sitkCommand.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.
*
*=========================================================================*/
#ifndef sitkCommand_h
#define sitkCommand_h


#include "sitkCommon.h"
#include "sitkNonCopyable.h"

#include <set>

namespace itk {
namespace simple {

class ProcessObject;

class SITKCommon_EXPORT Command:
    protected NonCopyable
{
public:

  Command();

  virtual ~Command(void);

  virtual std::string GetName() const { return this->m_Name; }
  virtual void SetName(const std::string &name) { this->m_Name = name; }

  virtual void Execute(void);

protected:

  friend class itk::simple::ProcessObject;

  #ifndef SWIG
  // internal methods to maintain reference between ProcessObject and
  // Command, so when either is destroyed, the other will be notified.
  //
  // Return value is the number of referenced process objects after
  // operation.
  virtual size_t AddProcessObject(itk::simple::ProcessObject *o);
  virtual size_t RemoveProcessObject(const itk::simple::ProcessObject *o);

  virtual void SetOwnedByProcessObjects(bool o) {this->m_OwnedByProcessObjects = o;}
  virtual bool GetOwnedByProcessObjects() const {return this->m_OwnedByProcessObjects;}
  virtual void OwnedByProcessObjectsOn() {this->SetOwnedByProcessObjects(true);}
  virtual void OwnedByProcessObjectsOff() {this->SetOwnedByProcessObjects(false);}
  #endif


private:

  // a set of objects who use us
  std::set<itk::simple::ProcessObject*> m_ReferencedObjects;

  bool        m_OwnedByProcessObjects;
  std::string m_Name;
};

} // end namespace simple
} // end namespace itk

#endif