rsesreductshortener.cpp

粗慥集成算法集合 ,并有详细的文档资料和测试数据处

//-------------------------------------------------------------------
// Author........: Aleksander 豩rn
// Date..........:
// Description...:
// Revisions.....:
//===================================================================

#include <stdafx.h> // Precompiled headers.
#include <copyright.h>

#include <kernel/rses/algorithms/rsesreductshortener.h>

#include <kernel/algorithms/keyword.h>

#include <kernel/rses/structures/rsesreducts.h>
#include <kernel/rses/structures/rsesdecisiontable.h>

#include <kernel/rses/library/trr_mem.h>
#include <kernel/rses/library/trr_calc.h>
#include <kernel/rses/library/err.h>

#include <kernel/basic/message.h>

//-------------------------------------------------------------------
// Methods for class RSESReductShortener.
//===================================================================

//-------------------------------------------------------------------
// Constructors/destructor.
//===================================================================

//-------------------------------------------------------------------
// Method........: Constructor
// Author........:
// Date..........:
// Description...:
// Comments......:
// Revisions.....:
//===================================================================

RSESReductShortener::RSESReductShortener() {
	SetDiscernibilityRatio(0.75);
}

//-------------------------------------------------------------------
// Method........: Destructor
// Author........:
// Date..........:
// Description...:
// Comments......:
// Revisions.....:
//===================================================================

RSESReductShortener::~RSESReductShortener() {
}

//-------------------------------------------------------------------
// Methods inherited from Identifier.
//===================================================================

IMPLEMENTIDMETHODS(RSESReductShortener, RSESREDUCTSHORTENER, ReductShortener)

//-------------------------------------------------------------------
// Methods inherited from Algorithm.
//===================================================================

//-------------------------------------------------------------------
// Method........: GetParameters
// Author........: Aleksander 豩rn
// Date..........:
// Description...:
// Comments......:
// Revisions.....:
//===================================================================

String
RSESReductShortener::GetParameters() const {

	String parameters;

	parameters += Keyword::Ratio();
	parameters += Keyword::Assignment();
	parameters += String::Format(GetDiscernibilityRatio());

	return parameters;

}

//-------------------------------------------------------------------
// Method........: SetParameter
// Author........: Aleksander 豩rn
// Date..........:
// Description...:
// Comments......:
// Revisions.....:
//===================================================================

bool
RSESReductShortener::SetParameter(const String &keyword, const String &value) {

	if (keyword == Keyword::Ratio() && value.IsFloat())
		return SetDiscernibilityRatio(value.GetFloat());

	return false;

}

//-------------------------------------------------------------------
// Method........: IsApplicable
// Author........: Aleksander 豩rn
// Date..........:
// Description...:
// Comments......:
// Revisions.....:
//===================================================================

bool
RSESReductShortener::IsApplicable(const Structure &structure, bool /*warn*/) const {
	return structure.IsA(RSESREDUCTS);
}

//-------------------------------------------------------------------
// Method........: Apply
// Author........: Aleksander 豩rn
// Date..........:
// Description...:
// Comments......: Assumes that library clients use handles.
// Revisions.....:
//===================================================================

Structure *
RSESReductShortener::Apply(Structure &structure) const {

	// Verify input.
	if (!IsApplicable(structure))
		return NULL;

	// Cast to verified type.
	Handle<RSESReducts> reducts = dynamic_cast(RSESReducts *, &structure);

	// Get originating RSES decision table.
	Handle<RSESDecisionTable> table = dynamic_cast(RSESDecisionTable *, reducts->FindParent(RSESDECISIONTABLE));

	if (table.IsNULL()) {
		Message::Error("Could not find originating RSES decision table.");
		return NULL;
	}

	// Is the embedded RSES object instantiated?
	if (reducts->reducts_ == NULL) {
		Message::Error("No reducts to shorten.");
		return NULL;
	}

	// Does the embedded reduct and rule memory have any rules attached?
	try {
		if (reducts->reducts_->NoRules() > 0) {
			Message::Error("Cannot shorten reducts with derived rules.");
			return NULL;
		}
	}
	catch (Error &error) {
		Message::RSESError("Error accessing embedded RSES reduct and rule memory.", error.GetMessage());
		return NULL;
	}

	// Do the shortening.
	/*
	try {
		TRedRulCalc algorithm;
		algorithm.ShortenReducts(table->decisiontable_, reducts->reducts_, GetDiscernibilityRatio());
	}
	catch (Error &error) {
		Message::RSESError("Error shortening reducts with reduct shortener from RSES library.", error.GetMessage());
		return NULL;
	}

	return reducts.Release();
	*/

	Message::Error("Not yet implemented in the RSES library.");

	return NULL;

}