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/*
Copyright (c) 1998 - 2024
ILK - Tilburg University
CLST - Radboud University
CLiPS - University of Antwerp
This file is part of timbl
timbl is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
timbl is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
For questions and suggestions, see:
https://github.com/LanguageMachines/timbl/issues
or send mail to:
lamasoftware (at ) science.ru.nl
*/
#ifndef TIMBL_METRICS_H
#define TIMBL_METRICS_H
#include <exception>
#include <limits>
namespace Timbl{
class FeatureValue;
class metricClass {
public:
explicit metricClass( MetricType m ): _type(m){};
virtual ~metricClass() {};
MetricType type() const { return _type; };
virtual bool isSimilarityMetric() const = 0;
virtual bool isNumerical() const = 0;
virtual bool isStorable() const = 0;
virtual double distance( const FeatureValue *,
const FeatureValue *,
size_t=1, double = 1.0 ) const = 0;
virtual double get_max_similarity() const {
throw std::logic_error( "get_max_similarity not implemented for " +
TiCC::toString( _type ) );
}
private:
MetricType _type;
};
metricClass *getMetricClass( MetricType );
class distanceMetricClass: public metricClass {
public:
explicit distanceMetricClass( MetricType m ): metricClass(m){};
virtual ~distanceMetricClass() override {};
bool isSimilarityMetric() const override { return false; };
};
class OverlapMetric: public distanceMetricClass {
public:
OverlapMetric(): distanceMetricClass( Overlap ){};
bool isNumerical() const override { return false; };
bool isStorable() const override { return false; };
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class NumericMetricClass: public distanceMetricClass {
public:
explicit NumericMetricClass( MetricType m ): distanceMetricClass( m ){};
virtual ~NumericMetricClass() override {};
bool isNumerical() const override { return true; };
bool isStorable() const override { return false; };
};
class NumericMetric: public NumericMetricClass {
public:
NumericMetric(): NumericMetricClass( Numeric ){};
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class EuclideanMetric: public NumericMetricClass {
public:
EuclideanMetric(): NumericMetricClass( Euclidean ){};
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class ValueDiffMetric: public distanceMetricClass {
public:
ValueDiffMetric(): distanceMetricClass( ValueDiff ){};
bool isNumerical() const override { return false; };
bool isStorable() const override { return true; };
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class DiceMetric: public distanceMetricClass {
public:
DiceMetric(): distanceMetricClass( Dice ){};
bool isNumerical() const override { return false; };
bool isStorable() const override { return true; };
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class JeffreyMetric: public distanceMetricClass {
public:
JeffreyMetric(): distanceMetricClass( JeffreyDiv ){};
bool isNumerical() const override{ return false; };
bool isStorable() const override { return true; };
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class JSMetric: public distanceMetricClass {
public:
JSMetric(): distanceMetricClass( JSDiv ){};
bool isNumerical() const override { return false; };
bool isStorable() const override { return true; };
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class LevenshteinMetric: public distanceMetricClass {
public:
LevenshteinMetric(): distanceMetricClass( Levenshtein ){};
bool isNumerical() const override { return false; };
bool isStorable() const override { return true; };
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
};
class similarityMetricClass: public metricClass {
public:
explicit similarityMetricClass( MetricType m ): metricClass( m ){};
virtual ~similarityMetricClass() override {};
bool isSimilarityMetric() const override { return true; };
bool isNumerical() const override { return true; };
bool isStorable() const override { return false; };
};
class CosineMetric: public similarityMetricClass {
public:
CosineMetric(): similarityMetricClass( Cosine ){};
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
double get_max_similarity() const override { return 1.0; };
};
class DotProductMetric: public similarityMetricClass {
public:
DotProductMetric(): similarityMetricClass( DotProduct ){};
double distance( const FeatureValue *,
const FeatureValue *,
size_t,
double ) const override;
double get_max_similarity() const override {
return std::numeric_limits<int>::max();
};
};
}
#endif // TIMBL_METRICS_H
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