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