blob: dda08dd4a454efea23053e6f5a009d336114d695 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/**
* 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/>.
*/
#pragma once
#include "mongo/db/exec/working_set.h"
#include "mongo/db/jsobj.h"
namespace mongo {
/**
* An interface for projecting (modifying) a WSM.
* TODO: Add unit test.
*/
class QueryProjection {
public:
virtual ~QueryProjection() { }
/**
* Compute the projection over the WSM. Place the output in 'out'.
*/
virtual Status project(const WorkingSetMember& wsm, BSONObj* out) = 0;
/**
* This projection handles the inclusion/exclusion syntax of the .find() command.
* For details, see http://docs.mongodb.org/manual/reference/method/db.collection.find/
*/
static Status newInclusionExclusion(const BSONObj& inclExcl, QueryProjection** out);
};
} // namespace mongo
|
