class StaticTranslation

class StaticTranslation implements TranslatorInterface {

  /**
   * String translations
   *
   * @var array
   *   Array of cached translations indexed by language and context.
   */
  protected $translations;

  /**
   * Constructs a translator from an array of translations.
   *
   * @param array $translations
   *   Array of override strings indexed by language and context
   */
  public function __construct($translations = array()) {
    $this->translations = $translations;
  }

  /**
   * {@inheritdoc}
   */
  public function getStringTranslation($langcode, $string, $context) {
    if (!isset($this->translations[$langcode])) {
      $this->translations[$langcode] = $this
        ->loadLanguage($langcode);
    }
    if (isset($this->translations[$langcode][$context][$string])) {
      return $this->translations[$langcode][$context][$string];
    }
    else {
      return FALSE;
    }
  }

  /**
   * {@inheritdoc}
   */
  public function reset() {
    $this->translations = array();
  }

  /**
   * Add translations for new language.
   *
   * @param string $langcode
   *   The langcode of the language.
   */
  protected function loadLanguage($langcode) {

    // This class is usually a base class but we do not declare as abstract
    // because it can be used on its own, by passing a simple array on the
    // constructor. This can be useful while testing, but it does not support
    // loading specific languages. All available languages should be passed
    // in the constructor array.
    return array();
  }

}