Using Java EE 6 Bean Validation

bean-validation, jakarta-ee, java, java-ee-6

Solution

Your use of the annotations is just fine. There's a validator implementation for each of those rest assured.

However, at some point you need to trigger the validation of this POJO. If it were an `@Entity` it would be your JPA provider which triggers validation, in your case you need to do it yourself.

There's a nice documentation for Hibernate Validator which is the reference implementation for JSR-303.

Example

public class Car {
    @NotNull
    @Valid
    private List<Person> passengers = new ArrayList<Person>();
}

Using `Car` and validating:

Car car = new Car( null, true );

ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<Car>> constraintViolations = validator.validate( car );

assertEquals( 1, constraintViolations.size() );
assertEquals( "may not be null", constraintViolations.iterator().next().getMessage() );

You may also want to read how bean validation is integrated with other frameworks (JPA, CDI, etc.).

Problem

I am trying to use Java EE 6 Validation as specified here http://docs.oracle.com/javaee/6/tutorial/doc/gircz.html I have annotated a simple field ``` @Max(11) @Min(3) private int numAllowed; ``` The docs says "For a built-in constraint, a default implementation is available" but how do I specify this. My constraints checks are not kicking in. I would expect it to work on calling of the setter method for the field. The only import in my class is ``` import javax.validation.constraints.Max; import javax.validation.constraints.Min; ``` How/where do I specify the implementation? I am putting the constraint on a filed in a simple POJO not an @Entity class, is this ok?

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