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@NotBlank(message = "timesheet.cadastro.horainicio.obrigatorio")
@Temporal(TemporalType.TIME)
@Column(name = "INICIO", nullable = false)
private Date horaInicio;
And, in my test (groovy) I put null to "horaInicio" :
def "Salvar um timesheet sem hora inicio"() {
    given:"um timesheet sem data"
        def usuario = sessionFactory.getCurrentSession().get(Usuario.class,1L) as Usuario
        def dias = sessionFactory.getCurrentSession().get(Dias.class,1L) as Dias
        def timeSheet = criarTimeSheet(usuario,dias) as TimeSheet
        timeSheet.horaInicio = null
    when:"buscar na base"
        def timeSheetPersistido = timeSheetService.salvar(timeSheet)
    then:"retorna uma lista de timesheet"
        def erro = thrown(ConstraintViolationException)
        "timesheet.cadastro.horainicio.obrigatorio".equals(erro.getConstraintViolations().asList().get(0).getMessage())
but I have error:
Expected exception javax.validation.ConstraintViolationException, but got javax.validation.UnexpectedTypeException
    at org.spockframework.lang.SpecInternals.thrownImpl(SpecInternals.java:79)
    at br.com.infowhere.service.TimeSheetServiceIt.Salvar um timesheet sem hora inicio(TimeSheetServiceIt.groovy:80)
Caused by: javax.validation.UnexpectedTypeException: HV000030: No validator could be found for type: java.util.Date.
Anybody can help me ?
thanks
As also said in documentation, @NotBlank is for String type. There is no concept of java.util.Date being blank. It can be null or not null. 
  
Validate that the annotated string is not null or empty. The
  difference to NotEmpty is that trailing whitespaces are getting
  ignored.
If goal is to check is value not null, @NotNull should be used. According documentation:
  
The annotated element must not be null. Accepts any type.
                I put @NotNull but don't work :-(    @NotNull(message = "timesheet.cadastro.horainicio.obrigatorio")     @Temporal(TemporalType.TIME)     @Column(name = "INICIO", nullable = false)     private Date horaInicio;
– user812612
                May 15, 2013 at 10:27
                hi my friend, I'm sorry, It's work now ! I had another atribute that I hadn't changed ;-) thanks !!!
– user812612
                May 15, 2013 at 10:35
        
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