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jfreechart example source code file (DefaultHighLowDataset.java)

This example jfreechart source code file (DefaultHighLowDataset.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

abstractxydataset, comparable, comparable, date, date, defaulthighlowdataset, defaulthighlowdataset, double, illegalargumentexception, null, number, number, ohlcdataset, publiccloneable, util

The jfreechart DefaultHighLowDataset.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.]
 *
 * --------------------------
 * DefaultHighLowDataset.java
 * --------------------------
 * (C) Copyright 2002-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 21-Mar-2002 : Version 1 (DG);
 * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 06-May-2004 : Now extends AbstractXYDataset and added new methods from
 *               HighLowDataset (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with
 *               getYValue() (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 28-Nov-2006 : Added equals() method override (DG);
 * 22-Apr-2008 : Implemented PublicCloneable (DG);
 *
 */

package org.jfree.data.xy;

import java.util.Arrays;
import java.util.Date;

import org.jfree.util.PublicCloneable;

/**
 * A simple implementation of the {@link OHLCDataset} interface.  See also
 * the {@link DefaultOHLCDataset} class, which provides another implementation
 * that is very similar.
 */
public class DefaultHighLowDataset extends AbstractXYDataset
        implements OHLCDataset, PublicCloneable {

    /** The series key. */
    private Comparable seriesKey;

    /** Storage for the dates. */
    private Date[] date;

    /** Storage for the high values. */
    private Number[] high;

    /** Storage for the low values. */
    private Number[] low;

    /** Storage for the open values. */
    private Number[] open;

    /** Storage for the close values. */
    private Number[] close;

    /** Storage for the volume values. */
    private Number[] volume;

    /**
     * Constructs a new high/low/open/close dataset.
     * <p>
     * The current implementation allows only one series in the dataset.
     * This may be extended in a future version.
     *
     * @param seriesKey  the key for the series (<code>null not
     *     permitted).
     * @param date  the dates (<code>null not permitted).
     * @param high  the high values (<code>null not permitted).
     * @param low  the low values (<code>null not permitted).
     * @param open  the open values (<code>null not permitted).
     * @param close  the close values (<code>null not permitted).
     * @param volume  the volume values (<code>null not permitted).
     */
    public DefaultHighLowDataset(Comparable seriesKey, Date[] date,
            double[] high, double[] low, double[] open, double[] close,
            double[] volume) {

        if (seriesKey == null) {
            throw new IllegalArgumentException("Null 'series' argument.");
        }
        if (date == null) {
            throw new IllegalArgumentException("Null 'date' argument.");
        }
        this.seriesKey = seriesKey;
        this.date = date;
        this.high = createNumberArray(high);
        this.low = createNumberArray(low);
        this.open = createNumberArray(open);
        this.close = createNumberArray(close);
        this.volume = createNumberArray(volume);

    }

    /**
     * Returns the key for the series stored in this dataset.
     *
     * @param series  the index of the series (ignored, this dataset supports
     *     only one series and this method always returns the key for series 0).
     *
     * @return The series key (never <code>null).
     */
    public Comparable getSeriesKey(int series) {
        return this.seriesKey;
    }

    /**
     * Returns the x-value for one item in a series.  The value returned is a
     * <code>Long instance generated from the underlying
     * <code>Date object.  To avoid generating a new object instance,
     * you might prefer to call {@link #getXValue(int, int)}.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The x-value.
     *
     * @see #getXValue(int, int)
     * @see #getXDate(int, int)
     */
    public Number getX(int series, int item) {
        return new Long(this.date[item].getTime());
    }

    /**
     * Returns the x-value for one item in a series, as a Date.
     * <p>
     * This method is provided for convenience only.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The x-value as a Date.
     *
     * @see #getX(int, int)
     */
    public Date getXDate(int series, int item) {
        return this.date[item];
    }

    /**
     * Returns the y-value for one item in a series.
     * <p>
     * This method (from the {@link XYDataset} interface) is mapped to the
     * {@link #getCloseValue(int, int)} method.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The y-value.
     *
     * @see #getYValue(int, int)
     */
    public Number getY(int series, int item) {
        return getClose(series, item);
    }

