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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* 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 elxComponentDatabase_h
#define elxComponentDatabase_h
#include "itkObject.h"
#include "itkObjectFactory.h"
#include <iostream>
#include <string>
#include <utility>
#include <map>
namespace elastix
{
/**
* \class ComponentDatabase
*
* \brief The ComponentDatabase class is a class that stores the
* New() functions of all components.
*
* In elastix the metric/transform/dimension/pixeltype etc. are all selected
* at runtime. To make this possible, all components (metric/transform etc)
* have to compiled for different dimension/pixeltype. The elx::ComponentDatabase
* stores for each instance and each pixeltype/dimension a pointers to a function
* that creates a component of the specific type.
*
* Each new component (a new metric for example should "make itself
* known" by calling the elxInstallMacro, which is defined in
* elxMacro.h .
*
* \sa elxInstallFunctions
* \ingroup Install
*/
class ComponentDatabase : public itk::Object
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ComponentDatabase);
/** Standard.*/
using Self = ComponentDatabase;
using Superclass = itk::Object;
using Pointer = itk::SmartPointer<Self>;
using ConstPointer = itk::SmartPointer<const Self>;
itkNewMacro(Self);
itkOverrideGetNameOfClassMacro(ComponentDatabase);
/** The Index is the number of the ElastixTypedef<number>::ElastixType.*/
using IndexType = unsigned int;
/** Typedefs for the CreatorMap*/
using ObjectPointer = itk::Object::Pointer;
/** PtrToCreator is a pointer to a function which
* outputs an ObjectPointer and has no input arguments.
*/
using PtrToCreator = ObjectPointer (*)();
using ComponentDescriptionType = std::string;
using CreatorMapKeyType = std::pair<ComponentDescriptionType, IndexType>;
using CreatorMapValueType = PtrToCreator;
using CreatorMapType = std::map<CreatorMapKeyType, CreatorMapValueType>;
using CreatorMapEntryType = CreatorMapType::value_type;
/** Typedefs for the IndexMap.*/
/** The ImageTypeDescription contains the pixeltype (as a string)
* and the dimension (unsigned int).
*/
using PixelTypeDescriptionType = std::string;
using ImageDimensionType = unsigned int;
using ImageTypeDescriptionType = std::pair<PixelTypeDescriptionType, ImageDimensionType>;
/** This pair contains the ImageTypeDescription of the FixedImageType
* and the MovingImageType.
*/
using IndexMapKeyType = std::pair<ImageTypeDescriptionType, ImageTypeDescriptionType>;
using IndexMapValueType = IndexType;
using IndexMapType = std::map<IndexMapKeyType, IndexMapValueType>;
using IndexMapEntryType = IndexMapType::value_type;
/** Functions to set an entry in a map.*/
int
SetCreator(const ComponentDescriptionType & name, IndexType i, PtrToCreator creator);
int
SetIndex(const PixelTypeDescriptionType & fixedPixelType,
ImageDimensionType fixedDimension,
const PixelTypeDescriptionType & movingPixelType,
ImageDimensionType movingDimension,
IndexType i);
/** Functions to get an entry in a map */
PtrToCreator
GetCreator(const ComponentDescriptionType & name, IndexType i) const;
IndexType
GetIndex(const PixelTypeDescriptionType & fixedPixelType,
ImageDimensionType fixedDimension,
const PixelTypeDescriptionType & movingPixelType,
ImageDimensionType movingDimension) const;
protected:
ComponentDatabase() = default;
~ComponentDatabase() override = default;
private:
CreatorMapType CreatorMap;
IndexMapType IndexMap;
};
} // end namespace elastix
#endif // end #ifndef elxComponentDatabase_h
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