/example/src/main/java/example/shared/FieldVerifier.java

package example.shared;



/**

 * <p>

 * FieldVerifier validates that the name the user enters is valid.

 * </p>

 * <p>

 * This class is in the <code>shared</code> packing 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;

	}

}