Java tutorial
/* * Copyright 2008 Jeff Dwyer * * 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.apress.progwt.server.web.domain.validation; import org.springframework.validation.Errors; import org.springframework.validation.ValidationUtils; import org.springframework.validation.Validator; import com.apress.progwt.server.web.domain.MailingListCommand; public class MailingListCommandValidator implements Validator { public boolean supports(Class clazz) { return clazz.equals(MailingListCommand.class); } /** * lookup messages from resource bundle */ public void validate(Object command, Errors errors) { ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email", "required"); } }