//
// *** Class AliRsnTarget ***
//
// Base class used wherever it is needed to check the class type of
// an object (daughter, mother, event) which could be used for
// cut checking or value computing.
// Since most of these operation are implemented into classes that
// operate on any of such objects, then this class helps in making sure
// that the object being processed corresponds to what is expected.
//

#include "AliLog.h"

#include "AliRsnDaughter.h"
#include "AliRsnMother.h"

#include "AliRsnTarget.h"

ClassImp(AliRsnTarget)

AliRsnEvent* AliRsnTarget::fgCurrentEvent = 0x0;

const Double_t AliRsnTarget::fgkVeryBig   = 1E+10;
const Double_t AliRsnTarget::fgkVerySmall = 1E-10;

//_____________________________________________________________________________
Bool_t AliRsnTarget::TargetOK(TObject *object)
{
//
// This method compares the target type stored as data member
// with the type of the object passed as argument, and returns
// kTRUE or kFALSE depending if they match or not.
//

   // fails by default if a NULL pointer is passed
   if (!object) {
      AliError("Object is NULL");
      return kFALSE;
   }

   // checks if the object is correct by dynamic casting
   switch (fTargetType) {
      case kDaughter:
         fDaughter = dynamic_cast<AliRsnDaughter*>(object);
         fMother   = 0x0;
         fEvent    = 0x0;
         if (fDaughter)
            return kTRUE;
         else {
            AliError(Form("[%s] Target mismatch: expected 'AliRsnDaughter', passed '%s'", GetName(), object->ClassName()));
            Print();
            return kFALSE;
         }
      case kMother:
         fDaughter = 0x0;
         fMother   = dynamic_cast<AliRsnMother*>(object);
         fEvent    = 0x0;
         if (fMother)
            return kTRUE;
         else {
            AliError(Form("[%s] Target mismatch: expected 'AliRsnMother', passed '%s'", GetName(), object->ClassName()));
            Print();
            return kFALSE;
         }
      case kEvent:
         fDaughter = 0x0;
         fMother   = 0x0;
         fEvent    = dynamic_cast<AliRsnEvent*>(object);
         if (fEvent)
            return kTRUE;
         else {
            AliError(Form("[%s] Target mismatch: expected 'AliRsnEvent', passed '%s'", GetName(), object->ClassName()));
            Print();
            return kFALSE;
         }
      default:
         fDaughter = 0x0;
         fMother   = 0x0;
         fEvent    = 0x0;
         return kFALSE;
   }
}

//______________________________________________________________________________
Char_t AliRsnTarget::GetTargetTypeChar() const
{
//
// Returns a single character identifying the cut target type.
//

   switch (fTargetType) {
      case kDaughter: return 'D';
      case kMother: return 'M';
      case kEvent: return 'E';
      default: return 'X';
   }
}

//______________________________________________________________________________
const char* AliRsnTarget::GetTargetTypeName() const
{
//
// Returns a string with the name of the cut target type-
//

   switch (fTargetType) {
      case kDaughter: return "Daughter";
      case kMother: return "Mother";
      case kEvent: return "Event";
      default: return "Undefined";
   }
}