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jfreechart example source code file (PeriodAxisLabelInfo.java)

This example jfreechart source code file (PeriodAxisLabelInfo.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

awt, class, dateformat, font, illegalargumentexception, illegalargumentexception, io, null, null, paint, paint, periodaxislabelinfo, periodaxislabelinfo, rectangleinsets, reflection, regulartimeperiod, stroke, text, util

The jfreechart PeriodAxisLabelInfo.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.]
 *
 * ------------------------
 * PeriodAxisLabelInfo.java
 * ------------------------
 * (C) Copyright 2004-2009, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 01-Jun-2004 : Version 1 (DG);
 * 23-Feb-2005 : Replaced Spacer with RectangleInsets (DG);
 * 01-Mar-2005 : Modified constructors to accept DateFormat (DG);
 * 20-May-2005 : Added default constants and null argument checks in the
 *               constructor (DG);
 * 02-Mar-2009 : Updated createInstance to use locale (DG);
 *
 */

package org.jfree.chart.axis;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.awt.Stroke;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

import org.jfree.data.time.RegularTimePeriod;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleInsets;

/**
 * A record that contains information for one "band" of date labels in
 * a {@link PeriodAxis}.
 */
public class PeriodAxisLabelInfo implements Cloneable, Serializable {

    // TODO: this class is mostly immutable, so implementing Cloneable isn't
    // really necessary.  But there is still a hole in that you can get the
    // dateFormat and modify it.  We could return a copy, but that would slow
    // things down. Needs resolving.

    /** For serialization. */
    private static final long serialVersionUID = 5710451740920277357L;

    /** The default insets. */
    public static final RectangleInsets DEFAULT_INSETS
            = new RectangleInsets(2, 2, 2, 2);

    /** The default font. */
    public static final Font DEFAULT_FONT
            = new Font("SansSerif", Font.PLAIN, 10);

    /** The default label paint. */
    public static final Paint DEFAULT_LABEL_PAINT = Color.black;

    /** The default divider stroke. */
    public static final Stroke DEFAULT_DIVIDER_STROKE = new BasicStroke(0.5f);

    /** The default divider paint. */
    public static final Paint DEFAULT_DIVIDER_PAINT = Color.gray;

    /** The subclass of {@link RegularTimePeriod} to use for this band. */
    private Class periodClass;

    /** Controls the gaps around the band. */
    private RectangleInsets padding;

    /** The date formatter. */
    private DateFormat dateFormat;

    /** The label font. */
    private Font labelFont;

    /** The label paint. */
    private transient Paint labelPaint;

    /** A flag that controls whether or not dividers are visible. */
    private boolean drawDividers;

    /** The stroke used to draw the dividers. */
    private transient Stroke dividerStroke;

    /** The paint used to draw the dividers. */
    private transient Paint dividerPaint;

    /**
     * Creates a new instance.
     *
     * @param periodClass  the subclass of {@link RegularTimePeriod} to use
     *                     (<code>null not permitted).
     * @param dateFormat  the date format (<code>null not permitted).
     */
    public PeriodAxisLabelInfo(Class periodClass, DateFormat dateFormat) {
        this(
            periodClass, dateFormat, DEFAULT_INSETS, DEFAULT_FONT,
            DEFAULT_LABEL_PAINT, true, DEFAULT_DIVIDER_STROKE,
            DEFAULT_DIVIDER_PAINT
        );
    }

    /**
     * Creates a new instance.
     *
     * @param periodClass  the subclass of {@link RegularTimePeriod} to use
     *                     (<code>null not permitted).
     * @param dateFormat  the date format (<code>null not permitted).
     * @param padding  controls the space around the band (<code>null
     *                 not permitted).
     * @param labelFont  the label font (<code>null not permitted).
     * @param labelPaint  the label paint (<code>null not permitted).
     * @param drawDividers  a flag that controls whether dividers are drawn.
     * @param dividerStroke  the stroke used to draw the dividers
     *                       (<code>null not permitted).
     * @param dividerPaint  the paint used to draw the dividers
     *                      (<code>null not permitted).
     */
    public PeriodAxisLabelInfo(Class periodClass, DateFormat dateFormat,
                               RectangleInsets padding,
                               Font labelFont, Paint labelPaint,
                               boolean drawDividers, Stroke dividerStroke,
                               Paint dividerPaint) {
        if (periodClass == null) {
            throw new IllegalArgumentException("Null 'periodClass' argument.");
        }
        if (dateFormat == null) {
            throw new IllegalArgumentException("Null 'dateFormat' argument.");
        }
        if (padding == null) {
            throw new IllegalArgumentException("Null 'padding' argument.");
        }
        if (labelFont == null) {
            throw new IllegalArgumentException("Null 'labelFont' argument.");
        }
        if (labelPaint == null) {
            throw new IllegalArgumentException("Null 'labelPaint' argument.");
        }
        if (dividerStroke == null) {
            throw new IllegalArgumentException(
                    "Null 'dividerStroke' argument.");
        }
        if (dividerPaint == null) {
            throw new IllegalArgumentException("Null 'dividerPaint' argument.");
        }
        this.periodClass = periodClass;
        this.dateFormat = dateFormat;
        this.padding = padding;
        this.labelFont = labelFont;
        this.labelPaint = labelPaint;
        this.drawDividers = drawDividers;
        this.dividerStroke = dividerStroke;
        this.dividerPaint = dividerPaint;
    }

