/**
* {@inheritdoc}
*/
public function translate($locale = null)
{
$locale = $locale ?: $this->currentLocale;
if (null === $locale) {
throw new \RuntimeException('No locale has been set and current locale is undefined.');
}
if ($this->currentTranslation && $locale === $this->currentTranslation->getLocale()) {
return $this->currentTranslation;
}
if (!($translation = $this->translations->get($locale))) {
if (null === $this->fallbackLocale) {
throw new \RuntimeException('No fallback locale has been set.');
}
if (!($fallbackTranslation = $this->translations->get($this->getFallbackLocale()))) {
$className = $this->getTranslationClass();
/** @var TranslationInterface $translation */
$translation = new $className();
$translation->setLocale($locale);
$this->addTranslation($translation);
} else {
$translation = clone $fallbackTranslation;
}
}
$this->currentTranslation = $translation;
return $translation;
}
/**
* @param TranslationInterface $translation
*/
public function addTranslation(TranslationInterface $translation)
{
if (!$this->translations->containsKey($translation->getLocale())) {
$this->translations->set($translation->getLocale(), $translation);
$translation->setTranslatable($this);
}
}
