1 | // |
2 | // DefaultStrategy.h |
3 | // |
4 | // Library: Foundation |
5 | // Package: Events |
6 | // Module: DefaultStrategy |
7 | // |
8 | // Implementation of the DefaultStrategy template. |
9 | // |
10 | // Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH. |
11 | // and Contributors. |
12 | // |
13 | // SPDX-License-Identifier: BSL-1.0 |
14 | // |
15 | |
16 | |
17 | #ifndef Foundation_DefaultStrategy_INCLUDED |
18 | #define Foundation_DefaultStrategy_INCLUDED |
19 | |
20 | |
21 | #include "Poco/NotificationStrategy.h" |
22 | #include "Poco/SharedPtr.h" |
23 | #include <vector> |
24 | |
25 | |
26 | namespace Poco { |
27 | |
28 | |
29 | template <class TArgs, class TDelegate> |
30 | class DefaultStrategy: public NotificationStrategy<TArgs, TDelegate> |
31 | /// Default notification strategy. |
32 | /// |
33 | /// Internally, a std::vector<> is used to store |
34 | /// delegate objects. Delegates are invoked in the |
35 | /// order in which they have been registered. |
36 | { |
37 | public: |
38 | typedef TDelegate* DelegateHandle; |
39 | typedef SharedPtr<TDelegate> DelegatePtr; |
40 | typedef std::vector<DelegatePtr> Delegates; |
41 | typedef typename Delegates::iterator Iterator; |
42 | |
43 | public: |
44 | DefaultStrategy() |
45 | { |
46 | } |
47 | |
48 | DefaultStrategy(const DefaultStrategy& s): |
49 | _delegates(s._delegates) |
50 | { |
51 | } |
52 | |
53 | ~DefaultStrategy() |
54 | { |
55 | } |
56 | |
57 | void notify(const void* sender, TArgs& arguments) |
58 | { |
59 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
60 | { |
61 | (*it)->notify(sender, arguments); |
62 | } |
63 | } |
64 | |
65 | DelegateHandle add(const TDelegate& delegate) |
66 | { |
67 | DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone())); |
68 | _delegates.push_back(pDelegate); |
69 | return pDelegate.get(); |
70 | } |
71 | |
72 | void remove(const TDelegate& delegate) |
73 | { |
74 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
75 | { |
76 | if (delegate.equals(**it)) |
77 | { |
78 | (*it)->disable(); |
79 | _delegates.erase(it); |
80 | return; |
81 | } |
82 | } |
83 | } |
84 | |
85 | void remove(DelegateHandle delegateHandle) |
86 | { |
87 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
88 | { |
89 | if (*it == delegateHandle) |
90 | { |
91 | (*it)->disable(); |
92 | _delegates.erase(it); |
93 | return; |
94 | } |
95 | } |
96 | } |
97 | |
98 | DefaultStrategy& operator = (const DefaultStrategy& s) |
99 | { |
100 | if (this != &s) |
101 | { |
102 | _delegates = s._delegates; |
103 | } |
104 | return *this; |
105 | } |
106 | |
107 | void clear() |
108 | { |
109 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
110 | { |
111 | (*it)->disable(); |
112 | } |
113 | _delegates.clear(); |
114 | } |
115 | |
116 | bool empty() const |
117 | { |
118 | return _delegates.empty(); |
119 | } |
120 | |
121 | protected: |
122 | Delegates _delegates; |
123 | }; |
124 | |
125 | |
126 | template <class TDelegate> |
127 | class DefaultStrategy<void,TDelegate>: public NotificationStrategy<void, TDelegate> |
128 | /// Default notification strategy. |
129 | /// |
130 | /// Internally, a std::vector<> is used to store |
131 | /// delegate objects. Delegates are invoked in the |
132 | /// order in which they have been registered. |
133 | { |
134 | public: |
135 | typedef TDelegate* DelegateHandle; |
136 | typedef SharedPtr<TDelegate> DelegatePtr; |
137 | typedef std::vector<DelegatePtr> Delegates; |
138 | typedef typename Delegates::iterator Iterator; |
139 | |
140 | public: |
141 | DefaultStrategy() |
142 | { |
143 | } |
144 | |
145 | DefaultStrategy(const DefaultStrategy& s): |
146 | _delegates(s._delegates) |
147 | { |
148 | } |
149 | |
150 | ~DefaultStrategy() |
151 | { |
152 | } |
153 | |
154 | void notify(const void* sender) |
155 | { |
156 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
157 | { |
158 | (*it)->notify(sender); |
159 | } |
160 | } |
161 | |
162 | DelegateHandle add(const TDelegate& delegate) |
163 | { |
164 | DelegatePtr pDelegate(static_cast<TDelegate*>(delegate.clone())); |
165 | _delegates.push_back(pDelegate); |
166 | return pDelegate.get(); |
167 | } |
168 | |
169 | void remove(const TDelegate& delegate) |
170 | { |
171 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
172 | { |
173 | if (delegate.equals(**it)) |
174 | { |
175 | (*it)->disable(); |
176 | _delegates.erase(it); |
177 | return; |
178 | } |
179 | } |
180 | } |
181 | |
182 | void remove(DelegateHandle delegateHandle) |
183 | { |
184 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
185 | { |
186 | if (*it == delegateHandle) |
187 | { |
188 | (*it)->disable(); |
189 | _delegates.erase(it); |
190 | return; |
191 | } |
192 | } |
193 | } |
194 | |
195 | DefaultStrategy& operator = (const DefaultStrategy& s) |
196 | { |
197 | if (this != &s) |
198 | { |
199 | _delegates = s._delegates; |
200 | } |
201 | return *this; |
202 | } |
203 | |
204 | void clear() |
205 | { |
206 | for (Iterator it = _delegates.begin(); it != _delegates.end(); ++it) |
207 | { |
208 | (*it)->disable(); |
209 | } |
210 | _delegates.clear(); |
211 | } |
212 | |
213 | bool empty() const |
214 | { |
215 | return _delegates.empty(); |
216 | } |
217 | |
218 | protected: |
219 | Delegates _delegates; |
220 | }; |
221 | |
222 | |
223 | } // namespace Poco |
224 | |
225 | |
226 | #endif // Foundation_DefaultStrategy_INCLUDED |
227 | |