import java.net.URL;

public class DirectorySizeChecker implements IDirectorySizeChecker {
  @Override
  public long checkSize(String directoryName) throws DirectoryAccessException {
    URL resource = getClass().getClassLoader().getResource(directoryName);

    if (resource == null) {
      throw new DirectoryAccessException("Directory does not exist");
    }

    return -1;
  }
}