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.Constraint;
import javax.validation.Payload;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;


A constraint that allows one to specify a port range, but still allow 0 as the port value to
indicate dynamically allocated ports.

/**
 * A constraint that allows one to specify a port range, but still allow 0 as the port value to
 * indicate dynamically allocated ports.
 *
 */
@Target({ METHOD, FIELD, ANNOTATION_TYPE, TYPE_USE })
@Retention(RUNTIME)
@Constraint(validatedBy = PortRangeValidator.class)
@Documented
public @interface PortRange {
    int min() default 1;

    int max() default 65535;

    String message() default "{org.hibernate.validator.constraints.Range.message}";

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

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