1. /* ===========================================================

  2.  * JFreeChart : a free chart library for the Java(tm) platform

  3.  * ===========================================================

  4.  *

  5.  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.

  6.  *

  7.  * Project Info:  http://www.jfree.org/jfreechart/index.html

  8.  *

  9.  * This library is free software; you can redistribute it and/or modify it under the terms

  10.  * of the GNU Lesser General Public License as published by the Free Software Foundation;

  11.  * either version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

  14.  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  15.  * See the GNU Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public License along with this

  18.  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

  19.  * Boston, MA 02111-1307, USA.

  20.  *

  21.  * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

  22.  * in the United States and other countries.]

  23.  *

  24.  * ---------------

  25.  * KeyedValue.java

  26.  * ---------------

  27.  * (C) Copyright 2002-2005, by Object Refinery Limited.

  28.  *

  29.  * Original Author:  David Gilbert (for Object Refinery Limited);

  30.  * Contributor(s):   -;

  31.  *

  32.  * $Id: KeyedValue.java,v 1.2 2005/01/12 14:53:12 mungady Exp $

  33.  *

  34.  * Changes:

  35.  * --------

  36.  * 31-Oct-2002 : Version 1 (DG);

  37.  * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.base (DG);

  38.  *

  39.  */

  40. 

  41. package org.jfree.data;

  42. 

  43. /**

  44.  * A (key, value) pair.

  45.  *

  46.  * @see DefaultKeyedValue

  47.  */

  48. public interface KeyedValue extends Value {

  49. 

  50.     /**

  51.      * Returns the key associated with the value.  The key returned by this 

  52.      * method should be immutable.

  53.      *

  54.      * @return The key.

  55.      */

  56.     public Comparable getKey();

  57. 

  58. }