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81 lines
1.5 KiB
C++
81 lines
1.5 KiB
C++
//
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// Instantiator.h
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//
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// Library: Foundation
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// Package: Core
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// Module: Instantiator
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//
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// Definition of the Instantiator class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_Instantiator_INCLUDED
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#define Foundation_Instantiator_INCLUDED
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#include "Poco/Foundation.h"
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namespace Poco
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{
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template <class Base>
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class AbstractInstantiator
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/// The common base class for all Instantiator instantiations.
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/// Used by DynamicFactory.
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{
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public:
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AbstractInstantiator()
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/// Creates the AbstractInstantiator.
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{
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}
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virtual ~AbstractInstantiator()
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/// Destroys the AbstractInstantiator.
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{
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}
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virtual Base * createInstance() const = 0;
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/// Creates an instance of a concrete subclass of Base.
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private:
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AbstractInstantiator(const AbstractInstantiator &);
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AbstractInstantiator & operator=(const AbstractInstantiator &);
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};
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template <class C, class Base>
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class Instantiator : public AbstractInstantiator<Base>
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/// A template class for the easy instantiation of
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/// instantiators.
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///
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/// For the Instantiator to work, the class of which
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/// instances are to be instantiated must have a no-argument
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/// constructor.
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{
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public:
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Instantiator()
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/// Creates the Instantiator.
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{
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}
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virtual ~Instantiator()
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/// Destroys the Instantiator.
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{
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}
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Base * createInstance() const { return new C; }
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};
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} // namespace Poco
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#endif // Foundation_Instantiator_INCLUDED
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