Module io.avaje.validation

Package io.avaje.validation.adapter

Annotation Interface ConstraintValidator

@Target(TYPE)
public @interface ConstraintValidator

Marks a type as a Constraint Validator to be registered automatically.

A custom adapter registered using this annotation must have a public constructor accepting a ValidationContext instance, and must directly implement the ValidationAdapter Interface.

Example:

invalid input: '{@code
 @ConstraintValidator(SomeAnnotation.class)
 public final class CustomAnnotationAdapter implements ValidationAdapter<Object> {

   private final Message message;

   public CustomAnnotationAdapter(ValidationContext ctx, Set<Class<?>> groups, Map<String, Object> attributes) {
     //create a message object for error interpolation
     message = ctx.message("{message.property}");

      //use the attributes to extract the annotation values

   }


 	 @Override
   public boolean validate(Object value, ValidationRequest req, String propertyName) {

     var isValid = ...custom validation based on the attributes;

     if (!isValid) {
       req.addViolation(message, propertyName);
       return false;
     }

     return true;
 }

 }</pre>'

Required Element Summary

Required Elements

Modifier and Type	Required Element	Description
Class<? extends Annotation>	value	The Annotation this validator targets

Element Details

value

Class<? extends Annotation> value

The Annotation this validator targets