mitkVectorPropertySerializer.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 mitkVectorPropertySerializer_h
#define mitkVectorPropertySerializer_h

#include "mitkBasePropertySerializer.h"

#include "mitkVectorProperty.h"

#include <mitkLexicalCast.h>

namespace mitk
{
  template <typename DATATYPE>
  class MITKSCENESERIALIZATIONBASE_EXPORT VectorPropertySerializer : public BasePropertySerializer
  {
  public:
    // Expand manually most of mitkClassMacro:
    // mitkClassMacro(VectorProperty<DATATYPE>, mitk::BaseProperty);
    // This manual expansion is done to override explicitely
    // the GetNameOfClass methods
    typedef VectorProperty<DATATYPE> PropertyType;
    typedef VectorPropertySerializer<DATATYPE> Self;
    typedef BasePropertySerializer SuperClass;
    typedef itk::SmartPointer<Self> Pointer;
    typedef itk::SmartPointer<const Self> ConstPointer;
    std::vector<std::string> GetClassHierarchy() const override { return mitk::GetClassHierarchy<Self>(); }
    // This function must return different
    // strings in function of the template parameter!
    // Serialization depends on this feature.
    static const char *GetStaticNameOfClass()
    {
      // concatenate a prefix dependent on the template type and our own classname
      static std::string nameOfClass =
        std::string(VectorPropertyDataType<DATATYPE>::prefix()) + "VectorPropertySerializer";
      return nameOfClass.c_str();
    }

    const char *GetNameOfClass() const override { return this->GetStaticNameOfClass(); }
    itkFactorylessNewMacro(Self);
    itkCloneMacro(Self);

      TiXmlElement *Serialize() override
    {
      auto listElement = new TiXmlElement("Values");

      if (const PropertyType *prop = dynamic_cast<const PropertyType *>(m_Property.GetPointer()))
      {
        typename PropertyType::VectorType elements = prop->GetValue();
        unsigned int index(0);
        for (auto listEntry : elements)
        {
          std::stringstream indexS;
          indexS << index++;

          auto entryElement = new TiXmlElement("Value");
          entryElement->SetAttribute("idx", indexS.str());
          entryElement->SetAttribute("value", boost::lexical_cast<std::string>(listEntry));
          listElement->LinkEndChild(entryElement);
        }

        return listElement;
      }
      else
      {
        return nullptr;
      }
    }

    BaseProperty::Pointer Deserialize(TiXmlElement *listElement) override
    {
      typename PropertyType::VectorType datalist;

      if (listElement)
      {
        MITK_DEBUG << "Deserializing " << *listElement;

        unsigned int index(0);
        std::string valueString;
        DATATYPE value;
        for (TiXmlElement *valueElement = listElement->FirstChildElement("Value"); valueElement;
             valueElement = valueElement->NextSiblingElement("Value"))
        {
          if (valueElement->QueryValueAttribute("value", &valueString) != TIXML_SUCCESS)
          {
            MITK_ERROR << "Missing value attribute in <Values> list";
            return nullptr;
          }

          try
          {
            value = boost::lexical_cast<DATATYPE>(valueString);
          }
          catch (boost::bad_lexical_cast &e)
          {
            MITK_ERROR << "Could not parse '" << valueString << "' as number: " << e.what();
            return nullptr;
          }

          datalist.push_back(value);
          ++index;
        }

        typename PropertyType::Pointer property = PropertyType::New();
        property->SetValue(datalist);
        return property.GetPointer();
      }
      else
      {
        MITK_ERROR << "Missing <Values> tag.";
      }

      return nullptr;
    }
  };

  typedef VectorPropertySerializer<double> DoubleVectorPropertySerializer;
  typedef VectorPropertySerializer<int> IntVectorPropertySerializer;

} // namespace

#endif