// =========================================================================
// @author Leonardo Florez-Valencia (florez-l@javeriana.edu.co)
// =========================================================================
#ifndef __cpPlugins__DataObject__h__
#define __cpPlugins__DataObject__h__

#include <cpPlugins/Object.h>

namespace cpPlugins
{
  class ProcessObject;

  /*! \brief Base class for all data objects.
   *
   * This class is intended to be the base for all data objects. It
   * inherits from cpPlugins::Object and it serves as inputs or
   * outputs in cpPlugins::ProcessObject objects. Think of it as edges
   * in a graph.
   */
  class CPPLUGINS_EXPORT DataObject
    : public Object
  {
    cpPluginsTypeMacro( DataObject, Object );
    cpPluginsNewMacro( );

  public:
    virtual bool IsUpdated(
      const TTimeStamp& d = TTimeRep::now( )
      ) const override;

    /*! @defgroup m_Source
     * This object's source. This soft association (i.e. it could be
     * NULL) allows navigation over pipeline's (graph) edges.
     * @{
     */
    void DisconnectPipeline( );
    void SetSource( ProcessObject* source );
    void Update( );
    //! @}

  protected:
    /*! In order to correctly handle memory with std::shared_pointer<>,
     *  constructors and destructor should be "invisible" to the user.
     * @{
     */
    DataObject( );
    virtual ~DataObject( );
    //! @}

  protected:
    //! @ingroup m_Source
    std::weak_ptr< ProcessObject > m_Source;
  }; // end class
} // end namespace

#endif // __cpPlugins__DataObject__h__

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