/*
* Copyright 2002-2006,2009 The Apache Software Foundation.
*
* 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.opensymphony.xwork2.validator.validators;
import com.opensymphony.xwork2.validator.ValidationException;
/**
* <!-- START SNIPPET: javadoc -->
* RequiredFieldValidator checks if the specified field is not null.
* <!-- END SNIPPET: javadoc -->
* <p/>
*
*
* <!-- START SNIPPET: parameters -->
* <ul>
* <li>fieldName - field name if plain-validator syntax is used, not needed if field-validator syntax is used</li>
* </ul>
* <!-- END SNIPPET: parameters -->
*
*
* <pre>
* <!-- START SNIPPET: example -->
* <validators>
*
* <!-- Plain Validator Syntax -->
* <validator type="required">
* <param name="fieldName">username</param>
* <message>username must not be null</message>
* </validator>
*
*
* <!-- Field Validator Syntax -->
* <field name="username">
* <field-validator type="required">
* <message>username must not be null</message>
* </field-validator>
* </field>
*
* </validators>
* <!-- END SNIPPET: example -->
* </pre>
*
*
*
* @author rainerh
* @version $Revision$
*/
public class RequiredFieldValidator extends FieldValidatorSupport {
public void validate(Object object) throws ValidationException {
String fieldName = getFieldName();
Object value = this.getFieldValue(fieldName, object);
if (value == null) {
addFieldError(fieldName, object);
}
}
}