Mercurial > dive4elements > river
diff gwt-client/src/main/java/org/dive4elements/river/client/shared/FieldVerifier.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Thu, 25 Apr 2013 15:23:37 +0200 |
parents | flys-client/src/main/java/org/dive4elements/river/client/shared/FieldVerifier.java@821a02bbfb4e |
children | 172338b1407f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gwt-client/src/main/java/org/dive4elements/river/client/shared/FieldVerifier.java Thu Apr 25 15:23:37 2013 +0200 @@ -0,0 +1,42 @@ +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; + } +}