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/**
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/base/status.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/matcher/expression.h"
#include "mongo/db/query/lite_parsed_query.h"
#include "mongo/db/query/parsed_projection.h"
namespace mongo {
class CanonicalQuery {
public:
static Status canonicalize(const QueryMessage& qm, CanonicalQuery** out);
/**
* For testing or for internal clients to use.
*/
static Status canonicalize(const string& ns, const BSONObj& query, CanonicalQuery** out);
static Status canonicalize(const string& ns, const BSONObj& query, long long skip,
long long limit, CanonicalQuery** out);
static Status canonicalize(const string& ns, const BSONObj& query, const BSONObj& sort,
const BSONObj& proj, CanonicalQuery** out);
// What namespace is this query over?
const string& ns() const { return _pq->ns(); }
//
// Accessors for the query
//
MatchExpression* root() const { return _root.get(); }
BSONObj getQueryObj() const { return _pq->getFilter(); }
const LiteParsedQuery& getParsed() const { return *_pq; }
ParsedProjection* getProj() const { return _proj.get(); }
string toString() const;
private:
// You must go through canonicalize to create a CanonicalQuery.
CanonicalQuery() { }
// Takes ownership of lpq
Status init(LiteParsedQuery* lpq);
scoped_ptr<LiteParsedQuery> _pq;
scoped_ptr<ParsedProjection> _proj;
// _root points into _pq->getFilter()
scoped_ptr<MatchExpression> _root;
};
} // namespace mongo
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