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annotate flys-client/src/main/java/de/intevation/flys/client/shared/FieldVerifier.java @ 4354:e0add97c432b

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Circumvent NPE in Curve. issue flys/1019
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 02 Nov 2012 11:02:15 +0100
parents ba1b27b7d282
children
rev   line source
0
4e8be5e7855f Start of a GWT based client for FLYS-3.0
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 package de.intevation.flys.client.shared;
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2
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3 /**
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4 * <p>
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5 * FieldVerifier validates that the name the user enters is valid.
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6 * </p>
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7 * <p>
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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8 * This class is in the <code>shared</code> package because we use it in both
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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9 * the client code and on the server. On the client, we verify that the name is
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10 * valid before sending an RPC request so the user doesn't have to wait for a
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11 * network round trip to get feedback. On the server, we verify that the name is
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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12 * correct to ensure that the input is correct regardless of where the RPC
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13 * originates.
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14 * </p>
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15 * <p>
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16 * When creating a class that is used on both the client and the server, be sure
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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17 * that all code is translatable and does not use native JavaScript. Code that
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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18 * is note translatable (such as code that interacts with a database or the file
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19 * system) cannot be compiled into client side JavaScript. Code that uses native
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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20 * JavaScript (such as Widgets) cannot be run on the server.
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21 * </p>
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22 */
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23 public class FieldVerifier {
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24
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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25 /**
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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26 * Verifies that the specified name is valid for our service.
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ba1b27b7d282 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 0
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27 *
0
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28 * In this example, we only require that the name is at least four
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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29 * characters. In your application, you can use more complex checks to ensure
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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30 * that usernames, passwords, email addresses, URLs, and other fields have the
4e8be5e7855f Start of a GWT based client for FLYS-3.0
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31 * proper syntax.
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ba1b27b7d282 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 0
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32 *
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33 * @param name the name to validate
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34 * @return true if valid, false if invalid
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35 */
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36 public static boolean isValidName(String name) {
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37 if (name == null) {
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38 return false;
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39 }
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40 return name.length() > 3;
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41 }
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42 }
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