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/*=========================================================================

  Program:   ParaView
  Module:    vtkClientServerID.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkClientServerID - Identifier for a ClientServer object.
// .SECTION Description
// vtkClientServerID identifies an object managed by a
// vtkClientServerInterpreter.  Although the identifier is simply an
// integer, this class allows vtkClientServerStream to identify the
// integer as an object identifier.

#ifndef vtkClientServerID_h
#define vtkClientServerID_h

#include "vtkClientServerModule.h" // Top-level vtkClientServer header.
#include "vtkSystemIncludes.h" // vtkTypeUInt32
#include "vtkIOStream.h" // Needed for operator <<

struct VTKCLIENTSERVER_EXPORT vtkClientServerID
{
  vtkClientServerID() : ID(0) {}
  explicit vtkClientServerID(vtkTypeUInt32 id) : ID(id) {}

  bool IsNull() { return this->ID == 0; }
  void SetToNull() { this->ID = 0; }

  // Convenience operators.
  bool operator<(const vtkClientServerID& i) const
    {
    return this->ID < i.ID;
    }
  bool operator==(const vtkClientServerID& i) const
    {
    return this->ID == i.ID;
    }
  bool operator!=(const vtkClientServerID& i) const
    {
    return this->ID != i.ID;
    }
  // The identifying integer.
  vtkTypeUInt32 ID;
};

VTKCLIENTSERVER_EXPORT ostream& operator<<(
  ostream& os, const vtkClientServerID& id);
VTKCLIENTSERVER_EXPORT vtkOStreamWrapper& operator<<(
  vtkOStreamWrapper& os, const vtkClientServerID& id);
                      
#endif
// VTK-HeaderTest-Exclude: vtkClientServerID.h