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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/* Copyright 2012 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 <iosfwd>
#include <memory>
#include <string>
#include "mongo/base/disallow_copying.h"
#include "mongo/base/string_data.h"
namespace mongo {
/**
* Representation of a name of a principal (authenticatable user) in a MongoDB system.
*
* Consists of a "user name" part, and a "database name" part.
*/
class UserName {
public:
UserName() : _splitPoint(0) {}
UserName(StringData user, StringData dbname);
/**
* Gets the user part of a UserName.
*/
StringData getUser() const {
return StringData(_fullName).substr(0, _splitPoint);
}
/**
* Gets the database name part of a UserName.
*/
StringData getDB() const {
return StringData(_fullName).substr(_splitPoint + 1);
}
/**
* Gets the full unique name of a user as a string, formatted as "user@db".
*/
const std::string& getFullName() const {
return _fullName;
}
/**
* Stringifies the object, for logging/debugging.
*/
std::string toString() const {
return getFullName();
}
private:
std::string _fullName; // The full name, stored as a string. "user@db".
size_t _splitPoint; // The index of the "@" separating the user and db name parts.
};
static inline bool operator==(const UserName& lhs, const UserName& rhs) {
return lhs.getFullName() == rhs.getFullName();
}
static inline bool operator!=(const UserName& lhs, const UserName& rhs) {
return lhs.getFullName() != rhs.getFullName();
}
static inline bool operator<(const UserName& lhs, const UserName& rhs) {
return lhs.getFullName() < rhs.getFullName();
}
std::ostream& operator<<(std::ostream& os, const UserName& name);
/**
* Iterator over an unspecified container of UserName objects.
*/
class UserNameIterator {
public:
class Impl {
MONGO_DISALLOW_COPYING(Impl);
public:
Impl(){};
virtual ~Impl(){};
static Impl* clone(Impl* orig) {
return orig ? orig->doClone() : NULL;
}
virtual bool more() const = 0;
virtual const UserName& get() const = 0;
virtual const UserName& next() = 0;
private:
virtual Impl* doClone() const = 0;
};
UserNameIterator() : _impl(nullptr) {}
UserNameIterator(const UserNameIterator& other) : _impl(Impl::clone(other._impl.get())) {}
explicit UserNameIterator(Impl* impl) : _impl(impl) {}
UserNameIterator& operator=(const UserNameIterator& other) {
_impl.reset(Impl::clone(other._impl.get()));
return *this;
}
bool more() const {
return _impl.get() && _impl->more();
}
const UserName& get() const {
return _impl->get();
}
const UserName& next() {
return _impl->next();
}
const UserName& operator*() const {
return get();
}
const UserName* operator->() const {
return &get();
}
private:
std::unique_ptr<Impl> _impl;
};
template <typename ContainerIterator>
class UserNameContainerIteratorImpl : public UserNameIterator::Impl {
MONGO_DISALLOW_COPYING(UserNameContainerIteratorImpl);
public:
UserNameContainerIteratorImpl(const ContainerIterator& begin, const ContainerIterator& end)
: _curr(begin), _end(end) {}
virtual ~UserNameContainerIteratorImpl() {}
virtual bool more() const {
return _curr != _end;
}
virtual const UserName& next() {
return *(_curr++);
}
virtual const UserName& get() const {
return *_curr;
}
virtual UserNameIterator::Impl* doClone() const {
return new UserNameContainerIteratorImpl(_curr, _end);
}
private:
ContainerIterator _curr;
ContainerIterator _end;
};
template <typename ContainerIterator>
UserNameIterator makeUserNameIterator(const ContainerIterator& begin,
const ContainerIterator& end) {
return UserNameIterator(new UserNameContainerIteratorImpl<ContainerIterator>(begin, end));
}
template <typename Container>
UserNameIterator makeUserNameIteratorForContainer(const Container& container) {
return makeUserNameIterator(container.begin(), container.end());
}
} // namespace mongo
|
