/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2005, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc.  * in the United States and other countries.] * * ------------------------- * ChartChangeEventType.java * ------------------------- * (C) Copyright 2005, by Object Refinery Limited. * * Original Author:  David Gilbert (for Object Refinery Limited); * Contributor(s):   -; * * $Id: ChartChangeEventType.java,v 1.2 2005/05/19 15:43:00 mungady Exp $ * * Changes: * -------- * 18-Feb-2005 : Version 1 (DG); *  */package org.jfree.chart.event;import java.io.ObjectStreamException;import java.io.Serializable;/** * Defines tokens used to indicate an event type. */public final class ChartChangeEventType implements Serializable {    /** For serialization. */    private static final long serialVersionUID = 5481917022435735602L;        /** GENERAL. */    public static final ChartChangeEventType GENERAL         = new ChartChangeEventType("ChartChangeEventType.GENERAL");    /** NEW_DATASET. */    public static final ChartChangeEventType NEW_DATASET         = new ChartChangeEventType("ChartChangeEventType.NEW_DATASET");    /** DATASET_UPDATED. */    public static final ChartChangeEventType DATASET_UPDATED        = new ChartChangeEventType("ChartChangeEventType.DATASET_UPDATED");    /** The name. */    private String name;    /**     * Private constructor.     *     * @param name  the name.     */    private ChartChangeEventType(String name) {        this.name = name;    }    /**     * Returns a string representing the object.     *     * @return The string.     */    public String toString() {        return this.name;    }    /**     * Returns <code>true</code> if this object is equal to the specified      * object, and <code>false</code> otherwise.     *     * @param obj  the object (<code>null</code> permitted).     *     * @return A boolean.     */    public boolean equals(Object obj) {        if (this == obj) {            return true;        }        if (!(obj instanceof ChartChangeEventType)) {            return false;        }        ChartChangeEventType that = (ChartChangeEventType) obj;        if (!this.name.equals(that.toString())) {            return false;        }        return true;    }        /**     * Returns a hash code value for the object.     *     * @return The hashcode     */    public int hashCode() {        return this.name.hashCode();    }    /**     * 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(ChartChangeEventType.GENERAL)) {            return ChartChangeEventType.GENERAL;        }        else if (this.equals(ChartChangeEventType.NEW_DATASET)) {            return ChartChangeEventType.NEW_DATASET;        }        else if (this.equals(ChartChangeEventType.DATASET_UPDATED)) {            return ChartChangeEventType.DATASET_UPDATED;        }        return null;    }    }