72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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*/
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#include "NestedList.h"
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#include "ListUtils.h"
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#include "AlgebraTypes.h"
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#include "Attribute.h"
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#include "StandardTypes.h"
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#include "counterPair.h"
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namespace eschbach {
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template<class T>
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class lossyCounter
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{
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public:
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lossyCounter(const float epsilon);
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~lossyCounter() {}
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//Getter und Setter
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void setDefined(bool value);
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bool getDefined();
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int getEleCounter();
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float getEpsilon();
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long getCurrentWindowIndex();
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int getWindowSize();
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T getElement(int index);
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std::unordered_map<T, counterPair<T>> getFrequencyList();
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//Auxiliary Functions
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void initialize(const float epsilon);
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void incrCount(T element);
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void addElement(T element);
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void insertElement(T element);
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bool elementPresent(T element);
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void reduce();
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void updateWindowIndex();
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std::vector<T> getFrequentElements(double minSupport);
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long estimateCount(T element);
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private:
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lossyCounter() {}
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bool defined;
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float epsilon;
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size_t eleCounter;
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int windowSize;
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long windowIndex;
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std::unordered_map<T, counterPair<T>> frequencyList;
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};
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} |