Examples/IO/IOPlugin.cxx

/*=========================================================================
 *
 *  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 "itkImageFileReader.h"
#include "itkImageFileWriter.h"

int main( int argc, char *argv[] )
{
  if (argc < 3)
    {
    std::cout << "Usage: " << argv[0] << " FileName Output [FactoryPath]" << std::endl;
    return EXIT_FAILURE;
    }


  const char* envName = "ITK_AUTOLOAD_PATH";
  char* oldenv = getenv( envName );

  std::string myenv = std::string(envName)+"=";

  // if the FactoryPath  argument is not "" then add it to the env
  if( argc >= 4 )
    {
    if( oldenv )
      {
#if defined(_WIN32)
      myenv += std::string(oldenv) + ";";
#else
      myenv += std::string(oldenv) + ":";
#endif
      }
    myenv += std::string(argv[3]);
    putenv (const_cast<char *>(myenv.c_str()));

    itk::ObjectFactoryBase::ReHash();
    }

  std::cout << myenv << std::endl;

  // List all registered factories
  std::list<itk::ObjectFactoryBase *> factories =
    itk::ObjectFactoryBase::GetRegisteredFactories();
  const std::size_t numFactories = factories.size();

  std::cout << "----- Registered factories -----" << std::endl;
  std::cout << "Count: " << numFactories << std::endl;
  if (!factories.empty())
    {
    for (auto & factory : factories)
      {
      std::cout << "  Factory version: "
                << factory->GetITKSourceVersion() << std::endl
                << "  Factory description: "
                << factory->GetDescription() << std::endl
                << "  Library Path: " << factory->GetLibraryPath() << std::endl;

      std::list<std::string> overrides = factory->GetClassOverrideNames();
      std::list<std::string> names = factory->GetClassOverrideWithNames();
      std::list<std::string> descriptions = factory->GetClassOverrideDescriptions();
      std::list<bool> enableflags = factory->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;
    }
  else
    {
    std::cout << "Failed to load any factories" << std::endl;
    return EXIT_FAILURE;
    }

  int status = EXIT_SUCCESS;
  {
  using ImageNDType = itk::Image<unsigned char,2>;

  using ReaderType = itk::ImageFileReader<ImageNDType>;
  using WriterType = itk::ImageFileWriter<ImageNDType>;
  ReaderType::Pointer reader = ReaderType::New();
  WriterType::Pointer writer = WriterType::New();

  try
    {
    reader->SetFileName(argv[1]);

    writer->SetFileName(argv[2]);
    writer->SetInput(reader->GetOutput());
    writer->Update();
    reader->GetOutput()->Print(std::cout);
    }
  catch (itk::ExceptionObject &ex)
    {
    std::cout << "------------------ Caught unexpected exception!" << std::endl;
    std::cout << ex;
    status = EXIT_FAILURE;
    }

  try
    {
    reader->SetFileName("foo");
    reader->Update();
    }
  catch (itk::ExceptionObject &ex)
    {
    std::cout << "------------------ Caught expected exception!" << std::endl;
    std::cout << ex;
    }
  }

  // make sure all object, such as the ImageIO held by the ImageReader
  // are deleted before rehashing
  itk::ObjectFactoryBase::ReHash();

  // List all registered factories
  factories = itk::ObjectFactoryBase::GetRegisteredFactories();

  std::cout << "----- Registered factories -----" << std::endl;
  std::cout << "Count: " << factories.size() << std::endl;

  if (!factories.empty())
    {
    for (auto & factory : factories)
      {
      std::cout << "check " << (void *) factory << std::endl;
      std::cout << "  Factory version: "
                << factory->GetITKSourceVersion() << std::endl
                << "  Factory description: "
                << factory->GetDescription() << std::endl;

      std::list<std::string> overrides = factory->GetClassOverrideNames();
      std::cout << "ClassOverrideNames size: " << overrides.size() << std::endl;
      std::list<std::string> names = factory->GetClassOverrideWithNames();
      std::cout << "ClassOverrideWithNames size: " << names.size() << std::endl;
      std::list<std::string> descriptions = factory->GetClassOverrideDescriptions();
      std::cout << "ClassOverrideDescriptions size: " << descriptions.size() << std::endl;
      std::list<bool> enableflags = factory->GetEnableFlags();
      std::cout << "EnableFlags size: " << enableflags.size() << std::endl;
      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;
    }


  if( numFactories != factories.size() )
    {
    std::cout << "Number of factories after rehasing differ!" << std::endl;
    return EXIT_FAILURE;
    }

  return status;
}