adding constraints dynamically to hibernate validator in a spring mvc application

Question

I am using hibernate validator in my spring mvc app. With the following simple steps I am able to get the validation happen.

pom.xml changes to add hibernate validator.
Annotated the beans with some constraints.
Annotated the controller method parameter with @Valid.
Handled the MethodArgumentNotValidException

I don't want to add the constraints to the beans, instead want to add them to the beans dynamically. This dynamic addition need to happen during application startup and just once.

In the hibernate validator documentation, I see the following snippet.

constraintMapping.type( Car.class ).property( "manufacturer", FIELD ).constraint( new NotNullDef() )

My question is, how do I get a handle to this ConstraintMapping instance ? I see that Spring instantiates the hibernate validator through the LocalValidatorFactoryBean. thanks for your help.

Hardy · Accepted Answer · 2014-02-07 20:13:57Z

3

You get it from the HibernateValidatorConfiguration - http://docs.jboss.org/hibernate/validator/5.1/reference/en-US/html_single/#section-programmatic-api

HibernateValidatorConfiguration configuration = Validation
        .byProvider( HibernateValidator.class )
        .configure();

ConstraintMapping constraintMapping = configuration.createConstraintMapping();

constraintMapping
    .type( Car.class )
        .property( "manufacturer", FIELD )
            .constraint( new NotNullDef() )
        .property( "licensePlate", FIELD )
            .ignoreAnnotations()
            .constraint( new NotNullDef() )
            .constraint( new SizeDef().min( 2 ).max( 14 ) )
    .type( RentalCar.class )
        .property( "rentalStation", METHOD )
            .constraint( new NotNullDef() );

Validator validator = configuration.addMapping( constraintMapping )
        .buildValidatorFactory()
        .getValidator();

This mean, however, that you probably cannot use LocalValidatorFactoryBean, but you probably can just write your own.

answered Feb 7, 2014 at 20:13

Hardy

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3 Comments

user19937 Over a year ago

I tried to register the validator in code, like so : appCtx.getAutowireCapableBeanFactory().configureBean(validator,"validator");. But, it gave errors. Is it the right way to register the validator programiatically ? is there other way ? thank you.

user19937 Over a year ago

is it possible to assign this validator in the controller using the

@InitBinder     protected void initBinder(WebDataBinder binder) {        binder.setValidator(javax.validation.Validator instance);     }

But, binder is expecting the Spring validator ..

Hardy Over a year ago

tbh, I don't know. I would ask on the Spring forum.

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