SegmentationFactory.h

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/*
 * SegmentationFactory.h
 *
 * Factory and helper classes to allow instantiation of segmentations by name.
 *
 *  Created on: Dec 15, 2013
 *      Author: Christian Grefe, CERN
 */

#ifndef DDSegmentation_SEGMENTATIONFACTORY_H_
#define DDSegmentation_SEGMENTATIONFACTORY_H_

#include "DDSegmentation/Segmentation.h"

#include <map>
#include <vector>
#include <string>

namespace DD4hep {
namespace DDSegmentation {

class Segmentation;
class SegmentationCreatorBase;

class SegmentationCreatorBase {
public:
        SegmentationCreatorBase(const std::string& name);
        virtual ~SegmentationCreatorBase() {};
        virtual Segmentation* create(const std::string& identifier) const = 0;
};

template<class TYPE> class SegmentationCreator : public SegmentationCreatorBase {
public:
        SegmentationCreator<TYPE>(const std::string& name) : SegmentationCreatorBase(name) {};
        virtual ~SegmentationCreator() {};
        Segmentation* create(const std::string& identifier) const {return new TYPE(identifier);};
};

class SegmentationFactory {
        friend class SegmentationCreatorBase;
public:
        static SegmentationFactory* instance();
        Segmentation* create(const std::string& name, const std::string& identifier = "") const;
        std::vector<std::string> registeredSegmentations() const;
protected:
        SegmentationFactory() {};
        SegmentationFactory(const SegmentationFactory&) {};
        virtual ~SegmentationFactory() {};
        void registerSegmentation(const std::string& name, SegmentationCreatorBase* creator);
        std::map<std::string, SegmentationCreatorBase*> _segmentations;
private:
        static SegmentationFactory* _instance;
};

} /* namespace DDSegmentation */
} /* namespace DD4hep */
#endif /* DDSegmentation_SEGMENTATIONFACTORY_H_ */