// -*- C++ -*-


 namespace Hurricane {

 /*! \class        DataBase
  *  \brief        The whole DataBase (\b API).
  *
  *                The unique purpose of this object is to handle, at
  *                any time, directly or indirectly, the whole set of
  *                currently allocated objects of the data base.
  *
  *                This is a singleton object, only one can exist at a
  *                given time.
  *                
  *                The data base must be created explicitely (it is
  *                possible to derive a sub-type with specific
  *                additional attributes, or use properties to store
  *                them).
  *
  *                The Database object handles both the Technology
  *                and the root Library.
  *
  *  \caution      Destroying the DataBase object destroys all data base objects.
  */


 /*! \function     DataBase* DataBase::create ();
  *                creates and returns a pointer to a new DataBase.
  *
  *  \caution      An exception is thrown if a Database already exists.
  */


 /*! \function     DataBase* DataBase::getDB ();
  *                This static function returns the current
  *                DataBase, if it has been created and not destroyed,
  *                else \NULL.
  */

 /*! \function     Technology* DataBase::getTechnology () const;
  *  \return       the Technology if it exists, else \NULL.
  */

 /*! \function     Technology* DataBase::getRootLibrary () const;
  *  \return       the root Library if it exists, else \NULL.
  */

 }