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/** @file queryparser_internal.h
* @brief The non-lemon-generated parts of the QueryParser class.
*/
/* Copyright (C) 2005,2006,2007,2010,2011,2012,2013,2015,2016 Olly Betts
* Copyright (C) 2010 Adam Sjøgren
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifndef XAPIAN_INCLUDED_QUERYPARSER_INTERNAL_H
#define XAPIAN_INCLUDED_QUERYPARSER_INTERNAL_H
#include "xapian/intrusive_ptr.h"
#include <xapian/database.h>
#include <xapian/query.h>
#include <xapian/queryparser.h>
#include <xapian/stem.h>
#include <list>
#include <map>
using namespace std;
class State;
typedef enum { NON_BOOLEAN, BOOLEAN, BOOLEAN_EXCLUSIVE } filter_type;
/** Information about how to handle a field prefix in the query string. */
struct FieldInfo {
/// The type of this field.
filter_type type;
string grouping;
/// Field prefix strings.
list<string> prefixes;
/// Field processors. Currently only one is supported.
list<Xapian::Internal::opt_intrusive_ptr<Xapian::FieldProcessor> > procs;
FieldInfo(filter_type type_, const string& prefix,
const string& grouping_ = string())
: type(type_), grouping(grouping_)
{
prefixes.push_back(prefix);
}
FieldInfo(filter_type type_, Xapian::FieldProcessor* proc,
const string& grouping_ = string())
: type(type_), grouping(grouping_)
{
procs.push_back(proc);
}
};
namespace Xapian {
class Utf8Iterator;
struct RangeProc {
Xapian::Internal::opt_intrusive_ptr<RangeProcessor> proc;
std::string grouping;
bool default_grouping;
RangeProc(RangeProcessor * range_proc, const std::string* grouping_)
: proc(range_proc),
grouping(grouping_ ? *grouping_ : std::string()),
default_grouping(grouping_ == NULL) { }
};
class QueryParser::Internal : public Xapian::Internal::intrusive_base {
friend class QueryParser;
friend class ::State;
Stem stemmer;
stem_strategy stem_action;
Xapian::Internal::opt_intrusive_ptr<const Stopper> stopper;
Query::op default_op;
const char * errmsg;
Database db;
list<string> stoplist;
multimap<string, string> unstem;
// Map "from" -> "A" ; "subject" -> "C" ; "newsgroups" -> "G" ;
// "foobar" -> "XFOO". FIXME: it does more than this now!
map<string, FieldInfo> field_map;
list<RangeProc> rangeprocs;
string corrected_query;
Xapian::termcount max_wildcard_expansion;
Xapian::termcount max_partial_expansion;
int max_wildcard_type;
int max_partial_type;
void add_prefix(const string &field, const string &prefix);
void add_prefix(const string &field, Xapian::FieldProcessor *proc);
void add_boolean_prefix(const string &field, const string &prefix,
const string* grouping);
void add_boolean_prefix(const string &field, Xapian::FieldProcessor *proc,
const string* grouping);
std::string parse_term(Utf8Iterator &it, const Utf8Iterator &end,
bool cjk_ngram, bool &is_cjk_term,
bool &was_acronym);
public:
Internal() : stem_action(STEM_SOME), stopper(NULL),
default_op(Query::OP_OR), errmsg(NULL),
max_wildcard_expansion(0), max_partial_expansion(100),
max_wildcard_type(Xapian::Query::WILDCARD_LIMIT_ERROR),
max_partial_type(Xapian::Query::WILDCARD_LIMIT_MOST_FREQUENT) { }
Query parse_query(const string & query_string, unsigned int flags, const string & default_prefix);
};
}
#endif // XAPIAN_INCLUDED_QUERYPARSER_INTERNAL_H
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