Newscoop\Entity\ArticleAuthor::setAuthor PHP Method

    public function setAuthor(Author $author = null)
    {
        $this->author = $author;
        return $this;
    }

 /**
  * Add author with type to article
  *
  * @param Article       $article
  * @param Author        $author
  * @param ArticleAuthor $authorType
  *
  * @return ArticleAuthor
  */
 public function addAuthorToArticle(Article $article, Author $author, AuthorType $authorType)
 {
     $articleAuthor = $this->em->getRepository('Newscoop\\Entity\\ArticleAuthor')->getArticleAuthor($article->getNumber(), $article->getLanguageCode(), $author->getId(), $authorType->getId())->getOneOrNullResult();
     if (!is_null($articleAuthor)) {
         throw new ResourcesConflictException("Author with this type is already attached to article", 409);
     }
     $articleAuthors = $this->em->getRepository('Newscoop\\Entity\\ArticleAuthor')->getArticleAuthors($article->getNumber(), $article->getLanguageCode())->getArrayResult();
     $articleAuthor = new ArticleAuthor();
     $articleAuthor->setArticle($article);
     $articleAuthor->setAuthor($author);
     $articleAuthor->setType($authorType);
     $articleAuthor->setOrder(count($articleAuthors) + 1);
     $this->em->persist($articleAuthor);
     $this->em->flush();
     return $articleAuthor;
 }