package gnu.crypto.sasl.srp;

// ----------------------------------------------------------------------------
// Id: $
//
// Copyright (C) 2003 Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
//
// GNU Crypto 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, or (at your option)
// any later version.
//
// GNU Crypto 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; see the file COPYING.  If not, write to the
//
//    Free Software Foundation Inc.,
//    51 Franklin Street, Fifth Floor,
//    Boston, MA 02110-1301
//    USA
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library.  Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give
// you permission to link this library with independent modules to
// produce an executable, regardless of the license terms of these
// independent modules, and to copy and distribute the resulting
// executable under terms of your choice, provided that you also meet,
// for each linked independent module, the terms and conditions of the
// license of that module.  An independent module is a module which is
// not derived from or based on this library.  If you modify this
// library, you may extend this exception to your version of the
// library, but you are not obligated to do so.  If you do not wish to
// do so, delete this exception statement from your version.
// ----------------------------------------------------------------------------

/**
 * <p>A simple timing-related object for use by SRP re-use code.</p>
 *
 * @version Revision: $
 */
class StoreEntry {

   // Constants and variables
   // -------------------------------------------------------------------------

   private boolean perenial;
   private long timeToDie;

   // Constructor(s)
   // -------------------------------------------------------------------------

   StoreEntry(int ttl) {
      super();

      if (ttl == 0) {
         perenial = true;
         timeToDie = 0L;
      } else {
         perenial = false;
         timeToDie = System.currentTimeMillis() + (ttl & 0xFFFFFFFFL) * 1000L;
      }
   }

   // Class methods
   // -------------------------------------------------------------------------

   // Instance methods
   // -------------------------------------------------------------------------

   /**
    * <p>Returns <code>true</code> if the Time-To_live period has not elapsed.</p>
    *
    * @return <code>true</code> if the Time-To-Live period (in seconds) has not
    * elapsed yet; <code>false</code> otherwise.
    */
   boolean isAlive() {
      return (perenial ? true : (System.currentTimeMillis() < timeToDie));
   }
}