INavigationToken.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef INAVIGATIONTOKEN_H
#define INAVIGATIONTOKEN_H
 
//
//  Navigation Abstract Base Class
//
//  Author:   H. Ma, S. Rajagopalan, P. Loch
//
//  This class is the base class for the templated NavigationToken class. A
//  method pushQuery(INavigable&) allows to terminate navigation.
//
 
class INavigable;
 
#include <any>
 
class INavigationToken
{
 public:
 
  virtual ~INavigationToken();
 
  // check if query must be forwarded
  virtual bool pushQuery( const INavigable& parent,
              const INavigable& child ) = 0;
 
  // 
  virtual bool trySetObject(const INavigable* child) = 0;
  virtual bool trySetObject(const INavigable* child,
                const std::any& relPar) = 0; 
 
};
#endif