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jfreechart example source code file (XYCoordinateType.java)

This example jfreechart source code file (XYCoordinateType.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

data, index, io, object, object, objectstreamexception, relative, relative, serializable, string, string, xycoordinatetype, xycoordinatetype

The jfreechart XYCoordinateType.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ---------------------
 * XYCoordinateType.java
 * ---------------------
 * (C) Copyright 2007, 2008 by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 02-Feb-2007 : Version 1 (DG);
 * 03-Sep-2008 : Moved from experimental to main (DG);
 *
 */

package org.jfree.chart.util;

import java.io.ObjectStreamException;
import java.io.Serializable;

/**
 * Represents several possible interpretations for an (x, y) coordinate.
 *
 * @since 1.0.11
 */
public final class XYCoordinateType implements Serializable {

    /** The (x, y) coordinates represent a point in the data space. */
    public static final XYCoordinateType DATA
            = new XYCoordinateType("XYCoordinateType.DATA");

    /**
     * The (x, y) coordinates represent a relative position in the data space.
     * In this case, the values should be in the range (0.0 to 1.0).
     */
    public static final XYCoordinateType RELATIVE
            = new XYCoordinateType("XYCoordinateType.RELATIVE");

    /**
     * The (x, y) coordinates represent indices in a dataset.
     * In this case, the values should be in the range (0.0 to 1.0).
     */
    public static final XYCoordinateType INDEX
            = new XYCoordinateType("XYCoordinateType.INDEX");

    /** The name. */
    private String name;

    /**
     * Private constructor.
     *
     * @param name  the name.
     */
    private XYCoordinateType(String name) {
        this.name = name;
    }

    /**
     * Returns a string representing the object.
     *
     * @return The string.
     */
    public String toString() {
        return this.name;
    }

    /**
     * Returns <code>true if this object is equal to the specified
     * object, and <code>false otherwise.
     *
     * @param obj  the other object.
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof XYCoordinateType)) {
            return false;
        }
        XYCoordinateType order = (XYCoordinateType) obj;
        if (!this.name.equals(order.toString())) {
            return false;
        }
        return true;
    }

    /**
     * Ensures that serialization returns the unique instances.
     *
     * @return The object.
     *
     * @throws ObjectStreamException if there is a problem.
     */
    private Object readResolve() throws ObjectStreamException {
        if (this.equals(XYCoordinateType.DATA)) {
            return XYCoordinateType.DATA;
        }
        else if (this.equals(XYCoordinateType.RELATIVE)) {
            return XYCoordinateType.RELATIVE;
        }
        else if (this.equals(XYCoordinateType.INDEX)) {
            return XYCoordinateType.INDEX;
        }
        return null;
    }

}

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