Question

Well, I read several issues (here and other sites) about class level validation with hibernate, I created the annotation and validation class, but when validation returns false, I get an exception (when validation returns true its ok) that the class is not valid (obviously because validation returned false), my doubt is: it was not to return a validation message as well? why is returning an exception, the code:

ValidBlock.java

@Target({ElementType.TYPE, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = ValidBlockValidator.class)
public @interface ValidBlock {
    String message() default "{app.ValidBlock.message}";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}

ValidBlockValidator.java

public class ValidBlockValidator implements ConstraintValidator<ValidBlock, Block> {

   @Override
   public void initialize(ValidBlock aBlock) {}

   @Override
   public boolean isValid(Block value, ConstraintValidatorContext context) {
      return false;
    }
}

I made the test and i’m pretty sure i recieved the Block object, as when validation return true is fine i just return false to test.

Block.java

@ValidBlock
public class Block{
   ...
}

and the error:

Grave: javax.validation.ConstraintViolationException: Validation
failed for classes [com.labsys.model.Block] during persist time for
groups [javax.validation.groups.Default, ] List of constraint
violations:[
ConstraintViolationImpl{interpolatedMessage='{app.ValidBlock.message}’,
propertyPath=, rootBeanClass=class com.labsys.model.Block,
messageTemplate='{app.ValidBlock.message}’} ] at
org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:159)
at
org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:94)
at
org.hibernate.action.internal.EntityInsertAction.preInsert(EntityInsertAction.java:185)
at
org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:81)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362)
at
org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354)
at
org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:275)
at
org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326)
at
org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1214)
at
org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:981)

Grave: JSF1073: javax.faces.event.AbortProcessingException obtido
durante o processamento de INVOKE_APPLICATION 5:
UIComponent-ClientId=blockForm:j_idt14,
Message=javax.validation.ConstraintViolationException: Validation
failed for classes [com.labsys.model.Block] during persist time for
groups [javax.validation.groups.Default, ] List of constraint
violations:[
ConstraintViolationImpl{interpolatedMessage='{app.ValidBlock.message}’,
propertyPath=, rootBeanClass=class com.labsys.model.Block,
messageTemplate='{app.ValidBlock.message}’} ] Grave:
javax.validation.ConstraintViolationException: Validation failed for
classes [com.labsys.model.Block] during persist time for groups
[javax.validation.groups.Default, ] List of constraint violations:[
ConstraintViolationImpl{interpolatedMessage='{app.ValidBlock.message}’,
propertyPath=, rootBeanClass=class com.labsys.model.Block,
messageTemplate='{app.ValidBlock.message}’} ]

Answer 1

You need to create a ValidationMessages.properties file and make it available at the root of your classpath, in order for the validation framework to extrapolate your custom message.