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131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
//
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// AbstractDelegate.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/AbstractDelegate.h#4 $
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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) 2006-2011, 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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/// Base class for Delegate and Expire.
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{
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public:
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AbstractDelegate()
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{
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}
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AbstractDelegate(const AbstractDelegate& /*del*/)
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{
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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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/// Invokes the delegate's callback function.
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/// Returns true if successful, or false if the delegate
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/// has been disabled or has expired.
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virtual bool equals(const AbstractDelegate& other) const = 0;
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/// Compares the AbstractDelegate with the other one for equality.
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virtual AbstractDelegate* clone() const = 0;
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/// Returns a deep copy of the AbstractDelegate.
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virtual void disable() = 0;
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/// Disables the delegate, which is done prior to removal.
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virtual const AbstractDelegate* unwrap() const
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/// Returns the unwrapped delegate. Must be overridden by decorators
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/// like Expire.
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{
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return this;
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}
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};
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template <>
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class AbstractDelegate<void>
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/// Base class for Delegate and Expire.
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{
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public:
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AbstractDelegate()
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{
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}
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AbstractDelegate(const AbstractDelegate& del)
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{
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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) = 0;
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/// Invokes the delegate's callback function.
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/// Returns true if successful, or false if the delegate
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/// has been disabled or has expired.
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virtual bool equals(const AbstractDelegate& other) const = 0;
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/// Compares the AbstractDelegate with the other one for equality.
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virtual AbstractDelegate* clone() const = 0;
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/// Returns a deep copy of the AbstractDelegate.
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virtual void disable() = 0;
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/// Disables the delegate, which is done prior to removal.
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virtual const AbstractDelegate* unwrap() const
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/// Returns the unwrapped delegate. Must be overridden by decorators
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/// like Expire.
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{
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return this;
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}
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};
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} // namespace Poco
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#endif // Foundation_AbstractDelegate_INCLUDED
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