StringDistance.h

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00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 3 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * Written (W) 2006-2009 Christian Gehl
00008  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _STRINGDISTANCE_H___
00012 #define _STRINGDISTANCE_H___
00013 
00014 #include <shogun/distance/Distance.h>
00015 #include <shogun/features/StringFeatures.h>
00016 
00017 namespace shogun
00018 {
00020 template <class ST> class CStringDistance : public CDistance
00021 {
00022     public:
00024         CStringDistance() : CDistance() {}
00025 
00032         /* when training data is supplied as both l and r do_init
00033          * should be true
00034         */
00035         virtual bool init(CFeatures* l, CFeatures* r)
00036         {
00037             CDistance::init(l,r);
00038 
00039             ASSERT(l->get_feature_class()==C_STRING);
00040             ASSERT(r->get_feature_class()==C_STRING);
00041             ASSERT(l->get_feature_type()==this->get_feature_type());
00042             ASSERT(r->get_feature_type()==this->get_feature_type());
00043             return true;
00044         }
00045 
00050         virtual EFeatureClass get_feature_class() { return C_STRING; }
00051 
00056         virtual EFeatureType get_feature_type();
00057 
00063         virtual const char* get_name() const {
00064             return "StringDistance"; }
00065 
00070         virtual void cleanup()=0;
00071 
00078         virtual EDistanceType get_distance_type()=0;
00079 };
00080 
00085 template<> inline EFeatureType CStringDistance<float64_t>::get_feature_type() { return F_DREAL; }
00086 
00091 template<> inline EFeatureType CStringDistance<uint64_t>::get_feature_type() { return F_ULONG; }
00092 
00097 template<> inline EFeatureType CStringDistance<int32_t>::get_feature_type() { return F_INT; }
00098 
00103 template<> inline EFeatureType CStringDistance<uint16_t>::get_feature_type() { return F_WORD; }
00104 
00109 template<> inline EFeatureType CStringDistance<int16_t>::get_feature_type() { return F_SHORT; }
00110 
00115 template<> inline EFeatureType CStringDistance<uint8_t>::get_feature_type() { return F_BYTE; }
00116 
00121 template<> inline EFeatureType CStringDistance<char>::get_feature_type() { return F_CHAR; }
00122 
00123 } // namespace shogun
00124 #endif
00125 
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