ComponentFactoryByName.h

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#ifndef SimG4Core_ComponentFactoryByName_H 
#define SimG4Core_ComponentFactoryByName_H 

#include "SimG4Core/Notification/interface/SimG4Exception.h"

#include <string>
#include <map>

template <class B>
class ComponentFactoryByName
{
public:
    static B * getBuilder(const std::string & name)
    {
    if (myMap().size() == 0)
        throw SimG4Exception("No Builder registered to the Factory.");
    if (myMap().find(name) == myMap().end())
        throw SimG4Exception("The Component "+name+" is not registered to the Factory.");
    return (myMap()[name]);
    }
    static void setBuilder(B * in , const std::string & name)
    {
    if (name.empty())
        throw SimG4Exception("The registration of Components without name is not allowed.");
    myMap()[name] = in;
    }
    typedef std::map<std::string,B *> BuilderMapType;
protected:
    static BuilderMapType & myMap()
    {
    static BuilderMapType me_;
    return me_;
    }
};

#endif