content: package com.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 not 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;
  	}
  }
  