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FunctionFactory.h
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FunctionFactory.h
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#ifndef MANTID_API_FUNCTIONFACTORY_H_
#define MANTID_API_FUNCTIONFACTORY_H_
//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include <vector>
#include "MantidAPI/DllConfig.h"
#include "MantidKernel/DynamicFactory.h"
#include "MantidKernel/SingletonHolder.h"
#include "MantidKernel/MultiThreaded.h"
#include <boost/shared_ptr.hpp>
namespace Mantid
{
//----------------------------------------------------------------------
// Forward declarations
//----------------------------------------------------------------------
namespace Kernel
{
class Logger;
}
namespace API
{
//----------------------------------------------------------------------
// More forward declarations
//----------------------------------------------------------------------
class IFunction;
class CompositeFunction;
class Expression;
/** @class FunctionFactoryImpl
The FunctionFactory class is in charge of the creation of concrete
instances of fitting functions. It inherits most of its implementation from
the Dynamic Factory base class.
It is implemented as a singleton class.
@author Roman Tolchenov, Tessella Support Services plc
@date 27/10/2009
Copyright © 2007 ISIS Rutherford Appleton Laboratory & NScD Oak Ridge National Laboratory
This file is part of Mantid.
Mantid is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Mantid is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
File change history is stored at: <https://github.com/mantidproject/mantid>
*/
class MANTID_API_DLL FunctionFactoryImpl : public Kernel::DynamicFactory<IFunction>
{
public:
/**Creates an instance of a function
* @param type :: The function's type
* @return A pointer to the created function
*/
boost::shared_ptr<IFunction> createFunction(const std::string& type) const;
///Creates an instance of a function
boost::shared_ptr<IFunction> createInitialized(const std::string& input) const;
/// Query available functions based on the template type
template<typename FunctionType>
const std::vector<std::string>& getFunctionNames() const;
using Kernel::DynamicFactory<IFunction>::subscribe;
void subscribe(const std::string& className, AbstractFactory* pAbstractFactory,
Kernel::DynamicFactory<IFunction>::SubscribeAction replace=ErrorIfExists);
void unsubscribe(const std::string& className);
private:
friend struct Mantid::Kernel::CreateUsingNew<FunctionFactoryImpl>;
/// Private Constructor for singleton class
FunctionFactoryImpl();
/// Private copy constructor - NO COPY ALLOWED
FunctionFactoryImpl(const FunctionFactoryImpl&);
/// Private assignment operator - NO ASSIGNMENT ALLOWED
FunctionFactoryImpl& operator = (const FunctionFactoryImpl&);
///Private Destructor
virtual ~FunctionFactoryImpl();
/// These methods shouldn't be used to create functions
using Kernel::DynamicFactory<IFunction>::create;
using Kernel::DynamicFactory<IFunction>::createUnwrapped;
/// Create a simple function
boost::shared_ptr<IFunction> createSimple(
const Expression& expr,
std::map<std::string,std::string>& parentAttributes
)const;
/// Create a composite function
boost::shared_ptr<CompositeFunction> createComposite(
const Expression& expr,
std::map<std::string,std::string>& parentAttributes
)const;
/// Throw an exception
void inputError(const std::string& str="")const;
/// Add constraints to the created function
void addConstraints(boost::shared_ptr<IFunction> fun,const Expression& expr)const;
/// Add a single constraint to the created function
void addConstraint(boost::shared_ptr<IFunction> fun,const Expression& expr)const;
/// Add ties to the created function
void addTies(boost::shared_ptr<IFunction> fun,const Expression& expr)const;
/// Add a tie to the created function
void addTie(boost::shared_ptr<IFunction> fun,const Expression& expr)const;
/// Reference to the logger class
Kernel::Logger& g_log;
mutable std::map<std::string,std::vector<std::string>> m_cachedFunctionNames;
mutable Kernel::Mutex m_mutex;
};
/**
* Query available functions based on the template type
* @tparam FunctionType :: The type of the functions to list
* @returns A vector of the names of the functions matching the template type
*/
template<typename FunctionType>
const std::vector<std::string>& FunctionFactoryImpl::getFunctionNames() const
{
Kernel::Mutex::ScopedLock _lock(m_mutex);
const std::string soughtType(typeid(FunctionType).name());
if ( m_cachedFunctionNames.find( soughtType ) != m_cachedFunctionNames.end() )
{
return m_cachedFunctionNames[soughtType];
}
// Create the entry in the cache and work with it directly
std::vector<std::string>& typeNames = m_cachedFunctionNames[soughtType];
const std::vector<std::string> names = this->getKeys();
for( auto it = names.begin(); it != names.end(); ++it )
{
boost::shared_ptr<IFunction> func = this->createFunction(*it);
if ( func && dynamic_cast<FunctionType*>(func.get()) )
{
typeNames.push_back(*it);
}
}
return typeNames;
}
///Forward declaration of a specialisation of SingletonHolder for AlgorithmFactoryImpl (needed for dllexport/dllimport) and a typedef for it.
#ifdef _WIN32
// this breaks new namespace declaraion rules; need to find a better fix
template class MANTID_API_DLL Mantid::Kernel::SingletonHolder<FunctionFactoryImpl>;
#endif /* _WIN32 */
typedef MANTID_API_DLL Mantid::Kernel::SingletonHolder<FunctionFactoryImpl> FunctionFactory;
/// Convenient typedef for an UpdateNotification
typedef FunctionFactoryImpl::UpdateNotification FunctionFactoryUpdateNotification;
/// Convenient typedef for an UpdateNotification AutoPtr
typedef const Poco::AutoPtr<FunctionFactoryUpdateNotification> & FunctionFactoryUpdateNotification_ptr;
} // namespace API
} // namespace Mantid
/**
* Macro for declaring a new type of function to be used with the FunctionFactory
*/
#define DECLARE_FUNCTION(classname) \
namespace { \
Mantid::Kernel::RegistrationHelper register_function_##classname( \
((Mantid::API::FunctionFactory::Instance().subscribe<classname>(#classname)) \
, 0)); \
}
#endif /*MANTID_API_FUNCTIONFACTORY_H_*/