Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/shared/FieldVerifier.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
172338b1407f GWT client: Added copyright header.
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.shared;
0
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10
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11 /**
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12 * <p>
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13 * FieldVerifier validates that the name the user enters is valid.
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14 * </p>
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15 * <p>
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16 * This class is in the <code>shared</code> package because we use it in both
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17 * the client code and on the server. On the client, we verify that the name is
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18 * valid before sending an RPC request so the user doesn't have to wait for a
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19 * network round trip to get feedback. On the server, we verify that the name is
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20 * correct to ensure that the input is correct regardless of where the RPC
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21 * originates.
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22 * </p>
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23 * <p>
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24 * When creating a class that is used on both the client and the server, be sure
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25 * that all code is translatable and does not use native JavaScript. Code that
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26 * is note translatable (such as code that interacts with a database or the file
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27 * system) cannot be compiled into client side JavaScript. Code that uses native
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28 * JavaScript (such as Widgets) cannot be run on the server.
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29 * </p>
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30 */
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31 public class FieldVerifier {
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32
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33 /**
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34 * Verifies that the specified name is valid for our service.
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35 *
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36 * In this example, we only require that the name is at least four
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37 * characters. In your application, you can use more complex checks to ensure
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38 * that usernames, passwords, email addresses, URLs, and other fields have the
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39 * proper syntax.
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40 *
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41 * @param name the name to validate
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42 * @return true if valid, false if invalid
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43 */
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44 public static boolean isValidName(String name) {
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45 if (name == null) {
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46 return false;
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47 }
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48 return name.length() > 3;
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49 }
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50 }
http://dive4elements.wald.intevation.org