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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 IvlSource_H_
#define IvlSource_H_
#include "cplus_bugs.h"
template <class ITEM> class IvlArrayOf;
template <class ITEM> class IvlHashTableOf;
class IvlTrigger;
class IvlEvent;
class IvlBaseReaction;
class IvlEventSource {
protected:
IvlEventSource ();
virtual ~IvlEventSource ();
void Emit (IvlEvent*);
virtual void DispatchEvent (IvlEvent*) = 0;
};
class IvlEventSelector {
public:
IvlEventSelector ();
virtual ~IvlEventSelector ();
virtual IvlTrigger* FindTrigger (IvlEvent*) = 0;
};
typedef int (*IvlIntExtractor) (IvlEvent*);
class IvlEventIntSelector : public IvlEventSelector {
protected:
IvlIntExtractor IdExtractor;
int MaxSize;
IvlArrayOf<IvlTrigger> *Triggers;
public:
IvlEventIntSelector (IvlIntExtractor, int);
~IvlEventIntSelector ();
IvlTrigger* UseTrigger (int);
void UnuseTrigger (int, IvlBaseReaction*);
IvlTrigger* FindTrigger (IvlEvent*);
};
typedef void* (*IvlPtrExtractor) (IvlEvent*);
class IvlEventPtrSelector : public IvlEventSelector {
protected:
IvlPtrExtractor PtrExtractor;
int TblSize;
IvlHashTableOf<IvlTrigger> *Triggers;
public:
IvlEventPtrSelector (IvlPtrExtractor, int);
~IvlEventPtrSelector ();
IvlTrigger* UseTrigger (void*);
void UnuseTrigger (void*, IvlBaseReaction*);
IvlTrigger* FindTrigger (IvlEvent*);
};
#endif /* IvlSource_H_ */
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