content: /*************************************************************************
  *                                                                        *
  *  This file is part of the 20n/act project.                             *
  *  20n/act enables DNA prediction for synthetic biology/bioengineering.  *
  *  Copyright (C) 2017 20n Labs, Inc.                                     *
  *                                                                        *
  *  Please direct all queries to act@20n.com.                             *
  *                                                                        *
  *  This program is free software: you can redistribute it and/or modify  *
  *  it under the terms of the GNU General Public License as published by  *
  *  the Free Software Foundation, either version 3 of the License, or     *
  *  (at your option) any later version.                                   *
  *                                                                        *
  *  This program is distributed in the hope that it will be useful,       *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *  GNU General Public License for more details.                          *
  *                                                                        *
  *  You should have received a copy of the GNU General Public License     *
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  *                                                                        *
  *************************************************************************/
  
  package act.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;
    }
  }
  