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jfreechart example source code file (IntervalXYItemLabelGenerator.java)

This example jfreechart source code file (IntervalXYItemLabelGenerator.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

clonenotsupportedexception, date, date, dateformat, dateformat, intervalxydataset, intervalxyitemlabelgenerator, intervalxyitemlabelgenerator, io, numberformat, numberformat, object, publiccloneable, serializable, string, text, util

The jfreechart IntervalXYItemLabelGenerator.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.]
 *
 * ---------------------------------
 * IntervalXYItemLabelGenerator.java
 * ---------------------------------
 * (C) Copyright 2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 26-May-2008 : Version 1 (DG);
 *
 */

package org.jfree.chart.labels;

import java.io.Serializable;
import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.NumberFormat;
import java.util.Date;

import org.jfree.data.xy.IntervalXYDataset;
import org.jfree.data.xy.XYDataset;
import org.jfree.util.PublicCloneable;

/**
 * An item label generator for datasets that implement the
 * {@link IntervalXYDataset} interface.
 *
 * @since 1.0.10
 */
public class IntervalXYItemLabelGenerator extends AbstractXYItemLabelGenerator
        implements XYItemLabelGenerator, Cloneable, PublicCloneable,
                   Serializable {

    /** The default item label format. */
    public static final String DEFAULT_ITEM_LABEL_FORMAT = "{5} - {6}";

    /**
     * Creates an item label generator using default number formatters.
     */
    public IntervalXYItemLabelGenerator() {
        this(DEFAULT_ITEM_LABEL_FORMAT, NumberFormat.getNumberInstance(),
            NumberFormat.getNumberInstance());
    }

    /**
     * Creates an item label generator using the specified number formatters.
     *
     * @param formatString  the item label format string (<code>null not
     *                      permitted).
     * @param xFormat  the format object for the x values (<code>null
     *                 not permitted).
     * @param yFormat  the format object for the y values (<code>null
     *                 not permitted).
     */
    public IntervalXYItemLabelGenerator(String formatString,
        NumberFormat xFormat, NumberFormat yFormat) {

        super(formatString, xFormat, yFormat);
    }

    /**
     * Creates an item label generator using the specified formatters.
     *
     * @param formatString  the item label format string (<code>null
     *                      not permitted).
     * @param xFormat  the format object for the x values (<code>null
     *                 not permitted).
     * @param yFormat  the format object for the y values (<code>null
     *                 not permitted).
     */
    public IntervalXYItemLabelGenerator(String formatString,
        DateFormat xFormat, NumberFormat yFormat) {

        super(formatString, xFormat, yFormat);
    }

    /**
     * Creates an item label generator using the specified formatters (a
     * number formatter for the x-values and a date formatter for the
     * y-values).
     *
     * @param formatString  the item label format string (<code>null
     *                      not permitted).
     * @param xFormat  the format object for the x values (<code>null
     *                 permitted).
     * @param yFormat  the format object for the y values (<code>null
     *                 not permitted).
     */
    public IntervalXYItemLabelGenerator(String formatString,
            NumberFormat xFormat, DateFormat yFormat) {

        super(formatString, xFormat, yFormat);
    }

    /**
     * Creates a label generator using the specified date formatters.
     *
     * @param formatString  the label format string (<code>null not
     *                      permitted).
     * @param xFormat  the format object for the x values (<code>null
     *                 not permitted).
     * @param yFormat  the format object for the y values (<code>null
     *                 not permitted).
     */
    public IntervalXYItemLabelGenerator(String formatString,
            DateFormat xFormat, DateFormat yFormat) {

        super(formatString, xFormat, yFormat);
    }

    /**
     * Creates the array of items that can be passed to the
     * {@link MessageFormat} class for creating labels.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return An array of seven items from the dataset formatted as
     *         <code>String objects (never null).
     */
    protected Object[] createItemArray(XYDataset dataset, int series,
                                       int item) {

        IntervalXYDataset intervalDataset = null;
        if (dataset instanceof IntervalXYDataset) {
            intervalDataset = (IntervalXYDataset) dataset;
        }
        Object[] result = new Object[7];
        result[0] = dataset.getSeriesKey(series).toString();

        double x = dataset.getXValue(series, item);
        double xs = x;
        double xe = x;
        double y = dataset.getYValue(series, item);
        double ys = y;
        double ye = y;
        if (intervalDataset != null) {
            xs = intervalDataset.getStartXValue(series, item);
            xe = intervalDataset.getEndXValue(series, item);
            ys = intervalDataset.getStartYValue(series, item);
            ye = intervalDataset.getEndYValue(series, item);
        }

        DateFormat xdf = getXDateFormat();
        if (xdf != null) {
            result[1] = xdf.format(new Date((long) x));
            result[2] = xdf.format(new Date((long) xs));
            result[3] = xdf.format(new Date((long) xe));
        }
        else {
            NumberFormat xnf = getXFormat();
            result[1] = xnf.format(x);
            result[2] = xnf.format(xs);
            result[3] = xnf.format(xe);
        }

        NumberFormat ynf = getYFormat();
        DateFormat ydf = getYDateFormat();
        if (Double.isNaN(y) && dataset.getY(series, item) == null) {
            result[4] = getNullYString();
        }
        else {
            if (ydf != null) {
                result[4] = ydf.format(new Date((long) y));
            }
            else {
                result[4] = ynf.format(y);
            }
        }
        if (Double.isNaN(ys)
                && intervalDataset.getStartY(series, item) == null) {
            result[5] = getNullYString();
        }
        else {
            if (ydf != null) {
                result[5] = ydf.format(new Date((long) ys));
            }
            else {
                result[5] = ynf.format(ys);
            }
        }
        if (Double.isNaN(ye)
                && intervalDataset.getEndY(series, item) == null) {
            result[6] = getNullYString();
        }
        else {
            if (ydf != null) {
                result[6] = ydf.format(new Date((long) ye));
            }
            else {
                result[6] = ynf.format(ye);
            }
        }
        return result;
    }

    /**
     * Generates the item label text for an item in a dataset.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return The label text (possibly <code>null).
     */
    public String generateLabel(XYDataset dataset, int series, int item) {
        return generateLabelString(dataset, series, item);
    }

    /**
     * Returns an independent copy of the generator.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if cloning is not supported.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

    /**
     * Tests this object for equality with an arbitrary object.
     *
     * @param obj  the other object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof IntervalXYItemLabelGenerator)) {
            return false;
        }
        return super.equals(obj);
    }

}

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