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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
// expression_parser_tree.cpp
/**
* 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault
#include "mongo/db/matcher/expression_parser.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/bsonobjiterator.h"
#include "mongo/db/matcher/expression_array.h"
#include "mongo/db/matcher/expression_leaf.h"
#include "mongo/db/matcher/expression_tree.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
// static
const int MatchExpressionParser::kMaximumTreeDepth = 100;
Status MatchExpressionParser::_parseTreeList( const BSONObj& arr,
ListOfMatchExpression* out,
int level ) {
if ( arr.isEmpty() )
return Status( ErrorCodes::BadValue,
"$and/$or/$nor must be a nonempty array" );
BSONObjIterator i( arr );
while ( i.more() ) {
BSONElement e = i.next();
if ( e.type() != Object )
return Status( ErrorCodes::BadValue,
"$or/$and/$nor entries need to be full objects" );
StatusWithMatchExpression sub = _parse( e.Obj(), level );
if ( !sub.isOK() )
return sub.getStatus();
out->add( sub.getValue() );
}
return Status::OK();
}
StatusWithMatchExpression MatchExpressionParser::_parseNot( const char* name,
const BSONElement& e,
int level ) {
if ( e.type() == RegEx ) {
StatusWithMatchExpression s = _parseRegexElement( name, e );
if ( !s.isOK() )
return s;
std::auto_ptr<NotMatchExpression> n( new NotMatchExpression() );
Status s2 = n->init( s.getValue() );
if ( !s2.isOK() )
return StatusWithMatchExpression( s2 );
return StatusWithMatchExpression( n.release() );
}
if ( e.type() != Object )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$not needs a regex or a document" );
BSONObj notObject = e.Obj();
if ( notObject.isEmpty() )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$not cannot be empty" );
std::auto_ptr<AndMatchExpression> theAnd( new AndMatchExpression() );
Status s = _parseSub( name, notObject, theAnd.get(), level );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
// TODO: this seems arbitrary?
// tested in jstests/not2.js
for ( unsigned i = 0; i < theAnd->numChildren(); i++ )
if ( theAnd->getChild(i)->matchType() == MatchExpression::REGEX )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$not cannot have a regex" );
std::auto_ptr<NotMatchExpression> theNot( new NotMatchExpression() );
s = theNot->init( theAnd.release() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( theNot.release() );
}
}
|