File: itkObjectFactoryTest3.cxx

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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.
 *
 *=========================================================================*/

#include "itkVersion.h"

class FakeObject3 : public itk::Object
{
public:
  typedef FakeObject3                   Self;
  typedef itk::Object                   Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;

protected:
  FakeObject3() {}
  ~FakeObject3() {}
};

class TestFactory3 : public itk::ObjectFactoryBase
{
public:
  typedef TestFactory3                  Self;
  typedef itk::ObjectFactoryBase        Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;

  /** Class methods used to interface with the registered factories. */
  virtual const char* GetITKSourceVersion() const ITK_OVERRIDE { return ITK_SOURCE_VERSION; }
  virtual const char* GetDescription() const ITK_OVERRIDE { return m_Description.c_str(); }

  /** Method for class instantiation. */
  itkFactorylessNewMacro(Self);

  /** Run-time type information (and related methods). */
  itkTypeMacro(TestFactory3, itk::ObjectFactoryBase);

  /** Register one factory of this type  */
  static void RegisterOneFactory(void)
  {
    TestFactory3::Pointer factory = TestFactory3::New();
    itk::ObjectFactoryBase::RegisterFactory(factory);
  }

  /** Enable users to set a custom description for this instance. */
  itkSetStringMacro( Description );

private:
  ITK_DISALLOW_COPY_AND_ASSIGN(TestFactory3);

  TestFactory3()
    {
    this->RegisterOverride(typeid(FakeObject3).name(),
                           typeid(FakeObject3).name(),
                           "FakeObject3 factory override",
                           true,
                           itk::CreateObjectFunction<FakeObject3>::New());
    }
  std::string  m_Description;
};

typedef std::vector< std::string >  DescriptionListType;

int ListRegisteredFactories( const std::string & TestName, const DescriptionListType & expectedList )
{
  typedef std::list<itk::ObjectFactoryBase *> FactoryListType;

  FactoryListType factories = itk::ObjectFactoryBase::GetRegisteredFactories();

  std::cout << "----- Registered factories -----" << std::endl;

  FactoryListType::iterator registeredFactoryItr = factories.begin();

  if( expectedList.size() != factories.size() )
    {
    std::cerr << "In " << TestName << std::endl;
    std::cerr << "Size of expected factory list does not match size of registered factories list." << std::endl;
    return EXIT_FAILURE;
    }

  DescriptionListType::const_iterator expectedItr = expectedList.begin();

  while( registeredFactoryItr != factories.end() )
    {
    std::string description = (*registeredFactoryItr)->GetDescription();
    std::cout << "  Description: " << description << std::endl;

    if( description != *expectedItr )
      {
      std::cerr << "In " << TestName << std::endl;
      std::cerr << "Expected   " << *expectedItr << std::endl;
      std::cerr << "but Found  " << description << std::endl;
      return EXIT_FAILURE;
      }

    ++expectedItr;
    ++registeredFactoryItr;
    }

  return EXIT_SUCCESS;
}

int itkObjectFactoryTest3(int, char *[])
{
  TestFactory3::Pointer factory1 = TestFactory3::New();
  TestFactory3::Pointer factory2 = TestFactory3::New();
  TestFactory3::Pointer factory3 = TestFactory3::New();
  TestFactory3::Pointer factory4 = TestFactory3::New();
  TestFactory3::Pointer factory5 = TestFactory3::New();
  TestFactory3::Pointer factory6 = TestFactory3::New();
  TestFactory3::Pointer factory7 = TestFactory3::New();

  factory1->SetDescription( "factory1" );
  factory2->SetDescription( "factory2" );
  factory3->SetDescription( "factory3" );
  factory4->SetDescription( "factory4" );
  factory5->SetDescription( "factory5" );
  factory6->SetDescription( "factory6" );
  factory7->SetDescription( "factory7" );

  DescriptionListType descriptionList;

  itk::ObjectFactoryBase::UnRegisterAllFactories();

  itk::ObjectFactoryBase::RegisterFactory( factory1 );
  itk::ObjectFactoryBase::RegisterFactory( factory2 );
  itk::ObjectFactoryBase::RegisterFactory( factory3 );

  descriptionList.push_back("factory1");
  descriptionList.push_back("factory2");
  descriptionList.push_back("factory3");

  int result = ListRegisteredFactories("TryA", descriptionList );

  if( result == EXIT_FAILURE )
    {
    return EXIT_FAILURE;
    }


  itk::ObjectFactoryBase::UnRegisterAllFactories();
  descriptionList.clear();

  itk::ObjectFactoryBase::RegisterFactory( factory1 );
  itk::ObjectFactoryBase::RegisterFactory( factory2 );
  itk::ObjectFactoryBase::RegisterFactory( factory3 );
  itk::ObjectFactoryBase::RegisterFactory( factory4, itk::ObjectFactoryBase::INSERT_AT_FRONT );

  descriptionList.push_back("factory4");
  descriptionList.push_back("factory1");
  descriptionList.push_back("factory2");
  descriptionList.push_back("factory3");

  result = ListRegisteredFactories("TryB", descriptionList );

  if( result == EXIT_FAILURE )
    {
    return EXIT_FAILURE;
    }


  itk::ObjectFactoryBase::RegisterFactory( factory5, itk::ObjectFactoryBase::INSERT_AT_BACK );
  descriptionList.push_back("factory5");

  result = ListRegisteredFactories("TryC", descriptionList );

  if( result == EXIT_FAILURE )
    {
    return EXIT_FAILURE;
    }


  itk::ObjectFactoryBase::RegisterFactory( factory6, itk::ObjectFactoryBase::INSERT_AT_POSITION, 3 );
  descriptionList.clear();
  descriptionList.push_back("factory4");  // position 0
  descriptionList.push_back("factory1");  // position 1
  descriptionList.push_back("factory2");  // position 2
  descriptionList.push_back("factory6");  // position 3
  descriptionList.push_back("factory3");  // position 4
  descriptionList.push_back("factory5");  // position 5

  result = ListRegisteredFactories("TryD", descriptionList );

  if( result == EXIT_FAILURE )
    {
    return EXIT_FAILURE;
    }


  itk::ObjectFactoryBase::RegisterFactory( factory7, itk::ObjectFactoryBase::INSERT_AT_BACK );
  descriptionList.push_back("factory7");

  result = ListRegisteredFactories("TryE", descriptionList );

  if( result == EXIT_FAILURE )
    {
    return EXIT_FAILURE;
    }


  return EXIT_SUCCESS;
}