java-arch-9.java

public class HibernateBookRepository implements BookRepository {

    private final HibernateCrudBookRepository crudBookRepository;
    private final JpaMapper jpaMapper;

    @Autowired
    public HibernateBookRepository(HibernateCrudBookRepository crudBookRepository, JpaMapper jpaMapper) {
        this.crudBookRepository = crudBookRepository;
        this.jpaMapper = jpaMapper;
    }

    @Override
    public BookId save(Book book) {
        BookJpaEntity bookJpaEntity = jpaMapper.map(book);
        crudBookRepository.save(bookJpaEntity);

        Book saved = jpaMapper.map(bookJpaEntity);

        // Set id
        book.setId(saved.id());
        return saved.id();
    }

    @Override
    public Book findById(BookId bookId) {
        BookJpaEntity jpaEntity = crudBookRepository.findOne(parseId(bookId));
        return jpaMapper.map(jpaEntity);
    }

    private long parseId(BookId bookId) {
        return Long.parseLong(bookId.idString());
    }

    @Override
    public List<Book> findAll() {
        Iterable<BookJpaEntity> allJpaEntities = crudBookRepository.findAll();

        List<Book> result = new ArrayList<>();
        for (BookJpaEntity jpaEntity : allJpaEntities) {
            Book book = jpaMapper.map(jpaEntity);
            result.add(book);
        }

        return result;
    }
    
    @Override
    public Book findByTitle(String title) {
        // Implementation ...
    }

    @Override
    public Book findByAuthor(String author) {
        // Implementation ...
    }
}