itkDataObjectDecorator.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
/*=========================================================================
 *
 *  Portions of this file are subject to the VTK Toolkit Version 3 copyright.
 *
 *  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
 *
 *  For complete copyright, license and disclaimer of warranty information
 *  please refer to the NOTICE file at the top of the ITK source tree.
 *
 *=========================================================================*/
#ifndef itkDataObjectDecorator_h
#define itkDataObjectDecorator_h

#include "itkDataObject.h"
#include "itkObjectFactory.h"

namespace itk
{
template< typename T >
class ITK_TEMPLATE_EXPORT DataObjectDecorator:public DataObject
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(DataObjectDecorator);

  using Self = DataObjectDecorator;
  using Superclass = DataObject;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using ComponentType = T;
  using ComponentPointer = typename T::Pointer;
  using ComponentConstPointer = typename T::ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(DataObjectDecorator, DataObject);

  virtual void Set( const ComponentType *val);

  virtual const ComponentType * Get() const;
  virtual ComponentType * GetModifiable();

  ModifiedTimeType GetMTime() const override;

  void Initialize() override;

  void Graft( const DataObject * ) override;
  void Graft( const Self * decorator );

  template <typename TOther>
  void Graft( const DataObjectDecorator<TOther> * decorator )
    {
      auto * component = const_cast< ComponentType * >( dynamic_cast< const ComponentType * >( decorator->Get() ) );
      if ( !component  )
        {
        return;
        }
      this->Set( component );
    }

protected:
  DataObjectDecorator() = default;
  ~DataObjectDecorator() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

protected:

private:
  ComponentPointer m_Component;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkDataObjectDecorator.hxx"
#endif

#endif