com.google.gwt.validation.client.constraints.NullValidator Maven / Gradle / Ivy
/*
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.validation.client.constraints;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.constraints.Null;
/**
* {@link Null} constraint validator implementation.
*/
public class NullValidator implements ConstraintValidator {
@Override
public final void initialize(Null constraintAnnotation) {
}
@Override
public final boolean isValid(Object value, ConstraintValidatorContext context) {
return value == null;
}
}