Red Hat

It has just been a couple of weeks since the 6.0.0.Beta1 release but we needed a new version matching Bean Validation 2.0.0.Beta2.

Hibernate Validator 6 is going to be the reference implementation of Bean Validation 2.0 and, as such, we coordinate releases so you can test the latest additions as soon as possible.

Note that Hibernate Validator 6 requires JDK 8 or above.

What’s new since Beta1

Bean Validation 2.0.0.Beta2 support

The main goal of this version is to upgrade to Bean Validation 2.0.0.Beta2.

We fixed a couple of bugs and also introduced a few new features.

Support for non generic types in value extraction

Our value extraction framework (which is the basis of our new container element validation implementation) only supported generic types until now.

We alleviated this restriction by introducing a new type attribute to the ExtractedValue annotation allowing to define the type of the extracted value even in the absence of a type argument providing the information.

Thus, it is now possible to define value extractors as below:

@UnwrapByDefault
public class OptionalIntValueExtractor implements ValueExtractor<@ExtractedValue(type = Integer.class) OptionalInt> {

    @Override
    public void extractValues(OptionalInt originalValue, ValueReceiver receiver) {
        receiver.value( null, originalValue.isPresent() ? originalValue.getAsInt() : null );
    }
}

And that’s indeed what we do in Hibernate Validator to support OptionalInt, OptionalLong and OptionalDouble.

Addition of container element information via the node builder API

The node builder API allows you to define a property path for a constraint violation using the ConstraintValidatorContext.

It is now possible to define container element information for existing node types supporting them or to define container element nodes:

public static class Validator implements ConstraintValidator<MyConstraint, MyBean> {

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        context.disableDefaultConstraintViolation();

        context.buildConstraintViolationWithTemplate( context.getDefaultConstraintMessageTemplate() )
                .addContainerElementNode( "myNode1", Map.class, 1 )
                        .inIterable()
                        .atKey( "key" )
                .addConstraintViolation();

        context.buildConstraintViolationWithTemplate( context.getDefaultConstraintMessageTemplate() )
                .property( "myNode2" )
                        .inContainer( List.class, 0 )
                        .inIterable()
                        .atKey( "key" )
                .addConstraintViolation();

        return false;
    }
}

CDI improvements

Value extractors defined in the XML configuration are now managed beans.

We also fixed an issue that could occur if you were using a managed ParameterNameProvider.

And a few other things

  • @SafeHtml now supports defining accepted protocols (think allowing the data protocol for images) and has an improved programmatic API.

  • The @Min / @Max, @DecimalMin / @DecimalMax validators were split to have one validator per type and avoid reflection at runtime.

The complete list of fixed issues can be found in the release notes.

Getting 6.0.0.Beta2

To get the release with Maven, Gradle etc. use the GAV coordinates org.hibernate.validator:{hibernate-validator|hibernate-validator-cdi|hibernate-validator-annotation-processor}:6.0.0.Beta2. Note that the group id has changed from org.hibernate (Hibernate Validator 5 and earlier) to org.hibernate.validator (from Hibernate Validator 6 onwards).

Alternatively, a distribution bundle containing all the bits is provided on SourceForge (TAR.GZ, ZIP).

Feedback, issues, ideas?

To get in touch, use the usual channels:

What’s next?

Bean Validation 2.0 is currently in the Public Review phase, the Public Review Ballot will take place at the beginning of June. The Proposed Final Draft is planned to be released shortly thereafter, so if you spot any remaining issues or shortcomings in the spec draft, please let us know as soon as possible.

Hibernate Validator 6 is still under active development. We’ll keep you posted with our progress.

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