/*
 * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef OBJECT_ID_H
#define OBJECT_ID_H


#include <Referenceable.h>


class ObjectID : public BReferenceable {
public:
                                                                ObjectID();
        virtual                                         ~ObjectID();

        inline  uint32                          HashValue() const;

        virtual bool                            operator==(const ObjectID& other) const = 0;
        inline  bool                            operator!=(const ObjectID& other) const;

protected:
        virtual uint32                          ComputeHashValue() const = 0;

protected:
        mutable uint32                          fHashValue;
};


uint32
ObjectID::HashValue() const
{
        if (fHashValue == 0)
                fHashValue = ComputeHashValue();
        return fHashValue;
}


bool
ObjectID::operator!=(const ObjectID& other) const
{
        return !(*this == other);
}


#endif  // OBJECT_ID_H