abstract class AnnotationDriver

abstract class AnnotationDriver implements MappingDriver {

  /**
   * The AnnotationReader.
   *
   * @var AnnotationReader
   */
  protected $reader;

  /**
   * The paths where to look for mapping files.
   *
   * @var array
   */
  protected $paths = array();

  /**
   * The file extension of mapping documents.
   *
   * @var string
   */
  protected $fileExtension = '.php';

  /**
   * Cache for AnnotationDriver#getAllClassNames()
   *
   * @var array
   */
  protected $classNames;

  /**
   * Name of the entity annotations as keys
   *
   * @var array
   */
  protected $entityAnnotationClasses = array();

  /**
   * Initializes a new AnnotationDriver that uses the given AnnotationReader for reading
   * docblock annotations.
   *
   * @param AnnotationReader $reader The AnnotationReader to use, duck-typed.
   * @param string|array $paths One or multiple paths where mapping classes can be found.
   */
  public function __construct($reader, $paths = null) {
    $this->reader = $reader;
    if ($paths) {
      $this
        ->addPaths((array) $paths);
    }
  }

  /**
   * Append lookup paths to metadata driver.
   *
   * @param array $paths
   */
  public function addPaths(array $paths) {
    $this->paths = array_unique(array_merge($this->paths, $paths));
  }

  /**
   * Retrieve the defined metadata lookup paths.
   *
   * @return array
   */
  public function getPaths() {
    return $this->paths;
  }

  /**
   * Retrieve the current annotation reader
   *
   * @return AnnotationReader
   */
  public function getReader() {
    return $this->reader;
  }

  /**
   * Get the file extension used to look for mapping files under
   *
   * @return string
   */
  public function getFileExtension() {
    return $this->fileExtension;
  }

  /**
   * Set the file extension used to look for mapping files under
   *
   * @param string $fileExtension The file extension to set
   * @return void
   */
  public function setFileExtension($fileExtension) {
    $this->fileExtension = $fileExtension;
  }

  /**
   * Whether the class with the specified name is transient. Only non-transient
   * classes, that is entities and mapped superclasses, should have their metadata loaded.
   *
   * A class is non-transient if it is annotated with an annotation
   * from the {@see AnnotationDriver::entityAnnotationClasses}.
   *
   * @param string $className
   * @return boolean
   */
  public function isTransient($className) {
    $classAnnotations = $this->reader
      ->getClassAnnotations(new \ReflectionClass($className));
    foreach ($classAnnotations as $annot) {
      if (isset($this->entityAnnotationClasses[get_class($annot)])) {
        return false;
      }
    }
    return true;
  }

  /**
   * {@inheritDoc}
   */
  public function getAllClassNames() {
    if ($this->classNames !== null) {
      return $this->classNames;
    }
    if (!$this->paths) {
      throw MappingException::pathRequired();
    }
    $classes = array();
    $includedFiles = array();
    foreach ($this->paths as $path) {
      if (!is_dir($path)) {
        throw MappingException::fileMappingDriversRequireConfiguredDirectoryPath($path);
      }
      $iterator = new \RegexIterator(new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \FilesystemIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY), '/^.+' . str_replace('.', '\\.', $this->fileExtension) . '$/i', \RecursiveRegexIterator::GET_MATCH);
      foreach ($iterator as $file) {
        $sourceFile = realpath($file[0]);
        require_once $sourceFile;
        $includedFiles[] = $sourceFile;
      }
    }
    $declared = get_declared_classes();
    foreach ($declared as $className) {
      $rc = new \ReflectionClass($className);
      $sourceFile = $rc
        ->getFileName();
      if (in_array($sourceFile, $includedFiles) && !$this
        ->isTransient($className)) {
        $classes[] = $className;
      }
    }
    $this->classNames = $classes;
    return $classes;
  }

}