[RESOLVIDO] Hibernate Validator não funciona - FJ28 Vraptor

Olá caros colegas,

estou fazendo a apostila fj28 do VRaptor e me encontrei com um erro. Eu estou fazendo o exercicio de validaçao do atraves do hibernate. Eu fiz conforme a apostila todos os passos. minha classe Produto:

package br.com.caelum.goodbuy.modelo;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import org.hibernate.validator.Length;
import org.hibernate.validator.Min;
import org.hibernate.validator.NotNull;

@Entity
public class Produto {

	@Id
	@GeneratedValue
	private Long id;
	
	@NotNull
	@Length(min = 3)
	private String nome;
	
	@NotNull
	@Length(max = 40)
	private String descricao;
	
	@Min(0)
	private Double preco;

	
	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getNome() {
		return nome;
	}

	public void setNome(String nome) {
		this.nome = nome;
	}

	public String getDescricao() {
		return descricao;
	}

	public void setDescricao(String descricao) {
		this.descricao = descricao;
	}

	public Double getPreco() {
		return preco;
	}

	public void setPreco(Double preco) {
		this.preco = preco;
	}

}

Metodo adiciona do ProdutosController:

//adiciona utiliza o validator do Hibernate
	public void adiciona(final Produto produto) {
        validator.validate(produto);
        validator.onErrorUsePageOf(ProdutosController.class).formulario();
        dao.salva(produto);
        result.redirectTo(this).lista();
    }

meu erro foi esse:

Estado HTTP 500 - exception raised, check root cause for details: org.hibernate.validator.InvalidStateException: validation failed for: br.com.caelum.goodbuy.modelo.Produto
type Informe de Excepción

mensaje exception raised, check root cause for details: org.hibernate.validator.InvalidStateException: validation failed for: br.com.caelum.goodbuy.modelo.Produto

descripción El servidor encontró un error interno que hizo que no pudiera rellenar este requerimiento.

excepción

br.com.caelum.vraptor.InterceptionException: exception raised, check root cause for details: org.hibernate.validator.InvalidStateException: validation failed for: br.com.caelum.goodbuy.modelo.Produto
br.com.caelum.vraptor.interceptor.ExecuteMethodInterceptor.intercept(ExecuteMethodInterceptor.java:96)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.LazyInterceptorHandler.execute(LazyInterceptorHandler.java:61)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.FlashInterceptor.intercept(FlashInterceptor.java:83)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ExceptionHandlerInterceptor.intercept(ExceptionHandlerInterceptor.java:71)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.InstantiateInterceptor.intercept(InstantiateInterceptor.java:48)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.intercept(ParametersInstantiatorInterceptor.java:93)
br.com.caelum.vraptor.core.LazyInterceptorHandler.execute(LazyInterceptorHandler.java:59)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ResourceLookupInterceptor.intercept(ResourceLookupInterceptor.java:69)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.EnhancedRequestExecution.execute(EnhancedRequestExecution.java:44)
br.com.caelum.vraptor.VRaptor$1.insideRequest(VRaptor.java:91)
br.com.caelum.vraptor.ioc.spring.SpringProvider.provideForRequest(SpringProvider.java:58)
br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:88)
causa raíz

org.hibernate.validator.InvalidStateException: validation failed for: br.com.caelum.goodbuy.modelo.Produto
org.hibernate.validator.event.ValidateEventListener.validate(ValidateEventListener.java:148)
org.hibernate.validator.event.ValidateEventListener.onPreInsert(ValidateEventListener.java:172)
org.hibernate.action.EntityIdentityInsertAction.preInsert(EntityIdentityInsertAction.java:160)
org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:65)
org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320)
org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
br.com.caelum.goodbuy.dao.ProdutoDAO.salva(ProdutoDAO.java:23)
br.com.caelum.goodbuy.controller.ProdutosController.adiciona(ProdutosController.java:33)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
br.com.caelum.vraptor.interceptor.ExecuteMethodInterceptor.intercept(ExecuteMethodInterceptor.java:61)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.LazyInterceptorHandler.execute(LazyInterceptorHandler.java:61)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.FlashInterceptor.intercept(FlashInterceptor.java:83)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ExceptionHandlerInterceptor.intercept(ExceptionHandlerInterceptor.java:71)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.InstantiateInterceptor.intercept(InstantiateInterceptor.java:48)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.intercept(ParametersInstantiatorInterceptor.java:93)
br.com.caelum.vraptor.core.LazyInterceptorHandler.execute(LazyInterceptorHandler.java:59)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.interceptor.ResourceLookupInterceptor.intercept(ResourceLookupInterceptor.java:69)
br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:54)
br.com.caelum.vraptor.core.EnhancedRequestExecution.execute(EnhancedRequestExecution.java:44)
br.com.caelum.vraptor.VRaptor$1.insideRequest(VRaptor.java:91)
br.com.caelum.vraptor.ioc.spring.SpringProvider.provideForRequest(SpringProvider.java:58)
br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:88)
nota La traza completa de la causa de este error se encuentra en los archivos de diario de Apache Tomcat/6.0.36.

Apache Tomcat/6.0.36

abaixo eu posto a foto dos meus jars, antes dava erro por q nao tinha os jars do validator, eu antes coloquei todos que vi que faltavam atraves da pasta do Vraptor>Optional>hibernate e somente depois que li vi que era necessario somente um arquivo(hibernate-validator-X.X.X.jar ) mas acho que não tem problema nenhum colocar os outros, coloquei para evitar passar por isto novamente.

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