ObjectId.h

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/*  Copyright (C) 2008 National Institute For Space Research (INPE) - Brazil.

    This file is part of the TerraLib - a Framework for building GIS enabled applications.

    TerraLib is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License,
    or (at your option) any later version.

    TerraLib is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with TerraLib. See COPYING. If not, write to
    TerraLib Team at <terralib-team@terralib.org>.
 */

/*!
  \file terralib/dataaccess/dataset/ObjectId.h

  \brief This class represents an unique id for a data set element.
*/

#ifndef __TERRALIB_DATAACCESS_INTERNAL_OBJECTID_H
#define __TERRALIB_DATAACCESS_INTERNAL_OBJECTID_H

// TerraLib
#include "../../datatype/AbstractData.h"
#include "../Config.h"

// Boost
#include <boost/ptr_container/ptr_vector.hpp>

namespace te
{
  namespace da
  {
    /*!
      \class ObjectId

      \brief This class represents an unique id for a data set element.

      \sa AbstractData, ObjectIdSet
    */
    class TEDATAACCESSEXPORT ObjectId
    {
      public:

        /*! \brief Default constructor. */
        ObjectId();

        /*! \brief Copy constructor. */
        ObjectId(const ObjectId& rhs);

        /*! \brief Destructor. */
        ~ObjectId();

        /*!
          \brief It gets the properties values used to uniquely identify a data set element.
          
          \return A vector with the property values.

          \note The caller will NOT take the ownership of the returned pointers.
        */
        const boost::ptr_vector<te::dt::AbstractData>& getValue() const;

        /*!
          \brief It gets the properties values used to uniquely identify a data set element as string.

          \return A string that represents the set of values.
        */
        std::string getValueAsString() const;

        /*!
          \brief It adds a property value to uniquely identify a data set element.

          \param data The value of the property.

          \note This class will take the ownership of the given pointer.
        */
        void addValue(te::dt::AbstractData* data);

        ObjectId* clone() const;

        bool operator<(const ObjectId& rhs) const;

      private:

        boost::ptr_vector<te::dt::AbstractData> m_data; //!< A vector of property values.
    };

  } // end namespace da
}   // end namespace te

#endif  // __TERRALIB_DATAACCESS_INTERNAL_OBJECTID_H