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#ifndef ADHOCUTIL_FACTORY_H
#define ADHOCUTIL_FACTORY_H
#include "plugins.h"
#include "visibility.h"
namespace AdHoc {
/**
* Base class for factories creating instances of Base.
*/
template <typename Base, typename ... Params>
class DLL_PUBLIC Factory {
public:
virtual ~Factory() = 0;
/**
* Create a new instance of Base, overridden in a subclass to construct a new specific class.
* @param p The parameters passed to Impl constructor.
*/
virtual Base * create(const Params & ... p) const = 0;
/**
* A factory for a concrete implementation of Base
*/
template <typename Impl, typename _ = Factory<Base, Params...>>
class DLL_PUBLIC For : public _
{
public:
/**
* Create a new instance of Base implemented in Impl.
* @param p The parameters passed to Impl constructor.
*/
Base * create(const Params & ... p) const override
{
return new Impl(p...);
}
};
/**
* Helper to get the factory for a specific implementation.
* @param name The name of the implementation.
*/
static const Factory * get(const std::string & name);
/**
* Helper to create a new instance from a specific factory.
* @param name The name of the implementation.
* @param p The parameters to pass to the constructor.
*/
static Base * create(const std::string & name, const Params & ... p);
};
}
#define NAMEDFACTORY(Name, Implementation, BaseFactory) \
NAMEDPLUGIN(Name, BaseFactory::For<Implementation>, BaseFactory)
#define FACTORY(Implementation, BaseFactory) \
NAMEDFACTORY(#Implementation, Implementation, BaseFactory)
#endif
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