001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2021, by Object Refinery Limited and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * ----------------------
028 * PolarAxisLocation.java
029 * ----------------------
030 * (C) Copyright 2009-2021, by Object Refinery Limited and Contributors.
031 *
032 * Original Author:  David Gilbert (for Object Refinery Limited);
033 * Contributor(s):   -;
034 */
035
036package org.jfree.chart.plot;
037
038import java.io.ObjectStreamException;
039import java.io.Serializable;
040
041/**
042 * Used to indicate the location of an axis on a {@link PolarPlot}.
043 */
044public final class PolarAxisLocation implements Serializable {
045
046    /** For serialization. */
047    private static final long serialVersionUID = -3276922179323563410L;
048
049    /** Axis left of north. */
050    public static final PolarAxisLocation NORTH_LEFT
051            = new PolarAxisLocation("PolarAxisLocation.NORTH_LEFT");
052
053    /** Axis right of north. */
054    public static final PolarAxisLocation NORTH_RIGHT
055            = new PolarAxisLocation("PolarAxisLocation.NORTH_RIGHT");
056
057    /** Axis left of south. */
058    public static final PolarAxisLocation SOUTH_LEFT
059            = new PolarAxisLocation("PolarAxisLocation.SOUTH_LEFT");
060
061    /** Axis right of south. */
062    public static final PolarAxisLocation SOUTH_RIGHT
063            = new PolarAxisLocation("PolarAxisLocation.SOUTH_RIGHT");
064
065    /** Axis above east. */
066    public static final PolarAxisLocation EAST_ABOVE
067            = new PolarAxisLocation("PolarAxisLocation.EAST_ABOVE");
068
069    /** Axis below east. */
070    public static final PolarAxisLocation EAST_BELOW
071            = new PolarAxisLocation("PolarAxisLocation.EAST_BELOW");
072
073    /** Axis above west. */
074    public static final PolarAxisLocation WEST_ABOVE
075            = new PolarAxisLocation("PolarAxisLocation.WEST_ABOVE");
076
077    /** Axis below west. */
078    public static final PolarAxisLocation WEST_BELOW
079            = new PolarAxisLocation("PolarAxisLocation.WEST_BELOW");
080
081    /** The name. */
082    private String name;
083
084    /**
085     * Private constructor.
086     *
087     * @param name  the name.
088     */
089    private PolarAxisLocation(String name) {
090        this.name = name;
091    }
092
093    /**
094     * Returns a string representing the object.
095     *
096     * @return The string.
097     */
098    @Override
099    public String toString() {
100        return this.name;
101    }
102
103    /**
104     * Returns {@code true} if this object is equal to the specified
105     * object, and {@code false} otherwise.
106     *
107     * @param obj  the other object ({@code null} permitted).
108     *
109     * @return A boolean.
110     */
111    @Override
112    public boolean equals(Object obj) {
113        if (obj == this) {
114            return true;
115        }
116        if (!(obj instanceof PolarAxisLocation)) {
117            return false;
118        }
119        PolarAxisLocation location = (PolarAxisLocation) obj;
120        if (!this.name.equals(location.toString())) {
121            return false;
122        }
123        return true;
124    }
125
126    /**
127     * Ensures that serialization returns the unique instances.
128     *
129     * @return The object.
130     *
131     * @throws ObjectStreamException if there is a problem.
132     */
133    private Object readResolve() throws ObjectStreamException {
134        if (this.equals(PolarAxisLocation.NORTH_RIGHT)) {
135            return PolarAxisLocation.NORTH_RIGHT;
136        }
137        else if (this.equals(PolarAxisLocation.NORTH_LEFT)) {
138            return PolarAxisLocation.NORTH_LEFT;
139        }
140        else if (this.equals(PolarAxisLocation.SOUTH_RIGHT)) {
141            return PolarAxisLocation.SOUTH_RIGHT;
142        }
143        else if (this.equals(PolarAxisLocation.SOUTH_LEFT)) {
144            return PolarAxisLocation.SOUTH_LEFT;
145        }
146        else if (this.equals(PolarAxisLocation.EAST_ABOVE)) {
147            return PolarAxisLocation.EAST_ABOVE;
148        }
149        else if (this.equals(PolarAxisLocation.EAST_BELOW)) {
150            return PolarAxisLocation.EAST_BELOW;
151        }
152        else if (this.equals(PolarAxisLocation.WEST_ABOVE)) {
153            return PolarAxisLocation.WEST_ABOVE;
154        }
155        else if (this.equals(PolarAxisLocation.WEST_BELOW)) {
156            return PolarAxisLocation.WEST_BELOW;
157        }
158        return null;
159    }
160
161}