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Java > Open Source Codes > org > jfree > chart > renderer > AreaRendererEndType


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  * AreaRendererEndType.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: AreaRendererEndType.java,v 1.4.2.1 2005/10/25 20:53:40 mungady Exp $
36  *
37  * Changes:
38  * --------
39  * 29-April-2004 : Version 1 (DG);
40  *
41  */
42
43 package org.jfree.chart.renderer;
44
45 import java.io.ObjectStreamException JavaDoc;
46 import java.io.Serializable JavaDoc;
47
48 /**
49  * An enumeration of the 'end types' for an area renderer.
50  */
51 public final class AreaRendererEndType implements Serializable JavaDoc {
52
53     /** For serialization. */
54     private static final long serialVersionUID = -1774146392916359839L;
55     
56     /**
57      * The area tapers from the first or last value down to zero.
58      */
59     public static final AreaRendererEndType TAPER = new AreaRendererEndType(
60         "AreaRendererEndType.TAPER"
61     );
62
63     /**
64      * The area is truncated at the first or last value.
65      */
66     public static final AreaRendererEndType TRUNCATE = new AreaRendererEndType(
67         "AreaRendererEndType.TRUNCATE"
68     );
69     
70     /**
71      * The area is levelled at the first or last value.
72      */
73     public static final AreaRendererEndType LEVEL = new AreaRendererEndType(
74         "AreaRendererEndType.LEVEL"
75     );
76
77     /** The name. */
78     private String JavaDoc name;
79
80     /**
81      * Private constructor.
82      *
83      * @param name the name.
84      */
85     private AreaRendererEndType(String JavaDoc name) {
86         this.name = name;
87     }
88
89     /**
90      * Returns a string representing the object.
91      *
92      * @return The string.
93      */
94     public String JavaDoc toString() {
95         return this.name;
96     }
97
98     /**
99      * Returns <code>true</code> if this object is equal to the specified
100      * object, and <code>false</code> otherwise.
101      *
102      * @param o the other object.
103      *
104      * @return A boolean.
105      */
106     public boolean equals(Object JavaDoc o) {
107
108         if (this == o) {
109             return true;
110         }
111         if (!(o instanceof AreaRendererEndType)) {
112             return false;
113         }
114
115         AreaRendererEndType t = (AreaRendererEndType) o;
116         if (!this.name.equals(t.toString())) {
117             return false;
118         }
119
120         return true;
121
122     }
123     
124     /**
125      * Ensures that serialization returns the unique instances.
126      *
127      * @return The object.
128      *
129      * @throws ObjectStreamException if there is a problem.
130      */
131     private Object JavaDoc readResolve() throws ObjectStreamException JavaDoc {
132         Object JavaDoc result = null;
133         if (this.equals(AreaRendererEndType.LEVEL)) {
134             result = AreaRendererEndType.LEVEL;
135         }
136         else if (this.equals(AreaRendererEndType.TAPER)) {
137             result = AreaRendererEndType.TAPER;
138         }
139         else if (this.equals(AreaRendererEndType.TRUNCATE)) {
140             result = AreaRendererEndType.TRUNCATE;
141         }
142         return result;
143     }
144
145 }
146
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