public class RequiredFieldValidator extends FieldValidatorSupport
 
           <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>
 
 currentValue, fieldName, typedefaultMessage, EMPTY_STRING, messageKey, stack, textProviderFactory| Constructor and Description | 
|---|
| RequiredFieldValidator() | 
| Modifier and Type | Method and Description | 
|---|---|
| void | validate(Object object)The validation implementation must guarantee that setValidatorContext will
 be called with a non-null ValidatorContext before validate is called. | 
getCurrentValue, getFieldName, getValidatorType, setFieldName, setValidatorTypeaddActionError, addFieldError, getDefaultMessage, getFieldValue, getMessage, getMessageKey, getMessageParameters, getValidatorContext, isShortCircuit, parse, setDefaultMessage, setMessageKey, setMessageParameters, setShortCircuit, setTextProviderFactory, setValidatorContext, setValueStackclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetDefaultMessage, getMessage, getMessageKey, getMessageParameters, getValidatorContext, setDefaultMessage, setMessageKey, setMessageParameters, setValidatorContext, setValueStackpublic void validate(Object object) throws ValidationException
Validatorobject - the object to be validated.ValidationException - is thrown if there is validation error(s).Copyright © 2000–2025 Apache Software Foundation. All rights reserved.