javax.validation.NotBlank missing validator

Question

I have requirement that in common api module(multi module project) I can't use any kind of hibernate's validation annotations, so I did use one from javax.validation which is acceptable.

Problem starts when I want to validate my domain objects(I use vaadin) that contains NotBlank annotation. I get the following exception

javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.NotBlank' validating type 'java.lang.String'. Check configuration for 'name'

Validation is invoked by call

Validation.buildDefaultValidatorFactory().validateValue(beanType, propertyName, value)

Same code works perfectly with hibernate's NotBlank

Also @Size @NotNull from javax works fine.

Is it possible to provide NotBlank validator implementation to DefaultValidatorFactory?

Am I missing some dependency? (I have hibernate-validator already)

Does NotBlank from javax works the same as NotBlank from hibernate(I mean does it validate strings?)

How to solve this?

Eva

can you tell which version of hibernate-validator do you have ? – Ishmaelite

What type of object you are using on this annotation ? Integer ? String ? – Disaffirm

Its 5.3.6.final – Eva

Validated field looks like this @NotBlank @Size(min = 1, max = 250) private String name; – Eva

Okay, are you using the spring boot starter-web ? if not are you including this dependency ? <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> – Disaffirm

Yes, I use, that was the cause of the problem > some nested dependency that I wasn't aware of. – Eva

Answer 1

The problem is in the version you are using then. You need to update to 6.0.x series. With the current latest been 6.0.9. Note that the groupId is changed to org.hibernate.validator.

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.0.9.Final</version>
</dependency>

the javax.validation.constraints.NotBlankis part of Bean Validation 2.0 and validator for it is not present in 5.3 series.

Ishmaelite

In the parent module we have latest version of the hibernate-validator(properties). However in module I work with I also have vaadin dependency which have dependency to spring-boot-starter-web which have this older validator version. I thought I had the newest one. Glad that went quick! Thanks – Eva

Answer 2

Validation-api 2.0.1 contains javax.validation.constraints.NotBlank which is replacement for Hibernate's NotBlank. To use it you need dependency:

 <dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>2.0.1.Final</version>
 </dependency>

then in code

@NotBlank 
private String possibleBlankString;

Airborne

Answer 3

as baeldung.com say Per the JSR 380 specification, the validation-api dependency contains the standard validation APIs:

<dependency>
  <groupId>javax.validation</groupId>
   <artifactId>validation-api</artifactId>
<version>2.0.0.Final</version>

Hibernate Validator is the reference implementation of the validation API. To use it, we must add the following dependencies:

<dependency>
   <groupId>org.hibernate.validator</groupId>
   <artifactId>hibernate-validator</artifactId>
<version>6.0.2.Final</version>

<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator-annotation-processor</artifactId>
<version>6.0.2.Final</version></dependency>

Steeplechase

Answer 4

Add the following dependency to your pom.xml:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

If the changes don't take effect, then restart IntelliJ IDEA.

Macdonell