    /**
     * Returns the subclass of {@link RegularTimePeriod} that should be used
     * to generate the date labels.
     *
     * @return The class.
     */
    public Class getPeriodClass() {
        return this.periodClass;
    }

    /**
     * Returns the date formatter.
     *
     * @return The date formatter (never <code>null).
     */
    public DateFormat getDateFormat() {
        return this.dateFormat;
    }

    /**
     * Returns the padding for the band.
     *
     * @return The padding.
     */
    public RectangleInsets getPadding() {
        return this.padding;
    }

    /**
     * Returns the label font.
     *
     * @return The label font (never <code>null).
     */
    public Font getLabelFont() {
        return this.labelFont;
    }

    /**
     * Returns the label paint.
     *
     * @return The label paint.
     */
    public Paint getLabelPaint() {
        return this.labelPaint;
    }

    /**
     * Returns a flag that controls whether or not dividers are drawn.
     *
     * @return A flag.
     */
    public boolean getDrawDividers() {
        return this.drawDividers;
    }

    /**
     * Returns the stroke used to draw the dividers.
     *
     * @return The stroke.
     */
    public Stroke getDividerStroke() {
        return this.dividerStroke;
    }

    /**
     * Returns the paint used to draw the dividers.
     *
     * @return The paint.
     */
    public Paint getDividerPaint() {
        return this.dividerPaint;
    }

    /**
     * Creates a time period that includes the specified millisecond, assuming
     * the given time zone.
     *
     * @param millisecond  the time.
     * @param zone  the time zone.
     *
     * @return The time period.
     *
     * @deprecated As of 1.0.13, use the method that specifies the locale also.
     */
    public RegularTimePeriod createInstance(Date millisecond, TimeZone zone) {
        return createInstance(millisecond, zone, Locale.getDefault());
    }

    /**
     * Creates a time period that includes the specified millisecond, assuming
     * the given time zone.
     *
     * @param millisecond  the time.
     * @param zone  the time zone.
     * @param locale  the locale.
     *
     * @return The time period.
     *
     * @since 1.0.13.
     */
    public RegularTimePeriod createInstance(Date millisecond, TimeZone zone,
            Locale locale) {
        RegularTimePeriod result = null;
        try {
            Constructor c = this.periodClass.getDeclaredConstructor(
                    new Class[] {Date.class, TimeZone.class, Locale.class});
            result = (RegularTimePeriod) c.newInstance(new Object[] {
                    millisecond, zone, locale});
        }
        catch (Exception e) {
            // do nothing
        }
        return result;
    }

    /**
     * Tests this object for equality with an arbitrary object.
     *
     * @param obj  the object to test against (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof PeriodAxisLabelInfo) {
            PeriodAxisLabelInfo info = (PeriodAxisLabelInfo) obj;
            if (!info.periodClass.equals(this.periodClass)) {
                return false;
            }
            if (!info.dateFormat.equals(this.dateFormat)) {
                return false;
            }
            if (!info.padding.equals(this.padding)) {
                return false;
            }
            if (!info.labelFont.equals(this.labelFont)) {
                return false;
            }
            if (!info.labelPaint.equals(this.labelPaint)) {
                return false;
            }
            if (info.drawDividers != this.drawDividers) {
                return false;
            }
            if (!info.dividerStroke.equals(this.dividerStroke)) {
                return false;
            }
            if (!info.dividerPaint.equals(this.dividerPaint)) {
                return false;
            }
            return true;
        }
        return false;
    }

    /**
     * Returns a hash code for this object.
     *
     * @return A hash code.
     */
    public int hashCode() {
        int result = 41;
        result = 37 * this.periodClass.hashCode();
        result = 37 * this.dateFormat.hashCode();
        return result;
    }

    /**
     * Returns a clone of the object.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if cloning is not supported.
     */
    public Object clone() throws CloneNotSupportedException {
        PeriodAxisLabelInfo clone = (PeriodAxisLabelInfo) super.clone();
        return clone;
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.labelPaint, stream);
        SerialUtilities.writeStroke(this.dividerStroke, stream);
        SerialUtilities.writePaint(this.dividerPaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream)
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.labelPaint = SerialUtilities.readPaint(stream);
        this.dividerStroke = SerialUtilities.readStroke(stream);
        this.dividerPaint = SerialUtilities.readPaint(stream);
    }

}

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