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/*
* DNN - Data News Network
*
* by Stephane Chatty
*
* Copyright 1993-1996
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* Event sources.
*
* $Id$
* $CurLog$
*/
#ifndef DnnSource_H_
#define DnnSource_H_
#include "cplus_bugs.h"
template <class ITEM> class CcuArrayOf;
template <class ITEM> class CcuHashTableOf;
class DnnTrigger;
class DnnEvent;
class DnnBaseReaction;
class DnnEventSource {
protected:
DnnEventSource ();
virtual ~DnnEventSource ();
void Emit (DnnEvent*);
virtual void DispatchEvent (DnnEvent*) = 0;
};
class DnnEventSelector {
public:
DnnEventSelector ();
virtual ~DnnEventSelector ();
virtual DnnTrigger* FindTrigger (DnnEvent*) = 0;
};
typedef int (*DnnIntExtractor) (DnnEvent*);
class DnnEventIntSelector : public DnnEventSelector {
protected:
DnnIntExtractor IdExtractor;
int MaxSize;
CcuArrayOf<DnnTrigger> *Triggers;
public:
DnnEventIntSelector (DnnIntExtractor, int);
~DnnEventIntSelector ();
DnnTrigger* UseTrigger (int);
void UnuseTrigger (int, DnnBaseReaction*);
DnnTrigger* FindTrigger (DnnEvent*);
};
typedef void* (*DnnPtrExtractor) (DnnEvent*);
class DnnEventPtrSelector : public DnnEventSelector {
protected:
DnnPtrExtractor PtrExtractor;
int TblSize;
CcuHashTableOf<DnnTrigger> *Triggers;
public:
DnnEventPtrSelector (DnnPtrExtractor, int);
~DnnEventPtrSelector ();
DnnTrigger* UseTrigger (void*);
void UnuseTrigger (void*, DnnBaseReaction*);
DnnTrigger* FindTrigger (DnnEvent*);
};
#endif /* DnnSource_H_ */
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