/* Copyright (C) 2012 J.F.Dockes
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _EXPANSIONDBS_H_INCLUDED_
#define _EXPANSIONDBS_H_INCLUDED_
#include <string>
#include <vector>
#include <xapian.h>
#include "unacpp.h"
/** Specialization and overall creation code for the term expansion mechanism
* defined in synfamily.h
*/
namespace Rcl {
/** A Capitals/Diacritics removal functor for using with
* XapComputableSynFamMember. The input term transformation always uses
* UNACFOLD. Post-expansion filtering uses either UNAC or FOLD
*/
class SynTermTransUnac : public SynTermTrans {
public:
/** Constructor
* @param op defines if we remove diacritics, case or both
*/
SynTermTransUnac(UnacOp op)
: m_op(op)
{
}
virtual std::string operator()(const std::string& in)
{
string out;
unacmaybefold(in, out, "UTF-8", m_op);
LOGDEB2(("SynTermTransUnac(%d): in [%s] out [%s]\n", int(m_op),
in.c_str(), out.c_str()));
return out;
}
UnacOp m_op;
};
/** Walk the Xapian term list and create all the expansion dbs in one go. */
extern bool createExpansionDbs(Xapian::WritableDatabase& wdb,
const std::vector<std::string>& langs);
}
#endif /* _EXPANSIONDBS_H_INCLUDED_ */