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97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
//
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// AbstractDelegate.h
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//
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// $Id: //poco/1.2/Foundation/include/Poco/AbstractDelegate.h#2 $
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//
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// Library: Foundation
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// Package: Events
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// Module: AbstractDelegate
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//
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// Implementation of the AbstractDelegate template.
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//
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// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_AbstractDelegate_INCLUDED
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#define Foundation_AbstractDelegate_INCLUDED
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#include "Poco/Foundation.h"
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namespace Poco {
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template <class TArgs>
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class AbstractDelegate
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/// Interface for Delegate and Expire
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/// Very similar to AbstractPriorityDelegate but having two separate files (no inheritance)
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/// allows one to have compile-time checks when registering an observer
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/// instead of run-time checks.
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{
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public:
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AbstractDelegate(void* pTarget): _pTarget(pTarget)
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{
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poco_assert_dbg (_pTarget != 0);
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}
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AbstractDelegate(const AbstractDelegate& del):_pTarget(del._pTarget)
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{
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poco_assert_dbg (_pTarget != 0);
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}
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virtual ~AbstractDelegate()
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{
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}
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virtual bool notify(const void* sender, TArgs& arguments) = 0;
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/// Returns false, if the Delegate is no longer valid, thus indicating an expire
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virtual AbstractDelegate* clone() const = 0;
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/// Returns a deep-copy of the AbstractDelegate
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bool operator < (const AbstractDelegate<TArgs>& other) const
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/// For comparing AbstractDelegates in a collection.
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{
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return _pTarget < other._pTarget;
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}
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void* target() const
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{
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return _pTarget;
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}
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protected:
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void* _pTarget;
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};
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} // namespace Poco
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#endif
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