01: /* ===========================================================
02: * JFreeChart : a free chart library for the Java(tm) platform
03: * ===========================================================
04: *
05: * (C) Copyright 2000-2006, 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: * Values.java
29: * -----------
30: * (C) Copyright 2001-2006, by Object Refinery Limited.
31: *
32: * Original Author: David Gilbert (for Object Refinery Limited);
33: * Contributor(s): -;
34: *
35: * $Id: Values.java,v 1.2.2.2 2006/07/26 12:15:52 mungady Exp $
36: *
37: * Changes:
38: * --------
39: * 08-Nov-2001 : Version 1 (DG);
40: * 23-Oct-2002 : Renamed getValueCount --> getItemCount (DG);#
41: * ------------- JFREECHART 1.0.0 ---------------------------------------------
42: * 02-May-2006 : Updated API docs (DG);
43: *
44: */
45:
46: package org.jfree.data;
47:
48: /**
49: * An interface through which (single-dimension) data values can be accessed.
50: */
51: public interface Values {
52:
53: /**
54: * Returns the number of items (values) in the collection.
55: *
56: * @return The item count (possibly zero).
57: */
58: public int getItemCount();
59:
60: /**
61: * Returns the value with the specified index.
62: *
63: * @param index the item index (in the range <code>0</code> to
64: * <code>getItemCount() - 1</code>).
65: *
66: * @return The value (possibly <code>null</code>).
67: *
68: * @throws IndexOutOfBoundsException if <code>index</code> is not in the
69: * specified range.
70: */
71: public Number getValue(int index);
72:
73: }
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