PolyMatchStringKernel.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) 1999-2008 Soeren Sonnenburg
00008  * Copyright (C) 1999-2008 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _POLYMATCHSTRINGKERNEL_H___
00012 #define _POLYMATCHSTRINGKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/StringKernel.h"
00016 
00018 class CPolyMatchStringKernel: public CStringKernel<CHAR>
00019 {
00020     public:
00028         CPolyMatchStringKernel(INT size, INT degree, bool inhomogene,
00029             bool use_normalization=true);
00030 
00039         CPolyMatchStringKernel(
00040             CStringFeatures<CHAR>* l, CStringFeatures<CHAR>* r,
00041             INT degree, bool inhomogene, bool use_normalization=true);
00042 
00043         virtual ~CPolyMatchStringKernel();
00044 
00051         virtual bool init(CFeatures* l, CFeatures* r);
00052 
00054         virtual void cleanup();
00055 
00061         virtual bool load_init(FILE* src);
00062 
00068         virtual bool save_init(FILE* dest);
00069 
00074         virtual EKernelType get_kernel_type()
00075         {
00076             return K_POLYMATCH;
00077         }
00078 
00083         virtual const CHAR* get_name()
00084         {
00085             return "PolyMatchString";
00086         }
00087 
00088     protected:
00097         virtual DREAL compute(INT idx_a, INT idx_b);
00098 
00099     protected:
00101         INT degree;
00103         bool inhomogene;
00105         bool use_normalization;
00106 
00108         DREAL *sqrtdiag_lhs;
00110         DREAL *sqrtdiag_rhs;
00112         bool initialized;
00113 };
00114 
00115 #endif /* _POLYMATCHSTRINGKERNEL_H___ */

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