#ifndef __CPPLUGINS__INTERFACE__PROCESSOBJECT__H__
#define __CPPLUGINS__INTERFACE__PROCESSOBJECT__H__

#include <map>
#include <set>

#include <itkDataObject.h>
#include <cpPlugins/Interface/ProcessObjectPort.h>
#include <cpPlugins/Interface/Parameters.h>

// Some forward declarations
class vtkRenderWindowInteractor;

namespace cpPlugins
{
  namespace Interface
  {
    // Some forward declarations
#ifdef cpPlugins_Interface_QT4
    class ParametersQtDialog;
    class SimpleMPRWidget;
#else
    typedef char ParametersQtDialog;
    typedef char SimpleMPRWidget;
#endif // cpPlugins_Interface_QT4

    /**
     */
    class cpPlugins_Interface_EXPORT ProcessObject
      : public Object
    {
    public:
      typedef ProcessObject                   Self;
      typedef Object                          Superclass;
      typedef itk::SmartPointer< Self >       Pointer;
      typedef itk::SmartPointer< const Self > ConstPointer;

      typedef Parameters TParameters;
      typedef std::set< vtkRenderWindowInteractor* > TInteractors;
      typedef bool DialogResult;

    public:
      itkTypeMacro( ProcessObject, Object );
      cpPlugins_Id_Macro( ProcessObject, BaseObject );

      itkGetConstObjectMacro( Parameters, TParameters );

      itkGetObjectMacro( Parameters, TParameters );
      itkGetMacro( ParametersDialog, ParametersQtDialog* );
      itkGetMacro( SingleInteractor, vtkRenderWindowInteractor* );
      itkGetMacro( MPRViewer, SimpleMPRWidget* );

      itkSetObjectMacro( ParametersDialog, ParametersQtDialog );
      itkSetObjectMacro( SingleInteractor, vtkRenderWindowInteractor );
      itkSetObjectMacro( MPRViewer, SimpleMPRWidget );

    public:
      virtual void SetITK( itk::LightObject* o );
      virtual void SetVTK( vtkObjectBase* o );

      // IO management
      std::set< std::string > GetInputsNames( ) const;
      std::set< std::string > GetOutputsNames( ) const;
      unsigned int GetNumberOfInputs( ) const;
      unsigned int GetNumberOfOutputs( ) const;

      OutputProcessObjectPort& GetOutput( const std::string& id );
      const OutputProcessObjectPort& GetOutput( const std::string& id ) const;

      template< class T >
        inline T* GetInputData( const std::string& id );
      template< class T >
        inline const T* GetInputData( const std::string& id ) const;
      template< class T >
        inline T* GetOutputData( const std::string& id );
      template< class T >
        inline const T* GetOutputData( const std::string& id ) const;

      bool SetInput(
        const std::string& id, const OutputProcessObjectPort& port
        );

      void DisconnectInputs( );
      void DisconnectOutputs( );
      void Disconnect( );

      // Pipeline execution
      virtual itk::ModifiedTimeType GetMTime( ) const;
      virtual std::string Update( );

    protected:
      ProcessObject( );
      virtual ~ProcessObject( );

      void _AddInput( const std::string& name, bool required = true );
      template< class O >
        inline void _AddOutput( const std::string& name );
      template< class F >
        inline F* _CreateITK( );
      template< class F >
        inline F* _CreateVTK( );

      virtual std::string _GenerateData( ) = 0;

    private:
      // Purposely not implemented
      ProcessObject( const Self& );
      Self& operator=( const Self& );

    protected:
      typedef std::map< std::string, InputProcessObjectPort >  _TInputs;
      typedef std::map< std::string, OutputProcessObjectPort > _TOutputs;
      _TInputs  m_Inputs;
      _TOutputs m_Outputs;
      Parameters::Pointer m_Parameters;

      itk::ModifiedTimeType m_LastExecutionTime;

      ParametersQtDialog*        m_ParametersDialog;
      vtkRenderWindowInteractor* m_SingleInteractor;
      SimpleMPRWidget*           m_MPRViewer;
    };

  } // ecapseman

} // ecapseman

#include <cpPlugins/Interface/ProcessObject.hxx>

#endif // __CPPLUGINS__INTERFACE__PROCESSOBJECT__H__

// eof - $RCSfile$