org.apache.wicket.validation.INullAcceptingValidator Maven / Gradle / Ivy

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Wicket is a Java web application framework that takes simplicity, separation of concerns and ease of development to a whole new level. Wicket pages can be mocked up, previewed and later revised using standard WYSIWYG HTML design tools. Dynamic content processing and form handling is all handled in Java code using a first-class component model backed by POJO data beans that can easily be persisted using your favorite technology.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.wicket.validation;

import org.apache.wicket.markup.html.form.FormComponent;

/**
 * Marker interface for validators that will accept a null value. Without implementing
 * this interface Wicket will never pass null values to
 * {@link IValidator#validate(IValidatable)}.
 * 
 * Keep in mind that the {@link FormComponent} must have set the required property to
 * false, otherwise Wicket will not permit the validator to process the
 * null value.
 * 
 * @author Matej Knopp
 * @param 
 *            type of validatable
 * @since 1.2.6
 * @see IValidator
 * @see FormComponent#setRequired(boolean)
 */
public interface INullAcceptingValidator extends IValidator
{

}