mirror of
https://github.com/pocoproject/poco.git
synced 2025-11-04 12:17:37 +01:00
113 lines
2.9 KiB
C++
113 lines
2.9 KiB
C++
//
|
|
// 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:
|
|
using DelegateHandle = TDelegate*;
|
|
|
|
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:
|
|
using DelegateHandle = TDelegate*;
|
|
|
|
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
|