Method operator[]

Modules/AlgorithmsExt/src/mitkSimpleHistogram.cpp:94–155

  };

  SimpleHistogram *SimpleHistogramCache::operator[](BaseData::Pointer sp_BaseData)
  {
    BaseData *p_BaseData = sp_BaseData.GetPointer();

    if (!p_BaseData)
    {
      MITK_WARN << "SimpleHistogramCache::operator[] with null base data called";
      return nullptr;
    }

    Element *elementToUpdate = nullptr;

    bool first = true;

    for (auto iter = cache.begin(); iter != cache.end(); iter++)
    {
      Element *e = *iter;
      BaseData *p_tmp = e->baseData.Lock();

      if (p_tmp == p_BaseData)
      {
        if (!first)
        {
          cache.erase(iter);
          cache.push_front(e);
        }
        if (p_BaseData->GetMTime() > e->m_LastUpdateTime.GetMTime())
        {
          elementToUpdate = e;
          goto recomputeElement;
        }

        // MITK_INFO << "using a cached histogram";

        return e->GetHistogram();
      }

      first = false;
    }

    if (dynamic_cast<Image *>(p_BaseData))
    {
      elementToUpdate = new ImageHistogramCacheElement();
    }
    else
    {
      MITK_WARN << "not supported: " << p_BaseData->GetNameOfClass();
      return nullptr;
    }

    elementToUpdate->baseData = p_BaseData;
    cache.push_front(elementToUpdate);
    TrimCache();

  recomputeElement:

    // MITK_INFO << "computing a new histogram";