UniversalDataElement.h

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#ifndef UNIVERSALDATAELEMENT_H_
#define UNIVERSALDATAELEMENT_H_

#include "DataElement.h"

class UniversalDataElement : public DataElement
{
public:
    UniversalDataElement( const UniversalURI& name, const DataValue* dataValue );

    virtual ~UniversalDataElement();

    // Get the DataValue for this DataElement.
    virtual DataValue* getDataValue( void ) const;

    virtual float getAccuracy( const Unit& unit ) const throw( UninitializedException );

    virtual float getWrittenAccuracy( const Unit& unit ) const;

    virtual bool isOrphaned( void ) const;

    //== Functions specific to the aggregator aspects of UniversalDataElement ==

    void addElement( DataElement& element );

    virtual bool isUniversal( ) const
    {
        return true;
    }

    void notifyChangeDone( Component* notifier );
    void notifyChangeDone( DataWriter* notifier );

    void recalculate( void );

    DataElement* getBestElement( DataAccessor::RequestStrategy strategy = DataAccessor::MIN_ERROR ) const;

    virtual bool wasTouchedSinceLastRun( const Component* component );

    virtual const Timestamp& getTimestamp() const;

    bool isDataRequested( DataElement* element );

    bool isAnyDataRequested();

protected:

    virtual float setAccuracy( const Unit& unit, float accuracy );

    virtual void setDataValue( DataValue* dataValue )
    {}

    DataElement *bestElement_;

    DataElement *minPowerElement_;

    DataElement *minErrorElement_;

    DataElement *minLatencyElement_;

    DataElement *maxFrequencyElement_;

    //DataValue *defaultValue_;

    float accuracy_;

    DataElementList elementList_;

    virtual float getBaseAccuracy() const
    {
        return accuracy_;
    }

private:
    // Note that the copy constructor below is private and not given a body.
    // Any attempt to call it will return a compiler error.
    UniversalDataElement( const UniversalDataElement& old ); // disallow copy constructor

};

#endif /*UNIVERSALDATAELEMENT_H_*/