Event/GeneratorObject/include/DataModel/tools/PersistentState.h

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#ifndef DATAMODEL_TOOLS_PERSISTENTSTATE_H
#define DATAMODEL_TOOLS_PERSISTENTSTATE_H 1
 
#ifndef DATAMODEL_TOOLS_ISTORAGESTATE_H
#  include "DataModel/tools/IStorageState.h"
#endif
class IStoragePolicy;
 
// the storage is in the persistable state when p_data (the proxy) is defined
// we define the transition from persistable to identified
// and from persistable to accessible
 
class PersistentState : public IStorageState {
 
public:
  // create an instance: singleton
  static IStorageState* instance( void );
 
  // check whether this is a valid state
  static bool  valid( const IStoragePolicy* context );
  virtual bool isValid( const IStoragePolicy* context ) const;
 
  // everything is built in this state.  just return
 
  virtual void toAccessible( IStoragePolicy* );
  virtual void toIdentified( IStoragePolicy* );
  virtual void toPersistable( IStoragePolicy* );
 
protected:
  PersistentState( void ){};
 
private:
  static IStorageState* m_instance;
};
 
#endif