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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
// Test for interface class constructor override with
// implementation class constructor through object factory methods
#include "itkVersion.h"
#include "itkImage.h"
#include "itkTestingMacros.h"
#include <list>
// Define an interface class with no backend
template <typename TPixel, unsigned int VImageDimension = 2>
class TestImageInterfaceClass : public itk::Image<TPixel, VImageDimension>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(TestImageInterfaceClass);
/** Standard class type aliases. */
using Self = TestImageInterfaceClass;
using Superclass = itk::Image<TPixel, VImageDimension>;
using Pointer = itk::SmartPointer<Self>;
using ConstPointer = itk::SmartPointer<const Self>;
/** Method for creation through the object factory.*/
itkFactoryOnlyNewMacro(TestImageInterfaceClass);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(TestImageInterfaceClass);
// Methods from itkObject
~TestImageInterfaceClass() override = default;
TestImageInterfaceClass() = default;
};
// Define an implementation subclass
template <typename TPixel, unsigned int VImageDimension = 2>
class TestImageImplementationClass : public TestImageInterfaceClass<TPixel, VImageDimension>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(TestImageImplementationClass);
/** Standard class type aliases. */
using Self = TestImageImplementationClass;
using Superclass = TestImageImplementationClass<TPixel, VImageDimension>;
using Pointer = itk::SmartPointer<Self>;
using ConstPointer = itk::SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkFactorylessNewMacro(TestImageImplementationClass);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(TestImageImplementationClass);
// Methods from itkObject
~TestImageImplementationClass() override = default;
TestImageImplementationClass() = default;
};
// Define factory to register implementation override for interface
class TestFactory : public itk::ObjectFactoryBase
{
public:
ITK_DISALLOW_COPY_AND_MOVE(TestFactory);
using Self = TestFactory;
using Superclass = itk::ObjectFactoryBase;
using Pointer = itk::SmartPointer<Self>;
using ConstPointer = itk::SmartPointer<const Self>;
/** Class methods used to interface with the registered factories. */
const char *
GetITKSourceVersion() const override
{
return ITK_SOURCE_VERSION;
}
const char *
GetDescription() const override
{
return "A Test Factory";
}
/** Method for class instantiation. */
itkFactorylessNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(TestFactory);
/** Register one factory of this type */
static void
RegisterOneFactory()
{
auto factory = TestFactory::New();
itk::ObjectFactoryBase::RegisterFactory(factory);
}
private:
TestFactory()
{
this->RegisterOverride(typeid(TestImageInterfaceClass<short, 2>).name(),
typeid(TestImageImplementationClass<short, 2>).name(),
"Test image factory override",
true,
itk::CreateObjectFunction<TestImageImplementationClass<short, 2>>::New());
}
};
using myPointer = itk::Image<short, 2>::Pointer;
bool
TestNewImage(myPointer v, const char * expectedClassName)
{
std::cout << "v->GetNameOfClass(): " << v->GetNameOfClass();
std::cout << ", expectedClassName: " << expectedClassName << std::endl;
if (strcmp(v->GetNameOfClass(), expectedClassName) != 0)
{
std::cout << "Test Failed" << std::endl;
return false;
}
return true;
}
int
itkObjectFactoryOnlyNewTest(int, char *[])
{
// Verify that interface class cannot be instantiated
// if no implementation factory is registered
using PixelType = short;
const size_t Dimension = 2;
using TestImageInterfaceType = TestImageInterfaceClass<PixelType, Dimension>;
ITK_TRY_EXPECT_EXCEPTION(TestImageInterfaceType::New());
// Register implementation override
auto factory = TestFactory::New();
itk::ObjectFactoryBase::RegisterFactory(factory);
// Log all registered factories
std::list<itk::ObjectFactoryBase *> factories = itk::ObjectFactoryBase::GetRegisteredFactories();
std::cout << "----- Registered factories -----" << std::endl;
for (auto & oneFactory : factories)
{
std::cout << " Factory version: " << oneFactory->GetITKSourceVersion() << std::endl
<< " Factory description: " << oneFactory->GetDescription() << std::endl;
std::list<std::string> overrides = oneFactory->GetClassOverrideNames();
std::list<std::string> names = oneFactory->GetClassOverrideWithNames();
std::list<std::string> descriptions = oneFactory->GetClassOverrideDescriptions();
std::list<bool> enableflags = oneFactory->GetEnableFlags();
std::list<std::string>::const_iterator n = names.begin();
std::list<std::string>::const_iterator d = descriptions.begin();
std::list<bool>::const_iterator e = enableflags.begin();
for (std::list<std::string>::const_iterator o = overrides.begin(); o != overrides.end(); ++o, ++n, ++d, ++e)
{
std::cout << " Override " << *o << " with " << *n << std::endl
<< " described as \"" << *d << '"' << std::endl
<< " enabled " << *e << std::endl;
}
}
std::cout << "----- -----" << std::endl;
TestImageInterfaceType::Pointer v;
ITK_TRY_EXPECT_NO_EXCEPTION(v = TestImageInterfaceType::New());
factory->Print(std::cout);
if (!TestNewImage(v, "TestImageImplementationClass"))
{
return EXIT_FAILURE;
}
// disable interface class creation through the factory
factory->Disable(typeid(TestImageInterfaceType).name());
ITK_TRY_EXPECT_EXCEPTION(v = TestImageInterfaceType::New());
// re-enable interface class creation through the factory
using TestImageImplementationType = TestImageImplementationClass<PixelType, Dimension>;
factory->SetEnableFlag(true, typeid(TestImageInterfaceType).name(), typeid(TestImageImplementationType).name());
ITK_TRY_EXPECT_NO_EXCEPTION(v = TestImageInterfaceType::New());
if (!TestNewImage(v, "TestImageImplementationClass"))
{
return EXIT_FAILURE;
}
// remove factory and verify interface class cannot be created
itk::ObjectFactoryBase::UnRegisterFactory(factory);
ITK_TRY_EXPECT_EXCEPTION(v = TestImageInterfaceType::New());
return EXIT_SUCCESS;
}
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