Mercurial > dive4elements > river
view gwt-client/src/main/java/org/dive4elements/river/client/shared/FieldVerifier.java @ 7298:5b2126d21c2e
Polish SQ Datacage and Facets
The starting point is now taken from the blackboard
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Fri, 11 Oct 2013 15:35:25 +0200 |
parents | ea9eef426962 |
children |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.client.shared; /** * <p> * FieldVerifier validates that the name the user enters is valid. * </p> * <p> * This class is in the <code>shared</code> package because we use it in both * the client code and on the server. On the client, we verify that the name is * valid before sending an RPC request so the user doesn't have to wait for a * network round trip to get feedback. On the server, we verify that the name is * correct to ensure that the input is correct regardless of where the RPC * originates. * </p> * <p> * When creating a class that is used on both the client and the server, be sure * that all code is translatable and does not use native JavaScript. Code that * is note translatable (such as code that interacts with a database or the file * system) cannot be compiled into client side JavaScript. Code that uses native * JavaScript (such as Widgets) cannot be run on the server. * </p> */ public class FieldVerifier { /** * Verifies that the specified name is valid for our service. * * In this example, we only require that the name is at least four * characters. In your application, you can use more complex checks to ensure * that usernames, passwords, email addresses, URLs, and other fields have the * proper syntax. * * @param name the name to validate * @return true if valid, false if invalid */ public static boolean isValidName(String name) { if (name == null) { return false; } return name.length() > 3; } }