#ifndef lint
static char rcsid[] = "@(#$Id: wasatorcl.cpp,v 1.8 2007-02-13 10:58:31 dockes Exp $ (C) 2006 J.F.Dockes";
#endif
/*
* 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.
*/
#include "wasastringtoquery.h"
#include "rcldb.h"
#include "searchdata.h"
#include "wasatorcl.h"
#include "debuglog.h"
Rcl::SearchData *wasaStringToRcl(const string &qs, string &reason)
{
StringToWasaQuery parser;
WasaQuery *wq = parser.stringToQuery(qs, reason);
if (wq == 0)
return 0;
Rcl::SearchData *rq = wasaQueryToRcl(wq);
if (rq == 0) {
reason = "Failed translating wasa query structure to recoll";
return 0;
}
return rq;
}
Rcl::SearchData *wasaQueryToRcl(WasaQuery *wasa)
{
if (wasa == 0)
return 0;
Rcl::SearchData *sdata = new Rcl::SearchData(Rcl::SCLT_AND);
WasaQuery::subqlist_t::iterator it;
Rcl::SearchDataClause *nclause;
for (it = wasa->m_subs.begin(); it != wasa->m_subs.end(); it++) {
switch ((*it)->m_op) {
case WasaQuery::OP_NULL:
case WasaQuery::OP_AND:
default:
// ??
continue;
case WasaQuery::OP_LEAF:
if ((*it)->m_value.find_first_of(" \t\n\r") != string::npos) {
nclause = new Rcl::SearchDataClauseDist(Rcl::SCLT_PHRASE,
(*it)->m_value, 0,
(*it)->m_fieldspec);
} else {
nclause = new Rcl::SearchDataClauseSimple(Rcl::SCLT_AND,
(*it)->m_value,
(*it)->m_fieldspec);
}
if (nclause == 0) {
LOGERR(("wasaQueryToRcl: out of memory\n"));
return 0;
}
if ((*it)->m_modifiers & WasaQuery::WQM_NOSTEM) {
fprintf(stderr, "Setting NOSTEM\n");
nclause->setModifiers(Rcl::SearchDataClause::SDCM_NOSTEMMING);
}
sdata->addClause(nclause);
break;
case WasaQuery::OP_EXCL:
// Note: have to add dquotes which will be translated to
// phrase if there are several words in there. Not pretty
// but should work. If there is actually a single
// word, it will not be taken as a phrase, and
// stem-expansion will work normally
nclause = new Rcl::SearchDataClauseSimple(Rcl::SCLT_EXCL,
string("\"") +
(*it)->m_value + "\"",
(*it)->m_fieldspec);
if (nclause == 0) {
LOGERR(("wasaQueryToRcl: out of memory\n"));
return 0;
}
if ((*it)->m_modifiers & WasaQuery::WQM_NOSTEM)
nclause->setModifiers(Rcl::SearchDataClause::SDCM_NOSTEMMING);
sdata->addClause(nclause);
break;
case WasaQuery::OP_OR:
// Concatenate all OR values as phrases. Hope there are no
// stray dquotes in there. Note that single terms won't be
// handled as real phrases inside searchdata.cpp (so the
// added dquotes won't interfer with stemming)
{
string orvalue;
WasaQuery::subqlist_t::iterator orit;
for (orit = (*it)->m_subs.begin();
orit != (*it)->m_subs.end(); orit++) {
orvalue += string("\"") + (*orit)->m_value + "\" ";
}
nclause = new Rcl::SearchDataClauseSimple(Rcl::SCLT_OR,
orvalue,
(*it)->m_fieldspec);
if (nclause == 0) {
LOGERR(("wasaQueryToRcl: out of memory\n"));
return 0;
}
if ((*it)->m_modifiers & WasaQuery::WQM_NOSTEM)
nclause->setModifiers(Rcl::SearchDataClause::SDCM_NOSTEMMING);
sdata->addClause(nclause);
}
}
}
return sdata;
}