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Java > Open Source Codes > org > jfree > chart > axis > CategoryLabelWidthType


1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2005, 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  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ---------------------------
28  * CategoryLabelWidthType.java
29  * ---------------------------
30  * (C) Copyright 2004, 2005, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: CategoryLabelWidthType.java,v 1.4.2.1 2005/10/25 20:37:34 mungady Exp $
36  *
37  * Changes:
38  * --------
39  * 24-Mar-2004 : Version 1 (DG);
40  *
41  */
42
43 package org.jfree.chart.axis;
44
45 import java.io.ObjectStreamException JavaDoc;
46 import java.io.Serializable JavaDoc;
47
48 /**
49  * Represents the width types for a category label.
50  */
51 public final class CategoryLabelWidthType implements Serializable JavaDoc {
52
53     /** For serialization. */
54     private static final long serialVersionUID = -6976024792582949656L;
55     
56     /** Percentage of category. */
57     public static final CategoryLabelWidthType
58         CATEGORY = new CategoryLabelWidthType(
59             "CategoryLabelWidthType.CATEGORY"
60         );
61
62     /** Percentage of range. */
63     public static final CategoryLabelWidthType
64         RANGE = new CategoryLabelWidthType("CategoryLabelWidthType.RANGE");
65
66     /** The name. */
67     private String JavaDoc name;
68
69     /**
70      * Private constructor.
71      *
72      * @param name the name (<code>null</code> not permitted).
73      */
74     private CategoryLabelWidthType(String JavaDoc name) {
75         if (name == null) {
76             throw new IllegalArgumentException JavaDoc("Null 'name' argument.");
77         }
78         this.name = name;
79     }
80
81     /**
82      * Returns a string representing the object.
83      *
84      * @return The string (never </code>null</code>).
85      */
86     public String JavaDoc toString() {
87         return this.name;
88     }
89
90     /**
91      * Returns <code>true</code> if this object is equal to the specified
92      * object, and <code>false</code> otherwise.
93      *
94      * @param obj the other object.
95      *
96      * @return A boolean.
97      */
98     public boolean equals(Object JavaDoc obj) {
99
100         if (this == obj) {
101             return true;
102         }
103         if (!(obj instanceof CategoryLabelWidthType)) {
104             return false;
105         }
106         CategoryLabelWidthType t = (CategoryLabelWidthType) obj;
107         if (!this.name.equals(t.toString())) {
108             return false;
109         }
110         return true;
111
112     }
113     
114     /**
115      * Ensures that serialization returns the unique instances.
116      *
117      * @return The object.
118      *
119      * @throws ObjectStreamException if there is a problem.
120      */
121     private Object JavaDoc readResolve() throws ObjectStreamException JavaDoc {
122         if (this.equals(CategoryLabelWidthType.CATEGORY)) {
123             return CategoryLabelWidthType.CATEGORY;
124         }
125         else if (this.equals(CategoryLabelWidthType.RANGE)) {
126             return CategoryLabelWidthType.RANGE;
127         }
128         return null;
129     }
130
131 }
132
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