event.h

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#ifndef ANATOMIST_PROCESSOR_EVENT_H
#define ANATOMIST_PROCESSOR_EVENT_H

#include <cartobase/object/object.h>

namespace anatomist
{

  class OutputEvent
  {
  public:
    OutputEvent( const std::string & evname, carto::Object contents, 
                 bool allocIDs = true, 
                 const std::set<std::string> & discrimintantAttribs 
                 = std::set<std::string>() );
    virtual ~OutputEvent();
    virtual void send();
    std::string eventType() const { return _name; }
    carto::Object contents() const { return _contents; }

  protected:
    OutputEvent();

  private:
    std::string                 _name;
    bool                        _allocateIDs;
    carto::Object               _contents;
    std::set<std::string>       _discrim;
  };


  class OutputEventFilter
  {
  public:
    OutputEventFilter();
    ~OutputEventFilter();

    void filter( const std::string & evtype );
    void filter( const std::set<std::string> & evtype );
    void unfilter( const std::string & evtype );
    void unfilter( const std::set<std::string> & evtype );
    const std::set<std::string> & filters() const { return _filtered; }
    void setDefaultIsFiltering( bool );
    bool isDefaultFiltering() const { return _deffiltering; }
    void clear();

  private:
    bool                        _deffiltering;
    std::set<std::string>       _filtered;
  };


  class EventHandler
  {
  public:
    EventHandler();
    virtual ~EventHandler();
    virtual void doit( const OutputEvent & ) = 0;

    static void registerHandler( const std::string & evtype, 
                                 carto::rc_ptr<EventHandler> );
    static void unregisterHandler( const std::string & evtype, 
                                   carto::rc_ptr<EventHandler> );
    static const std::map<std::string, std::set<carto::rc_ptr<EventHandler> > >
    & handlers() { return _handlers(); }

  private:
    static std::map<std::string, std::set<carto::rc_ptr<EventHandler> > > 
    & _handlers();
  };

}


#endif