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Comparator.h
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Comparator.h
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/*
* Comparator.h
*
* Created on: Jun 13, 2013
* Author: wangli
*/
#ifndef COMPARATOR_H_
#define COMPARATOR_H_
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <map>
#include "data_type.h"
typedef bool (*comFun)(const void*,const void*);
class Comparator {
public:
enum comparison{L,LEQ,EQ,NEQ,G,GEQ};
struct Pair
{
column_type first;
column_type second;
public:
Pair(column_type first,column_type second):first(first),second(second){};
Pair(){};
bool operator==(const struct Comparator::Pair &p) const
{
return p.first==first&&p.second==second;
}
bool operator<(const struct Comparator::Pair &p) const
{
return this->first<p.first||this->second<p.second;
}
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned int version)
{
ar & first & second;
}
};
Comparator(column_type x, column_type b, Comparator::comparison c);
Comparator():compare(0){};
virtual ~Comparator();
bool (*compare)(const void*,const void*) ;
comparison getCompareType()const{
return compareType;
}
protected:
Pair pair;
comparison compareType;
private:
static std::map<Pair,comFun> funs_L;
static void initialize_L();
static std::map<Pair,comFun> funs_GEQ;
static void initialize_GEQ();
static std::map<Pair,comFun> funs_EQ;
static void initialize_EQ();
void iniatilize();
private:
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned int version)
{
ar & pair & compareType;
if(compare==0)
{
iniatilize();
}
}
};
#endif /* COMPARATOR_H_ */