Source Code Cross Referenced for DatasetChangeEvent.java in  » Chart » jfreechart » org » jfree » data » general » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.data.general 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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:         * DatasetChangeEvent.java
29:         * -----------------------
30:         * (C) Copyright 2000-2004, by Object Refinery Limited.
31:         *
32:         * Original Author:  David Gilbert (for Object Refinery Limited);
33:         * Contributor(s):   -;
34:         *
35:         * $Id: DatasetChangeEvent.java,v 1.3.2.1 2005/10/25 21:32:29 mungady Exp $
36:         *
37:         * Changes (from 24-Aug-2001)
38:         * --------------------------
39:         * 24-Aug-2001 : Added standard source header. Fixed DOS encoding problem (DG);
40:         * 15-Oct-2001 : Move to new package (com.jrefinery.data.*) (DG);
41:         * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
42:         * 11-Jun-2002 : Separated the event source from the dataset to cover the case 
43:         *               where the dataset is changed to null in the Plot class.  
44:         *               Updated Javadocs (DG);
45:         * 04-Oct-2002 : Fixed errors reported by Checkstyle (DG);
46:         * 05-Oct-2004 : Minor Javadoc updates (DG);
47:         *
48:         */
49:
50:        package org.jfree.data.general;
51:
52:        /**
53:         * A change event that encapsulates information about a change to a dataset.
54:         */
55:        public class DatasetChangeEvent extends java.util.EventObject {
56:
57:            /**
58:             * The dataset that generated the change event.
59:             */
60:            private Dataset dataset;
61:
62:            /**
63:             * Constructs a new event.  The source is either the dataset or the 
64:             * {@link org.jfree.chart.plot.Plot} class.  The dataset can be 
65:             * <code>null</code> (in this case the source will be the 
66:             * {@link org.jfree.chart.plot.Plot} class).
67:             *
68:             * @param source  the source of the event.
69:             * @param dataset  the dataset that generated the event (<code>null</code>
70:             *                 permitted).
71:             */
72:            public DatasetChangeEvent(Object source, Dataset dataset) {
73:                super (source);
74:                this .dataset = dataset;
75:            }
76:
77:            /**
78:             * Returns the dataset that generated the event.  Note that the dataset
79:             * may be <code>null</code> since adding a <code>null</code> dataset to a 
80:             * plot will generated a change event.
81:             *
82:             * @return The dataset (possibly <code>null</code>).
83:             */
84:            public Dataset getDataset() {
85:                return this.dataset;
86:            }
87:
88:        }
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