MetadataElement.h

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#ifndef __BUSBOY_METADATA_ELEMENT_H__
#define __BUSBOY_METADATA_ELEMENT_H__

#include <string>

namespace BUSBOY {

class MetadataElement {

        public :
                enum Type {

                        FIELD,

                        ARRAY,

                        LIST,

                        MAP,

                        KEY 
                };

                static Type enumFromString(std::string strType);

                static std::string enumToString(Type type);

                virtual Type getMetadataElementType() const =0;

                virtual bool operator==(const MetadataElement& element) const =0;

                virtual bool operator!=(const MetadataElement& element) const =0;

        protected:

                template<typename T> static const T* castElement(const MetadataElement* element, Type type);

                template<typename T> static T* castElement(MetadataElement* element, Type type);

                template<typename T> static const T& castElement(const MetadataElement& element, Type type);

                template<typename T> static T& castElement(MetadataElement& element, Type type);
};

class CloneableMetadataElement : public MetadataElement {

        public:

                virtual CloneableMetadataElement* clone() const =0;

};

}
#endif