AbstractSeriesDataset


1   /* ======================================
2    * JFreeChart : a free Java chart library
3    * ======================================
4    *
5    * Project Info:  http://www.jfree.org/jfreechart/index.html
6    * Project Lead:  David Gilbert (david.gilbert@object-refinery.com);
7    *
8    * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
9    *
10   * This library is free software; you can redistribute it and/or modify it under the terms
11   * of the GNU Lesser General Public License as published by the Free Software Foundation;
12   * either version 2.1 of the License, or (at your option) any later version.
13   *
14   * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15   * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16   * See the GNU Lesser General Public License for more details.
17   *
18   * You should have received a copy of the GNU Lesser General Public License along with this
19   * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20   * Boston, MA 02111-1307, USA.
21   *
22   * --------------------------
23   * AbstractSeriesDataset.java
24   * --------------------------
25   * (C) Copyright 2001-2003, by Object Refinery Limited.
26   *
27   * Original Author:  David Gilbert (for Object Refinery Limited);
28   * Contributor(s):   -;
29   *
30   * $Id: AbstractSeriesDataset.java,v 1.3 2003/06/13 15:46:39 mungady Exp $
31   *
32   * Changes
33   * -------
34   * 17-Nov-2001 : Version 1 (DG);
35   * 28-Mar-2002 : Implemented SeriesChangeListener interface (DG);
36   * 04-Oct-2002 : Fixed errors reported by Checkstyle (DG);
37   * 04-Feb-2003 : Removed redundant methods (DG);
38   * 27-Mar-2003 : Implemented Serializable (DG);
39   *
40   */
41  
42  package org.jfree.data;
43  
44  import java.io.Serializable  ;
45  
46  /**
47   * An abstract implementation of the {@link SeriesDataset} interface, containing a
48   * mechanism for registering change listeners.
49   *
50   * @author David Gilbert
51   */
52  public abstract class AbstractSeriesDataset extends AbstractDataset
53                                              implements SeriesDataset,
54                                                         SeriesChangeListener,
55                                                         Serializable   {
56  
57      /**
58       * Creates a new dataset.
59       */
60      protected AbstractSeriesDataset() {
61          super();
62      }
63  
64      /**
65       * Returns the number of series in the dataset.
66       *
67       * @return the number of series in the dataset.
68       */
69      public abstract int getSeriesCount();
70  
71      /**
72       * Returns the name of a series.
73       *
74       * @param series  the series (zero-based index).
75       *
76       * @return the series name.
77       */
78      public abstract String   getSeriesName(int series);
79  
80      /**
81       * Called when a series belonging to the dataset changes.
82       *
83       * @param event  information about the change.
84       */
85      public void seriesChanged(SeriesChangeEvent event) {
86          fireDatasetChanged();
87      }
88  
89  }
90
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