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//# EclecticFunctionFactory.cc: a class for creating various Function objects from Records
//# Copyright (C) 2002
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#ifndef SCIMATH_ECLECTICFUNCTIONFACTORY_H
#define SCIMATH_ECLECTICFUNCTIONFACTORY_H
#include <casacore/casa/aips.h>
#include <casacore/scimath/Functionals/Function.h>
#include <casacore/casa/Containers/OrderedMap.h>
#include <casacore/casa/Containers/OrderedPair.h>
#include <casacore/casa/Exceptions/Error.h>
#include <casacore/scimath/Functionals/AbstractFunctionFactory.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
class Record;
// <summary>
//
//
//
//
//
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
// <prerequisite>
// <li> FunctionFactory
// </prerequisite>
//
// <etymology>
// This class is based on the Factory pattern, similar to the
// ApplicationObjectFactory
// </etymology>
//
// <synopsis>
//
//
//
//
// </synopsis>
//
// <example>
//
//
//
// </example>
//
// <motivation>
//
//
//
// </motivation>
//
// <templating arg=T>
// <li> Function must have a constructor for the form T(const Record&)
// </templating>
//
// <thrown>
// <li> UnrecognizedFunctionError by create() if the Record field
// "functype" does not match a Function added via addFactory()
// <li> InvalidSerializationError by create() if
// <ul>
// <li> Record does not contain a "functype" field containing
// a string
// <li> the associated specific factory throws an
// InvalidSerializationError
// </ul>
// </thrown>
//
// <todo asof="yyyy/mm/dd">
// <li>
// <li>
// <li>
// </todo>
template<class T>
class EclecticFunctionFactory : public FunctionFactory<T>
{
public:
// create an empty EclecticFunctionFactory
EclecticFunctionFactory();
// create a shallow copy of another EclecticFunctionFactory
EclecticFunctionFactory(const EclecticFunctionFactory& factory);
// delete this EclecticFunctionFactory. Those specific factories added
// via addFactory() with <em>own=True</em> will be deleted.
virtual ~EclecticFunctionFactory();
// create the Function object described in the given Record. This
// implementation will use the value of the "functype" field to lookup
// the specific factory to use to create the function. That is, the
// the "functype" value will be matched against the type names loaded
// via addFactory().
virtual Function<T> *create(const Record&) const
throw(FunctionFactoryError);
// add a factory for creating a specific type of function, associating
// it with a given "functype" name.
void addFactory(const String& type, FunctionFactory<T> *factory,
Bool own=True);
// return the number of factories that have been loaded thus far.
Int ndefined() { return lookup.ndefined(); }
// return True if a factory with a given "functype" name has been
// loaded.
Bool isDefined(const String& type) { return lookup.isDefined(type); }
// a shallow assignment operator
EclecticFunctionFactory& operator=(const EclecticFunctionFactory& factory);
protected:
private:
OrderedMap<String, OrderedPair<FunctionFactory<T>*, Bool> > lookup;
};
} //# NAMESPACE CASACORE - END
#ifndef CASACORE_NO_AUTO_TEMPLATES
#include <casacore/scimath/Functionals/EclecticFunctionFactory.tcc>
#endif //# CASACORE_NO_AUTO_TEMPLATES
#endif
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