poco/Foundation/include/Poco/NotificationStrategy.h

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//
// NotificationStrategy.h
//
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// $Id: //poco/svn/Foundation/include/Poco/NotificationStrategy.h#2 $
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//
// Library: Foundation
// Package: Events
// Module: NotificationStrategy
//
// Definition of the NotificationStrategy interface.
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#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.
{
public:
NotificationStrategy()
{
}
virtual ~NotificationStrategy()
{
}
virtual void notify(const void* sender, TArgs& arguments) = 0;
/// Sends a notification to all registered delegates,
virtual void add(const TDelegate& pDelegate) = 0;
/// Adds a delegate to the strategy, if the delegate is not yet present
virtual void remove(const TDelegate& pDelegate) = 0;
/// Removes a delegate from the strategy if found.
virtual void clear() = 0;
/// Removes all delegates from the strategy.
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virtual bool empty() const = 0;
/// Returns false if the strategy contains at least one delegate.
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};
} // namespace Poco
#endif