01: /* ===========================================================
02: * JFreeChart : a free chart library for the Java(tm) platform
03: * ===========================================================
04: *
05: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
06: *
07: * Project Info: http://www.jfree.org/jfreechart/index.html
08: *
09: * This library is free software; you can redistribute it and/or modify it
10: * under the terms of the GNU Lesser General Public License as published by
11: * the Free Software Foundation; either version 2.1 of the License, or
12: * (at your option) any later version.
13: *
14: * This library is distributed in the hope that it will be useful, but
15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17: * License for more details.
18: *
19: * You should have received a copy of the GNU Lesser General Public
20: * License along with this library; if not, write to the Free Software
21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22: * USA.
23: *
24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25: * in the United States and other countries.]
26: *
27: * ----------
28: * Value.java
29: * ----------
30: * (C) Copyright 2002-2004, by Object Refinery Limited.
31: *
32: * Original Author: David Gilbert (for Object Refinery Limited);
33: * Contributor(s): -;
34: *
35: * $Id: Value.java,v 1.2.2.1 2005/10/25 21:29:13 mungady Exp $
36: *
37: * Changes:
38: * --------
39: * 28-Oct-2002 : Version 1 (DG);
40: * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.base (DG);
41: *
42: */
43:
44: package org.jfree.data;
45:
46: /**
47: * A general purpose interface for accessing a value.
48: */
49: public interface Value {
50:
51: /**
52: * Returns the value.
53: *
54: * @return The value (possibly <code>null</code>).
55: */
56: public Number getValue();
57:
58: }
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