Parent Constraint Bean Validation

contraint.jave

package org.hibernate.validator;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.validation.Constraint;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.Payload;
import javax.validation.Valid;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

import org.hibernate.validator.internal.constraintvalidators.bv.NotNullValidator;

/**
 * @author Emmanuel Bernard <emmanuel@hibernate.org>
 */
public class Person {
	@NotEmptyOnParent(property="nomDeFamille")
	@Valid
	Person pere;
	Person mere;
	String nomDeFamille;

	@Documented
	@Constraint(validatedBy = { NotEmptyOnParentValidator.class})
	@NotNull
	@Size
	@Target({ ElementType.FIELD } )
	@Retention(RetentionPolicy.RUNTIME)
	public @interface NotEmptyOnParent {
		String message() default "{org.hibernate.validator.constraints.EAN.message}";
		Class<?>[] groups() default { };
		Class<? extends Payload>[] payload() default { };
		String property();

	}
	
	class NotEmptyOnParentValidator implements ConstraintValidator<Person.NotEmptyOnParent,Person> {
		private Method propertyMethod;
		@Override
		public void initialize(NotEmptyOnParent constraintAnnotation) {
			try {
				propertyMethod = Person.class.getMethod( constraintAnnotation.property() );
			}
			catch (NoSuchMethodException e) {
				e.printStackTrace();
			}

		}

		@Override
		public boolean isValid(Person value, ConstraintValidatorContext context) {
			try {
				boolean b = propertyMethod.invoke( value ) == null;
				if ( b == false) {
					return true;
				}
				context.disableDefaultConstraintViolation();
				context.buildConstraintViolationWithTemplate( context.getDefaultConstraintMessageTemplate() )
						.addPropertyNode( propertyMethod.getName() )
						.addConstraintViolation();
						
				return false;
			}
			catch (IllegalAccessException e) {
				e.printStackTrace();
			}
			catch (InvocationTargetException e) {
				e.printStackTrace();
			}
		}
	}
}