1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2013, 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
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  * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
25  * Other names may be trademarks of their respective owners.]
26  *
27  * -------------------------
28  * ChartChangeEventType.java
29  * -------------------------
30  * (C) Copyright 2005-2008, by Object Refinery Limited.
31  *
32  * Original Author:  David Gilbert (for Object Refinery Limited);
33  * Contributor(s):   -;
34  *
35  * Changes:
36  * --------
37  * 18-Feb-2005 : Version 1 (DG);
38  *
39  */
40 
41 package org.jfree.chart.event;
42 
43 import java.io.ObjectStreamException;
44 import java.io.Serializable;
45 
46 /**
47  * Defines tokens used to indicate an event type.
48  */
49 public final class ChartChangeEventType implements Serializable {
50 
51     /** For serialization. */
52     private static final long serialVersionUID = 5481917022435735602L;
53 
54     /** GENERAL. */
55     public static final ChartChangeEventType GENERAL
56             = new ChartChangeEventType("ChartChangeEventType.GENERAL");
57 
58     /** NEW_DATASET. */
59     public static final ChartChangeEventType NEW_DATASET
60             = new ChartChangeEventType("ChartChangeEventType.NEW_DATASET");
61 
62     /** DATASET_UPDATED. */
63     public static final ChartChangeEventType DATASET_UPDATED
64             = new ChartChangeEventType("ChartChangeEventType.DATASET_UPDATED");
65 
66     /** The name. */
67     private String name;
68 
69     /**
70      * Private constructor.
71      *
72      * @param name  the name.
73      */
ChartChangeEventType(String name)74     private ChartChangeEventType(String name) {
75         this.name = name;
76     }
77 
78     /**
79      * Returns a string representing the object.
80      *
81      * @return The string.
82      */
83     @Override
toString()84     public String toString() {
85         return this.name;
86     }
87 
88     /**
89      * Returns <code>true</code> if this object is equal to the specified
90      * object, and <code>false</code> otherwise.
91      *
92      * @param obj  the object (<code>null</code> permitted).
93      *
94      * @return A boolean.
95      */
96     @Override
equals(Object obj)97     public boolean equals(Object obj) {
98         if (this == obj) {
99             return true;
100         }
101         if (!(obj instanceof ChartChangeEventType)) {
102             return false;
103         }
104         ChartChangeEventType that = (ChartChangeEventType) obj;
105         if (!this.name.equals(that.toString())) {
106             return false;
107         }
108         return true;
109     }
110 
111     /**
112      * Returns a hash code value for the object.
113      *
114      * @return The hashcode
115      */
116     @Override
hashCode()117     public int hashCode() {
118         return this.name.hashCode();
119     }
120 
121     /**
122      * Ensures that serialization returns the unique instances.
123      *
124      * @return The object.
125      *
126      * @throws ObjectStreamException if there is a problem.
127      */
readResolve()128     private Object readResolve() throws ObjectStreamException {
129         if (this.equals(ChartChangeEventType.GENERAL)) {
130             return ChartChangeEventType.GENERAL;
131         }
132         else if (this.equals(ChartChangeEventType.NEW_DATASET)) {
133             return ChartChangeEventType.NEW_DATASET;
134         }
135         else if (this.equals(ChartChangeEventType.DATASET_UPDATED)) {
136             return ChartChangeEventType.DATASET_UPDATED;
137         }
138         return null;
139     }
140 
141 }
142