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jfreechart example source code file (DefaultOHLCDataset.java)

This example jfreechart source code file (DefaultOHLCDataset.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, clonenotsupportedexception, comparable, comparable, date, defaultohlcdataset, defaultohlcdataset, number, number, object, ohlcdataitem, ohlcdataitem, ohlcdataset, publiccloneable, util

The jfreechart DefaultOHLCDataset.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.]
 *
 * -----------------------
 * DefaultOHLCDataset.java
 * -----------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 03-Dec-2003 : Version 1 (DG);
 * 05-May-2004 : Now extends AbstractXYDataset (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with
 *               getYValue() (DG);
 * 29-Apr-2005 : Added equals() method (DG);
 * 22-Apr-2008 : Implemented PublicCloneable, and fixed cloning bug (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.  This
 * implementation supports only one series.
 */
public class DefaultOHLCDataset extends AbstractXYDataset
        implements OHLCDataset, PublicCloneable {

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

    /** Storage for the data items. */
    private OHLCDataItem[] data;

    /**
     * Creates a new dataset.
     *
     * @param key  the series key.
     * @param data  the data items.
     */
    public DefaultOHLCDataset(Comparable key, OHLCDataItem[] data) {
        this.key = key;
        this.data = data;
    }

    /**
     * Returns the series key.
     *
     * @param series  the series index (ignored).
     *
     * @return The series key.
     */
    public Comparable getSeriesKey(int series) {
        return this.key;
    }

    /**
     * Returns the x-value for a data item.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The x-value.
     */
    public Number getX(int series, int item) {
        return new Long(this.data[item].getDate().getTime());
    }

    /**
     * Returns the x-value for a data item as a date.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The x-value as a date.
     */
    public Date getXDate(int series, int item) {
        return this.data[item].getDate();
    }

    /**
     * Returns the y-value.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The y value.
     */
    public Number getY(int series, int item) {
        return getClose(series, item);
    }

    /**
     * Returns the high value.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The high value.
     */
    public Number getHigh(int series, int item) {
        return this.data[item].getHigh();
    }

    /**
     * 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.
     */
    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.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The low value.
     */
    public Number getLow(int series, int item) {
        return this.data[item].getLow();
    }

    /**
     * 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.
     */
    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.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The open value.
     */
    public Number getOpen(int series, int item) {
        return this.data[item].getOpen();
    }

    /**
     * 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.
     */
    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.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The close value.
     */
    public Number getClose(int series, int item) {
        return this.data[item].getClose();
    }

    /**
     * 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.
     */
    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 trading volume.
     *
     * @param series  the series index (ignored).
     * @param item  the item index (zero-based).
     *
     * @return The trading volume.
     */
    public Number getVolume(int series, int item) {
        return this.data[item].getVolume();
    }

    /**
     * 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.
     */
    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 series count.
     *
     * @return 1.
     */
    public int getSeriesCount() {
        return 1;
    }

    /**
     * Returns the item count for the specified series.
     *
     * @param series  the series index (ignored).
     *
     * @return The item count.
     */
    public int getItemCount(int series) {
        return this.data.length;
    }

    /**
     * Sorts the data into ascending order by date.
     */
    public void sortDataByDate() {
        Arrays.sort(this.data);
    }

    /**
     * Tests this instance for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof DefaultOHLCDataset)) {
            return false;
        }
        DefaultOHLCDataset that = (DefaultOHLCDataset) obj;
        if (!this.key.equals(that.key)) {
            return false;
        }
        if (!Arrays.equals(this.data, that.data)) {
            return false;
        }
        return true;
    }

    /**
     * Returns an independent copy of this dataset.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException
     */
    public Object clone() throws CloneNotSupportedException {
        DefaultOHLCDataset clone = (DefaultOHLCDataset) super.clone();
        clone.data = new OHLCDataItem[this.data.length];
        System.arraycopy(this.data, 0, clone.data, 0, this.data.length);
        return clone;
    }

}

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