blob: d36fbe28b038e7e3a14f02913958d0051e93c39d (
plain) (
blame)
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
|
//
// NotificationStrategy.h
//
// Library: Foundation
// Package: Events
// Module: NotificationStrategy
//
// Definition of the NotificationStrategy interface.
//
// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_NotificationStrategy_INCLUDED
#define Foundation_NotificationStrategy_INCLUDED
#include "Poco/Foundation.h"
namespace Poco {
template <class TArgs, class TDelegate>
class NotificationStrategy
/// The interface that all notification strategies must implement.
///
/// Note: Event is based on policy-driven design, so every strategy implementation
/// must provide all the methods from this interface (otherwise: compile errors)
/// but does not need to inherit from NotificationStrategy.
{
public:
typedef TDelegate* DelegateHandle;
NotificationStrategy()
{
}
virtual ~NotificationStrategy()
{
}
virtual void notify(const void* sender, TArgs& arguments) = 0;
/// Sends a notification to all registered delegates.
virtual DelegateHandle add(const TDelegate& delegate) = 0;
/// Adds a delegate to the strategy.
virtual void remove(const TDelegate& delegate) = 0;
/// Removes a delegate from the strategy, if found.
/// Does nothing if the delegate has not been added.
virtual void remove(DelegateHandle delegateHandle) = 0;
/// Removes a delegate from the strategy, if found.
/// Does nothing if the delegate has not been added.
virtual void clear() = 0;
/// Removes all delegates from the strategy.
virtual bool empty() const = 0;
/// Returns false if the strategy contains at least one delegate.
};
template <class TDelegate>
class NotificationStrategy<void, TDelegate>
/// The interface that all notification strategies must implement.
///
/// Note: Event is based on policy-driven design, so every strategy implementation
/// must provide all the methods from this interface (otherwise: compile errors)
/// but does not need to inherit from NotificationStrategy.
{
public:
typedef TDelegate* DelegateHandle;
NotificationStrategy()
{
}
virtual ~NotificationStrategy()
{
}
virtual void notify(const void* sender) = 0;
/// Sends a notification to all registered delegates.
virtual DelegateHandle add(const TDelegate& delegate) = 0;
/// Adds a delegate to the strategy.
virtual void remove(const TDelegate& delegate) = 0;
/// Removes a delegate from the strategy, if found.
/// Does nothing if the delegate has not been added.
virtual void remove(DelegateHandle delegateHandle) = 0;
/// Removes a delegate from the strategy, if found.
/// Does nothing if the delegate has not been added.
virtual void clear() = 0;
/// Removes all delegates from the strategy.
virtual bool empty() const = 0;
/// Returns false if the strategy contains at least one delegate.
};
} // namespace Poco
#endif // Foundation_NotificationStrategy_INCLUDED
|
