#ifndef COMMAND_H
#define COMMAND_H
///////////////////////////////////////////////////////////////////
//  command.h   -  declare command and invoker classes           //
//  ver 1.1                                                      //
//                                                               //
//  Language:      Visual C++, ver 7.1                           //
//  Platform:      Dell Dimension 8300, Windows XP, Pro, sp2     //
//  Application:   CSE776 - Design Patterns, Summer 2005         //
//  Author:        Jim Fawcett, Instructor                       //
//                 CST 2-187, (315) 443-3948                     //
//                 jfawcett@twcny.rr.com                         //
///////////////////////////////////////////////////////////////////

#include <vector>

class command;

///////////////////////////////////////////////////////////////
//  invoker is usually some, perhaps large, library facility //
//  that generates events clients need to react to           //
///////////////////////////////////////////////////////////////

class invoker {

public:
  enum event { event1, event2, event3 };
  void Register(event,command*);
  void doCommands(event ev);
  void doEvents();

private:
  std::vector<command*> registrants[3];
};

///////////////////////////////////////////////////////////////
//  command defines some interface for executing client code //
//  when one of perhaps several special events occurs        //
///////////////////////////////////////////////////////////////

class command {

public:
  virtual void execute() = 0;
};

#endif