85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
//
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// MODULE: APGTSCAC.H
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//
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// PURPOSE: Cache (maps from a set of NID/IST pairs to a set of recommended NIDs)
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//
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// PROJECT: Generic Troubleshooter DLL for Microsoft AnswerPoint
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//
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// COMPANY: Saltmine Creative, Inc. (206)-284-7511 support@saltmine.com
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//
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// AUTHOR: Roman Mach, Joe Mabel
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//
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// ORIGINAL DATE: 8-2-96
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//
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// NOTES:
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// 1. Based on Print Troubleshooter DLL
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//
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// Version Date By Comments
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//--------------------------------------------------------------------
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// V3.0 7-24-98 JM pulled out of apgts.h
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//
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#ifndef _APGTSCAC_H_DEFINED
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#define _APGTSCAC_H_DEFINED
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#if _MSC_VER >= 1000
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#pragma once
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#endif // _MSC_VER >= 1000
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#include <list>
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#include "nodestate.h"
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// maximum cache for belief networks
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#define MAXCACHESIZE 200
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// Maps from a set of node/state pairs to an ordered list of recommended nodes
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// This is all within the context of a particular belief network.
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class CCacheItem
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{
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private:
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CBasisForInference BasisForInference; // Cache key. Set of node/state pairs, not all
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// the nodes in the belief network, just the ones on which we
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// have state data from the user. State is never ST_UNKNOWN.
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// No "special" nodes like nidFailNode; these are all valid nodes
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// on which to base an inference.
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CRecommendations Recommendations; // Cache value. Unless nodes have been skipped, only the
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// first element of the vector really matters because we will
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// only give one recommendation at a time.
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public:
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CCacheItem() {};
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CCacheItem(const CBasisForInference & Basis, const CRecommendations &Rec) :
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BasisForInference(Basis), Recommendations(Rec)
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{};
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// note that the following makes a copy; it does not return a reference.
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CRecommendations GetRecommendations() const {return Recommendations;}
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// The following comparison operators depend on the assumption that if the cache key
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// is identical, the cache value will be, too.
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// Note that this we do not use lexicographical order. We're saying any shorter
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// cache key compares as less than any longer.
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bool operator== (const CCacheItem &item) const;
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bool operator!= (const CCacheItem &item) const;
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bool operator< (const CCacheItem &item) const;
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bool operator> (const CCacheItem &item) const;
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};
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class CCache
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{
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private:
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list<CCacheItem> listItems;
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enum {k_CacheSizeMax = 200};
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public:
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CCache() {};
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~CCache() {};
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void Clear() {listItems.clear();};
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bool AddCacheItem(const CBasisForInference &BasisForInference, const CRecommendations &Recommendations);
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bool FindCacheItem(const CBasisForInference &BasisForInference, CRecommendations &Recommendations) const;
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UINT GetCount() const;
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};
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#endif //_APGTSCAC_H_DEFINED
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