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// $Id: G4HadronicInteractionRegistry.cc,v 1.9 2009/12/02 15:57:57 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// 23-Jan-2009 V.Ivanchenko make the class to be a singleton

#include "G4HadronicInteractionRegistry.hh"
#include "G4HadronicInteraction.hh"

G4HadronicInteractionRegistry* G4HadronicInteractionRegistry::theInstance = 0;

G4HadronicInteractionRegistry* G4HadronicInteractionRegistry::Instance()
{
  if(0 == theInstance) {
    static G4HadronicInteractionRegistry manager;
    theInstance = &manager;
  }
  return theInstance;
}

G4HadronicInteractionRegistry::G4HadronicInteractionRegistry()
{}

G4HadronicInteractionRegistry::~G4HadronicInteractionRegistry()
{
  Clean();
}

void G4HadronicInteractionRegistry::Clean()
{
  size_t nModels = allModels.size();
  //G4cout << "G4HadronicInteractionRegistry::Clean() start " << nModels << G4endl;
  if(0 < nModels) {
    for (size_t i=0; i<nModels; ++i) {
      if( allModels[i] ) {
	//G4cout << "delete " << i << G4endl;
        //G4cout << allModels[i]->GetModelName() << G4endl;
	G4HadronicInteraction * model = allModels[i];
	allModels[i] = 0;
	delete model;
      }
    }
    allModels.clear();
  }
  //G4cout << "G4HadronicInteractionRegistry::Clean() is done " << G4endl; 
}

void G4HadronicInteractionRegistry::
RegisterMe(G4HadronicInteraction * aModel)
{
  if(!aModel) { return; }
  size_t nModels = allModels.size();
  if(nModels > 0) {
    for (size_t i=0; i<nModels; ++i) {
      if( aModel == allModels[i] ) { return; }
    }
  }
  //G4cout << "Register model <" << aModel->GetModelName() 
  //<< ">  " << nModels+1 << G4endl;
  allModels.push_back(aModel);
}

void G4HadronicInteractionRegistry::
RemoveMe(G4HadronicInteraction * aModel)
{
  if(!aModel) { return; }
  size_t nModels = allModels.size();
  if(0 == nModels) { return; }
  for (size_t i=0; i<nModels; ++i) {
    if( aModel == allModels[i] ) {
      //G4cout << "DeRegister model <" << aModel->GetModelName() 
      //<< ">  " << i << G4endl;
      allModels[i] = 0;
      if(i == nModels-1) allModels.pop_back();
      return;
    }
  }
}
