| gvSIG desktop 1

/*

 * $Id: IPValidator.java 5819 2006-06-14 07:29:09Z cesar $

 * Copyright (C) 2003 Elmar Grom

 *

 * File :               IPValidator.java

 * Description :        Sample implementation of a rule validator

 * Author's email :     elmar@grom.net

 * Author's Website :   http://www.izforge.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 2

 * of the License, or 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */

package   com.izforge.izpack.sample;

import    com.izforge.izpack.panels.*;

/*---------------------------------------------------------------------------*/

/**

 * This class represents a simple validator for IP addresses to demonstrate

 * the implementation of a rule validator that cooperates with the

 * <code>RuleInputField</code> used in the <code>UserInputPanel</code>

 *

 * @version  0.0.1 / 02/19/03

 * @author   Elmar Grom

 */

/*---------------------------------------------------------------------------*/

public class IPValidator implements Validator

{

 /*--------------------------------------------------------------------------*/

 /**

  * Validates the contend of a <code>RuleInputField</code>. The test is

  * intended for a rule input field composed of four sub-fields. The

  * combination of their individual content is assumed to represent an IP

  * address.

  *

  * @param     client   the client object using the services of this validator.

  *

  * @return    <code>true</code> if the validation passes, otherwise <code>false</code>.

  */

 /*--------------------------------------------------------------------------*/

  public boolean validate (ProcessingClient client)

  {

    // ----------------------------------------------------

    // verify that there are actually four sub-fields. A

    // different number would indicate that we are not

    // connected with the RuleInputField that we expect

    // ----------------------------------------------------

    if (client.getNumFields () != 4)

    {

      return (false);

    }

    // ----------------------------------------------------

    // test each field to make sure it actually contains

    // an integer and the value of the integer is beween

    // 0 and 255.

    // ----------------------------------------------------

    boolean isIP = true;

    for (int i = 0; i < 4; i++)

    {

      int value;

      try

      {

        value = Integer.parseInt (client.getFieldContents (i));

        if ((value < 0) || (value > 255))

        {

          isIP = false;

        }

      }

      catch (Throwable exception)

      {

        isIP = false;

      }

    }

    return (isIP);

  }

}

/*---------------------------------------------------------------------------*/