public List<Book> multiCriteriaSearch(BookMultiCriteriaForm searchCriterias) {
        CriteriaQuery<Book> bookCriteriaQuery = createMultiCriteriaSearchBooksCriteriaQuery(searchCriterias);

        return runCriteriaQuery(bookCriteriaQuery);
    }

    private CriteriaQuery<Book> createMultiCriteriaSearchBooksCriteriaQuery(BookMultiCriteriaForm searchCriterias) {
        CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();

        CriteriaQuery<Book> bookCriteriaQuery = criteriaBuilder.createQuery(Book.class);

        Root<Book> bookRoot = bookCriteriaQuery.from(Book.class);

        Join<Book, Category> joinCategory = bookRoot.join("categories");
        Join<Book, Author> joinAuthor = bookRoot.join("authors");

        List<Predicate> predicates = new ArrayList<Predicate>();

        if (searchCriterias.getISBN() != null && !searchCriterias.getISBN().isEmpty()) {
            predicates.add(
                    criteriaBuilder.like(bookRoot.<String>get("ISBN"), searchCriterias.getISBN()));
        }
        if (searchCriterias.getBookName() != null && !searchCriterias.getBookName().isEmpty()) {
            predicates.add(
                    criteriaBuilder.like(bookRoot.<String>get("name"), searchCriterias.getBookName()));
        }
        if (searchCriterias.getAuthorName() != null && !searchCriterias.getAuthorName().isEmpty()) {
            predicates.add(
                    criteriaBuilder.equal(joinAuthor.get("name"), searchCriterias.getAuthorName()));
        }
        if (searchCriterias.getCategoryName() != null && !searchCriterias.getCategoryName().isEmpty()) {
            predicates.add(
                    criteriaBuilder.equal(joinCategory.get("name"), searchCriterias.getCategoryName()));
        }

        bookCriteriaQuery.select(bookRoot)
                .where(predicates.toArray(new Predicate[]{}))
                .distinct(true);
        return bookCriteriaQuery;
    }
    private List<Book> runCriteriaQuery(CriteriaQuery<Book> bookCriteriaQuery) {

        TypedQuery<Book> query = em.createQuery(bookCriteriaQuery);

        List<Book> books = query.getResultList();

        System.out.println(query.unwrap(org.hibernate.Query.class).getQueryString());

        return books;
    }