mitkIPropertyTransience.h

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/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
#ifndef mitkIPropertyTransience_h
#define mitkIPropertyTransience_h
 
#include <mitkBaseData.h>
#include <mitkServiceInterface.h>
 
#include <MitkCoreExports.h>
 
#include <functional>
#include <string>
#include <type_traits>
 
namespace mitk
{
  class MITKCORE_EXPORT IPropertyTransience
  {
  public:
    virtual ~IPropertyTransience();
 
    template <class TData, typename = std::enable_if_t<std::is_base_of_v<BaseData, TData>>>
    void AddTransient(const std::string &propertyName)
    {
      if constexpr (std::is_same_v<TData, BaseData>)
      {
        // A rule for BaseData applies to every node, including data-less ones
        // where data is null and a dynamic_cast would fail. Match unconditionally.
        this->InternalAddTransient(propertyName, [](const BaseData *) { return true; });
      }
      else
      {
        this->InternalAddTransient(propertyName,
                                   [](const BaseData *data) { return dynamic_cast<const TData *>(data) != nullptr; });
      }
    }
 
    virtual bool IsTransient(const BaseData *data, const std::string &propertyName) const = 0;
 
  protected:
    virtual void InternalAddTransient(const std::string &propertyName,
                                      std::function<bool(const BaseData *)> dataTypeMatcher) = 0;
  };
}
 
MITK_DECLARE_SERVICE_INTERFACE(mitk::IPropertyTransience, "org.mitk.IPropertyTransience")
 
#endif