helib::Database< TXT > Class Template Reference

An object representing a database which is a HElib::Matrix<TXT>. More...

#include <partialMatch.h>

Public Member Functions
	Database (const Matrix< TXT > &M, std::shared_ptr< const Context > c)
	Constructor. More...
	Database (const Matrix< TXT > &M, const Context &c)
	Constructor. More...
template<typename TXT2 >
Matrix< TXT2 >	contains (const Query_t &lookup_query, const Matrix< TXT2 > &query_data) const
	Function for performing a database lookup given a query expression and query data. More...
template<typename TXT2 >
Matrix< TXT2 >	getScore (const Query_t &weighted_query, const Matrix< TXT2 > &query_data) const
	Function for performing a weighted partial match given a query expression and query data. More...
long	columns ()
	Returns number of columns in the database. More...

Detailed Description

template<typename TXT>
class helib::Database< TXT >

An object representing a database which is a HElib::Matrix<TXT>.

Template Parameters

TXT	The database is templated on TXT which can either be a Ctxt or a Ptxt<BGV>

Constructor & Destructor Documentation

Database() [1/2]

template<typename TXT >

helib::Database< TXT >::Database ( const Matrix< TXT > &  M, std::shared_ptr< const Context >  c  )

inline

Constructor.

Parameters

M	The Matrix<TXT> containing the data of the database.
c	A shared pointer to the context used to create the data.

Database() [2/2]

template<typename TXT >

helib::Database< TXT >::Database ( const Matrix< TXT > &  M, const Context &  c  )

inline

Constructor.

Parameters

M	The Matrix<TXT> containing the data of the database.
c	The context object used to create the data.

Note

This version accepts a Context that this object is not responsible for i.e. if it is on the stack. The programmer is responsible in this case for scope.

Member Function Documentation

columns()

template<typename TXT >

long helib::Database< TXT >::columns ( )

inline

Returns number of columns in the database.

Returns

The number of columns in the database.

contains()

template<typename TXT >

template<typename TXT2 >

Matrix< TXT2 > helib::Database< TXT >::contains ( const Query_t &  lookup_query, const Matrix< TXT2 > &  query_data  ) const

inline

Function for performing a database lookup given a query expression and query data.

Template Parameters

TXT2	The type of the query data, can be either a Ctxt or Ptxt<BGV>.

Parameters

lookup_query	The lookup query expression to perform.
query_data	The lookup query data to compare with the database.

Returns

A Matrix<TXT2> containing 1s and 0s in slots where there was a match or no match respectively.

getScore()

template<typename TXT >

template<typename TXT2 >

Matrix< TXT2 > helib::Database< TXT >::getScore ( const Query_t &  weighted_query, const Matrix< TXT2 > &  query_data  ) const

inline

Function for performing a weighted partial match given a query expression and query data.

Template Parameters

TXT2	The type of the query data, can be either a Ctxt or Ptxt<BGV>.

Parameters

weighted_query	The weighted lookup query expression to perform.
query_data	The query data to compare with the database.

Returns

A Matrix<TXT2> containing a score on weighted matches.