Develop the Business Service Tier

@RunWith( SpringJUnit4ClassRunner.class )
@ContextConfiguration( locations = { "classpath:context.xml" } )
@TransactionConfiguration( defaultRollback = true )
@Transactional
public class EstateServiceImplTest {
	@Autowired
	private EstateService service;
	
	@Test
	public void testFindAll() {
		Assert.assertEquals(0L, service.findAll().size());
	}
}

@Service
@Transactional
public class EstateServiceImpl implements EstateService {

	@Autowired
	private EstateDao estateDao;
	
	@Autowired
	private EstateMapper estateMapper;
	
	@Override
	public List<EstateDto> findAll() {
		List<Estate> estates = estateDao.getAll();
		List<EstateDto> estateDtos = new ArrayList<EstateDto>();
		for(Estate estate : estates){
			estateDtos.add(estateMapper.mapEntityToDto(estate));
		}
		return estateDtos;
	}
}