http://www.dropwizard.io/2.0.18/dropwizard-bom/dropwizard-dependencies/dropwizard-parent/dropwizard-validation: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.validation;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;


A validator for ValidationMethod-annotated methods. 
/**
 * A validator for {@link ValidationMethod}-annotated methods.
 */
public class MethodValidator implements ConstraintValidator<ValidationMethod, Boolean> {
    @Override
    public void initialize(ValidationMethod constraintAnnotation) {

    }

    @Override
    public boolean isValid(Boolean value, ConstraintValidatorContext context) {
        return (value == null) || value;
    }
}