    /**
     * Returns the high-value for one item in a series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The high-value.
     *
     * @see #getHighValue(int, int)
     */
    public Number getHigh(int series, int item) {
        return this.high[item];
    }

    /**
     * Returns the high-value (as a double primitive) for an item within a
     * series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The high-value.
     *
     * @see #getHigh(int, int)
     */
    public double getHighValue(int series, int item) {
        double result = Double.NaN;
        Number high = getHigh(series, item);
        if (high != null) {
            result = high.doubleValue();
        }
        return result;
    }

    /**
     * Returns the low-value for one item in a series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The low-value.
     *
     * @see #getLowValue(int, int)
     */
    public Number getLow(int series, int item) {
        return this.low[item];
    }

    /**
     * Returns the low-value (as a double primitive) for an item within a
     * series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The low-value.
     *
     * @see #getLow(int, int)
     */
    public double getLowValue(int series, int item) {
        double result = Double.NaN;
        Number low = getLow(series, item);
        if (low != null) {
            result = low.doubleValue();
        }
        return result;
    }

    /**
     * Returns the open-value for one item in a series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The open-value.
     *
     * @see #getOpenValue(int, int)
     */
    public Number getOpen(int series, int item) {
        return this.open[item];
    }

    /**
     * Returns the open-value (as a double primitive) for an item within a
     * series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The open-value.
     *
     * @see #getOpen(int, int)
     */
    public double getOpenValue(int series, int item) {
        double result = Double.NaN;
        Number open = getOpen(series, item);
        if (open != null) {
            result = open.doubleValue();
        }
        return result;
    }

    /**
     * Returns the close-value for one item in a series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The close-value.
     *
     * @see #getCloseValue(int, int)
     */
    public Number getClose(int series, int item) {
        return this.close[item];
    }

    /**
     * Returns the close-value (as a double primitive) for an item within a
     * series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The close-value.
     *
     * @see #getClose(int, int)
     */
    public double getCloseValue(int series, int item) {
        double result = Double.NaN;
        Number close = getClose(series, item);
        if (close != null) {
            result = close.doubleValue();
        }
        return result;
    }

    /**
     * Returns the volume-value for one item in a series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The volume-value.
     *
     * @see #getVolumeValue(int, int)
     */
    public Number getVolume(int series, int item) {
        return this.volume[item];
    }

    /**
     * Returns the volume-value (as a double primitive) for an item within a
     * series.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The volume-value.
     *
     * @see #getVolume(int, int)
     */
    public double getVolumeValue(int series, int item) {
        double result = Double.NaN;
        Number volume = getVolume(series, item);
        if (volume != null) {
            result = volume.doubleValue();
        }
        return result;
    }

    /**
     * Returns the number of series in the dataset.
     * <p>
     * This implementation only allows one series.
     *
     * @return The number of series.
     */
    public int getSeriesCount() {
        return 1;
    }

    /**
     * Returns the number of items in the specified series.
     *
     * @param series  the index (zero-based) of the series.
     *
     * @return The number of items in the specified series.
     */
    public int getItemCount(int series) {
        return this.date.length;
    }

    /**
     * Tests this dataset for equality with an arbitrary instance.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof DefaultHighLowDataset)) {
            return false;
        }
        DefaultHighLowDataset that = (DefaultHighLowDataset) obj;
        if (!this.seriesKey.equals(that.seriesKey)) {
            return false;
        }
        if (!Arrays.equals(this.date, that.date)) {
            return false;
        }
        if (!Arrays.equals(this.open, that.open)) {
            return false;
        }
        if (!Arrays.equals(this.high, that.high)) {
            return false;
        }
        if (!Arrays.equals(this.low, that.low)) {
            return false;
        }
        if (!Arrays.equals(this.close, that.close)) {
            return false;
        }
        if (!Arrays.equals(this.volume, that.volume)) {
            return false;
        }
        return true;
    }

    /**
     * Constructs an array of Number objects from an array of doubles.
     *
     * @param data  the double values to convert (<code>null not
     *     permitted).
     *
     * @return The data as an array of Number objects.
     */
    public static Number[] createNumberArray(double[] data) {
        Number[] result = new Number[data.length];
        for (int i = 0; i < data.length; i++) {
            result[i] = new Double(data[i]);
        }
        return result;
    }

}

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