import org.finj.FTPClient;

/**
 * Just a small demo class to show how to use <CODE>finj</CODE>'s 
 * in a really basic way.
 * 
 * @author Javier Iglesias -- jiglesias@users.sourceforge.net 
 * @version v1.0
 */
public class FTPSimpleDemo extends Object {

  /**
   * Constructs a new instance of <CODE>org.finj.FTPClient</CODE>, 
   * then tries to connect to the <CODE>server</CODE>, identifying  
   * the <CODE>user</CODE> with <CODE>password</CODE>, 
   * and finally prints to <CODE>System.out</CODE> the contents 
   * of the default directory (that MAY be EMPTY!).
   * 
   * @param server computer name or IP address to connect.
   * @param user   username to use when login.
   * @param passwd password to use when login.
   */
  public FTPSimpleDemo ( String server, 
			 String user, 
			 char[] password ) throws Exception {
    FTPClient client = new FTPClient();

    // connect to the server
    client.open(server);
    client.login(user, password);

    // get directory contents
    String[] names = client.getFileNames();
    System.out.println("Contents of directory '" + 
                       client.getWorkingDirectory() + 
                       "'");
    for ( int index = 0;
          index < names.length;
          index ++ ) {
      System.out.println("   NAME n°" + 
                         (index+1) + 
                         " -> " + 
                         names[index]);
    }

    // gracefully close connection
    client.close();
  }

  /**
   * Method that lauches the test. If no parameters are provided, it 
   * prints a "Usage" message.
   * 
   * @param args list of arguments provided on the command line.
   */
  public static void main ( String[] args ) throws Exception {
    if ( args.length < 3 ) {
      System.out.println("Usage : java FTPSimpleDemo <server> <user> <password>");
      return;
    }
    new FTPSimpleDemo(args[0], args[1], args[2].toCharArray());
  }
}