Java tutorial
/* * This file is distributed as part of the MariaDB Manager. It is free * software: you can redistribute it and/or modify it under the terms of the * GNU General Public License as published by the Free Software Foundation, * version 2. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., 51 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * Copyright 2012-2014 SkySQL Corporation Ab */ package com.skysql.manager.validators; import com.vaadin.data.Validator; import com.vaadin.ui.TextField; /** * The Class UserDifferentValidator. */ public class UserDifferentValidator implements Validator { private static final long serialVersionUID = 0x4C656F6E6172646FL; private TextField otherUser; /** * Instantiates a new user different validator. * * @param otherUser the other user */ public UserDifferentValidator(TextField otherUser) { super(); this.otherUser = otherUser; } /** * Checks if is valid. * * @param value the value * @return true, if is valid */ public boolean isValid(Object value) { if (value == null || !(value instanceof String)) { return false; } else { boolean equal = ((String) value).equals((String) otherUser.getValue()); return !equal; } } // Upon failure, the validate() method throws an exception /* (non-Javadoc) * @see com.vaadin.data.Validator#validate(java.lang.Object) */ public void validate(Object value) throws InvalidValueException { if (!isValid(value)) { throw new InvalidValueException("Database User and Replication User must be different."); } } }