[EXTVAL-70] dependency injection for jsr 303 constraint-validators

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.3, 2.0.3, 1.1.3
• Component/s: Bean Validation
• Assignee: Unassigned
• Reporter: Gerhard Petracek
• Created: 13/Nov/09 22:14
• Updated: 23/Mar/10 11:05
• Resolved: 13/Nov/09 22:24

Description

it should be possible to provide/override constraint-validators via bean(s) provided by a bean-management facility/dependency injection provider e.g. to allow to inject services into constraint-validators.

the minimal version of a bv-constraint is:

@Constraint(validatedBy =

{ CustomConstraintValidator.class }

)
@Target(

{ METHOD, FIELD, ANNOTATION_TYPE /*...*/}

)
@Retention(RUNTIME)
public @interface CustomConstraint
{
String message() default "default message";

Class<?>[] groups() default { };

Class<? extends Payload>[] payload() default { };
}

validatedBy is required as well. the mechanism should use the class name of the constraint-validator to get the bean name (in this case: the bean name is: customConstraintValidator)

if a bean with this name is available and it is a constraint validator, the found bean should be used instead of a plain instance of the found class.