package gnu.crypto.keyring;  // -*- c-basic-offset: 3 -*-

// ---------------------------------------------------------------------------
// $Id: PrimitiveEntry.java,v 1.5 2005/10/06 04:24:16 rsdio Exp $
//
// 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.
//
// ---------------------------------------------------------------------------

import java.util.Date;

/**
 * A primitive entry is an entry that contains a single cryptographic entity.
 */
public abstract class PrimitiveEntry extends Entry {

   // Fields.
   // ------------------------------------------------------------------------

   /** The creation date. */
   protected Date creationDate;

   // Constructor.
   // ------------------------------------------------------------------------

   protected PrimitiveEntry(int type, Date creationDate, Properties properties) {
      super(type, properties);
      if (creationDate == null) {
         this.creationDate = new Date();
      } else {
         this.creationDate = (Date) creationDate.clone();
      }
      if (!this.properties.containsKey("alias") ||
          this.properties.get("alias").length() == 0) {
         throw new IllegalArgumentException("primitive entries MUST have an alias");
      }
      this.properties.put("creation-date", String.valueOf(creationDate.getTime()));
   }

   protected PrimitiveEntry(int type)
   {
      super (type);
   }

   // Instance method.
   // ------------------------------------------------------------------------

   /**
    * Returns the alias of this primitive entry.
    *
    * @return The alias.
    */
   public String getAlias() {
      return properties.get("alias");
   }

   /**
    * Returns the creation date of this primitive entry.
    *
    * @return The creation date.
    */
   public Date getCreationDate() {
      return (Date) creationDate.clone();
   }

   public boolean equals(Object object) {
      if (!getClass().equals(object.getClass()))
         return false;
      return getAlias().equals(((PrimitiveEntry) object).getAlias());
   }

   protected final void makeCreationDate() throws MalformedKeyringException {
      String s = properties.get("creation-date");
      if (s == null) {
         throw new MalformedKeyringException("no creation date");
      }
      try {
         creationDate = new Date(Long.parseLong(s));
      } catch (NumberFormatException nfe) {
         throw new MalformedKeyringException("invalid creation date");
      }
   }
}