IConditionsChangeListener.hh

#ifndef IConditionsChangeListener_h
#define IConditionsChangeListener_h

#include "lcio.h"
#include "EVENT/LCCollection.h"

namespace lccd {
  
  class ConditionsHandlerBase;
  class IConditionsHandler;

class IConditionsChangeListener {
  
public:

  virtual ~IConditionsChangeListener() {} 

  friend class ConditionsHandlerBase;

protected:

  virtual void conditionsChanged( lcio::LCCollection* col ) = 0 ;


  virtual void registeredWithHandler( IConditionsHandler* ch )  { _handlerList.push_back( ch );  } ;


  virtual void deRegisteredWithHandler( IConditionsHandler* ch ) { _handlerList.remove( ch ); } ;

  const std::list<IConditionsHandler*>& handlerList() { return _handlerList ; } ;

private:  
  std::list<IConditionsHandler*> _handlerList{};
  
};

}  //end namespace

#endif // IConditionsChangeListener_h