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jfreechart example source code file (DateTickUnitType.java)

This example jfreechart source code file (DateTickUnitType.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

datetickunittype, datetickunittype, day, hour, hour, io, minute, month, object, object, objectstreamexception, second, serializable, string, string, util

The jfreechart DateTickUnitType.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2009, 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.]
 *
 * ---------------------
 * DateTickUnitType.java
 * ---------------------
 * (C) Copyright 2009, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 09-Jan-2009 : Version 1 (DG);
 *
 */

package org.jfree.chart.axis;

import java.io.ObjectStreamException;
import java.io.Serializable;
import java.util.Calendar;

/**
 * An enumeration of the unit types for a {@link DateTickUnit} instance.
 *
 * @since 1.0.13
 */
public class DateTickUnitType implements Serializable {

    /** Year. */
    public static final DateTickUnitType YEAR
            = new DateTickUnitType("DateTickUnitType.YEAR", Calendar.YEAR);

    /** Month. */
    public static final DateTickUnitType MONTH
            = new DateTickUnitType("DateTickUnitType.MONTH", Calendar.MONTH);

    /** Day. */
    public static final DateTickUnitType DAY
            = new DateTickUnitType("DateTickUnitType.DAY", Calendar.DATE);


    /** Hour. */
    public static final DateTickUnitType HOUR
            = new DateTickUnitType("DateTickUnitType.HOUR",
                    Calendar.HOUR_OF_DAY);

    /** Minute. */
    public static final DateTickUnitType MINUTE
            = new DateTickUnitType("DateTickUnitType.MINUTE", Calendar.MINUTE);

    /** Second. */
    public static final DateTickUnitType SECOND
            = new DateTickUnitType("DateTickUnitType.SECOND", Calendar.SECOND);

    /** Millisecond. */
    public static final DateTickUnitType MILLISECOND
            = new DateTickUnitType("DateTickUnitType.MILLISECOND",
                    Calendar.MILLISECOND);

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

    /** The corresponding field value in Java's Calendar class. */
    private int calendarField;

    /**
     * Private constructor.
     *
     * @param name  the name.
     * @param calendarField  the calendar field.
     */
    private DateTickUnitType(String name, int calendarField) {
        this.name = name;
        this.calendarField = calendarField;
    }

    /**
     * Returns the calendar field.
     *
     * @return The calendar field.
     */
    public int getCalendarField() {
        return this.calendarField;
    }

    /**
     * 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 DateTickUnitType)) {
            return false;
        }
        DateTickUnitType t = (DateTickUnitType) obj;
        if (!this.name.equals(t.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(DateTickUnitType.YEAR)) {
            return DateTickUnitType.YEAR;
        }
        else if (this.equals(DateTickUnitType.MONTH)) {
            return DateTickUnitType.MONTH;
        }
        else if (this.equals(DateTickUnitType.DAY)) {
            return DateTickUnitType.DAY;
        }
        else if (this.equals(DateTickUnitType.HOUR)) {
            return DateTickUnitType.HOUR;
        }
        else if (this.equals(DateTickUnitType.MINUTE)) {
            return DateTickUnitType.MINUTE;
        }
        else if (this.equals(DateTickUnitType.SECOND)) {
            return DateTickUnitType.SECOND;
        }
        else if (this.equals(DateTickUnitType.MILLISECOND)) {
            return DateTickUnitType.MILLISECOND;
        }
        return null;
    }

}

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