWG0/AliPWG0Helper.cxx b/PWG0/AliPWG0Helper.cxx
index 0b06b09175b01a8191e0b22a256324e273ae2452..e4edd80ea914363d8ca3c1988e8b5f73a1dddc4b 100644 (file)
--- a/PWG0/AliPWG0Helper.cxx
+++ b/PWG0/AliPWG0Helper.cxx
@@ -108,7 +108,7 @@ Bool_t AliPWG0Helper::IsVertexReconstructed(const AliESDVertex* vtxESD)
 }
 
 //____________________________________________________________________
-const AliESDVertex* AliPWG0Helper::GetVertex(const AliESDEvent* aEsd, AnalysisMode analysisMode)
+const AliESDVertex* AliPWG0Helper::GetVertex(const AliESDEvent* aEsd, AnalysisMode analysisMode, Bool_t debug)
 {
   // Get the vertex from the ESD and returns it if the vertex is valid
   //
@@ -121,27 +121,43 @@ const AliESDVertex* AliPWG0Helper::GetVertex(const AliESDEvent* aEsd, AnalysisMo
   {
     vertex = aEsd->GetVertex();
     requiredZResolution = 0.1;
+    if (debug)
+      Printf("AliPWG0Helper::GetVertex: Returning SPD vertex");
   }
   else if (analysisMode == kTPC) 
   {
     vertex = aEsd->GetPrimaryVertex();
     requiredZResolution = 0.6;
+    if (debug)
+      Printf("AliPWG0Helper::GetVertex: Returning vertex from tracks");
   }
   else
     Printf("AliPWG0Helper::GetVertex: ERROR: Invalid second argument %d", analysisMode);
 
-  if (!vertex)
+  if (!vertex) {
+    if (debug)
+      Printf("AliPWG0Helper::GetVertex: No vertex found in ESD");
     return 0;
+  }
 
   // check Ncontributors
-  if (vertex->GetNContributors() <= 0)
+  if (vertex->GetNContributors() <= 0) {
+    if (debug)
+      Printf("AliPWG0Helper::GetVertex: NContributors() <= 0");
     return 0;
+  }
 
   // check resolution
   Double_t zRes = vertex->GetZRes();
 
-  if (zRes == 0 || zRes > requiredZResolution)
+  if (zRes == 0 || zRes > requiredZResolution) {
+    if (debug)
+      Printf("AliPWG0Helper::GetVertex: Resolution too poor %f (required: %f", zRes, requiredZResolution);
     return 0;
+  }
+
+  if (debug)
+    Printf("AliPWG0Helper::GetVertex: Returning valid vertex");
 
   return vertex;
 }

diff --git a/PWG0/AliPWG0Helper.h b/PWG0/AliPWG0Helper.h
index f14cb28c45d9bdc37af7e1fe3c9b3a55f4e92d8b..548514a97d5933a63c344039f091f0e75aa4c971 100644 (file)
--- a/PWG0/AliPWG0Helper.h
+++ b/PWG0/AliPWG0Helper.h
@@ -28,7 +28,7 @@ class AliPWG0Helper : public TObject
     static Bool_t IsEventTriggered(ULong64_t triggerMask, Trigger trigger = kMB2);
     static Bool_t IsVertexReconstructed(const AliESD* aEsd);
     static Bool_t IsVertexReconstructed(const AliESDVertex* vtxESD);
-    static const AliESDVertex* GetVertex(const AliESDEvent* aEsd, AnalysisMode analysisMethod);
+    static const AliESDVertex* GetVertex(const AliESDEvent* aEsd, AnalysisMode analysisMethod, Bool_t debug = kFALSE);
 
     static Bool_t IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug = kFALSE);