combineddataset.java

Web图形化的Java库

/* ======================================
 * JFreeChart : a free Java chart library
 * ======================================
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * --------------------
 * CombinedDataset.java
 * --------------------
 * (C) Copyright 2001-2003, by Bill Kelemen.
 *
 * Original Author:  Bill Kelemen;
 * Contributor(s):   -;
 *
 * $Id: CombinedDataset.java,v 1.5 2003/07/25 12:31:09 mungady Exp $
 *
 * Changes
 * -------
 * 06-Dec-2001 : Version 1 (BK);
 * 27-Dec-2001 : Fixed bug in getChildPosition method (BK);
 * 29-Dec-2001 : Fixed bug in getChildPosition method with complex CombinePlot (BK);
 * 05-Feb-2002 : Small addition to the interface HighLowDataset, as requested by Sylvain
 *               Vieujot (DG);
 * 14-Feb-2002 : Added bug fix for IntervalXYDataset methods, submitted by Gyula Kun-Szabo (DG);
 * 11-Jun-2002 : Updated for change in event constructor (DG);
 * 04-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 *
 */

package org.jfree.data;

import java.util.List;

/**
 * This class can combine instances of {@link XYDataset}, {@link HighLowDataset} and 
 * {@link IntervalXYDataset} together exposing the union of all the series under one dataset.  
 *
 * @author Bill Kelemen ([e-mail])
 */
public class CombinedDataset extends AbstractSeriesDataset
                             implements XYDataset, HighLowDataset, IntervalXYDataset,
                                        CombinationDataset {

    /** Storage for the datasets we combine. */
    private List datasetInfo = new java.util.ArrayList();

    /**
     * Default constructor for an empty combination.
     */
    public CombinedDataset() {
    }

    /**
     * Creates a CombinedDataset initialized with an array of SeriesDatasets.
     *
     * @param data  array of SeriesDataset that contains the SeriesDatasets to combine.
     */
    public CombinedDataset(SeriesDataset[] data) {
        add(data);
    }

    /**
     * Adds one SeriesDataset to the combination. Listeners are notified of the change.
     *
     * @param data  the SeriesDataset to add.
     */
    public void add(SeriesDataset data) {

        fastAdd(data);
        DatasetChangeEvent event = new DatasetChangeEvent(this, this);
        notifyListeners(event);

    }

    /**
     * Adds an array of SeriesDataset's to the combination. Listeners are
     * notified of the change.
     *
     * @param data  array of SeriesDataset to add
     */
    public void add(SeriesDataset[] data) {

        for (int i = 0; i < data.length; i++) {
            fastAdd(data[i]);
        }
        DatasetChangeEvent event = new DatasetChangeEvent(this, this);
        notifyListeners(event);

    }

    /**
     * Adds one series from a SeriesDataset to the combination. Listeners are
     * notified of the change.
     *
     * @param data  the SeriesDataset where series is contained
     * @param series  series to add
     */
    public void add(SeriesDataset data, int series) {
        add(new SubSeriesDataset(data, series));
    }

    /**
     * Fast add of a SeriesDataset. Does not notify listeners of the change.
     *
     * @param data  SeriesDataset to add
     */
    private void fastAdd(SeriesDataset data) {
        for (int i = 0; i < data.getSeriesCount(); i++) {
            datasetInfo.add(new DatasetInfo(data, i));
        }
    }

    ///////////////////////////////////////////////////////////////////////////
    // From SeriesDataset
    ///////////////////////////////////////////////////////////////////////////

    /**
     * Returns the number of series in the dataset.
     *
     * @return The number of series in the dataset.
     */
    public int getSeriesCount() {
        return datasetInfo.size();
    }

    /**
     * Returns the name of a series.
     *
     * @param series  the series (zero-based index).
     *
     * @return the name of a series.
     */
    public String getSeriesName(int series) {
        DatasetInfo di = getDatasetInfo(series);
        return di.data.getSeriesName(di.series);
    }

    ///////////////////////////////////////////////////////////////////////////
    // From XYDataset
    ///////////////////////////////////////////////////////////////////////////

    /**
     * Returns the X-value for the specified series and item.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a {@link XYDataset}.
     *
     * @param series  the index of the series of interest (zero-based).
     * @param item  the index of the item of interest (zero-based).
     *
     * @return the X-value for the specified series and item.
     */
    public Number getXValue(int series, int item) {
        DatasetInfo di = getDatasetInfo(series);
        return ((XYDataset) di.data).getXValue(di.series, item);
    }

    /**
     * Returns the Y-value for the specified series and item.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a {@link XYDataset}.
     *
     * @param series  the index of the series of interest (zero-based).
     * @param item  the index of the item of interest (zero-based).
     *
     * @return the Y-value for the specified series and item.
     */
    public Number getYValue(int series, int item) {
        DatasetInfo di = getDatasetInfo(series);
        return ((XYDataset) di.data).getYValue(di.series, item);
    }

    /**
     * Returns the number of items in a series.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a {@link XYDataset}.
     *
     * @param series  the index of the series of interest (zero-based).
     *
     * @return the number of items in a series.
     */
    public int getItemCount(int series) {
        DatasetInfo di = getDatasetInfo(series);
        return ((XYDataset) di.data).getItemCount(di.series);
    }

    ///////////////////////////////////////////////////////////////////////////
    // From HighLowDataset
    ///////////////////////////////////////////////////////////////////////////

    /**
     * Returns the high-value for the specified series and item.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a 
     * {@link HighLowDataset}.
     *
     * @param series  the index of the series of interest (zero-based).
     * @param item  the index of the item of interest (zero-based).
     *
     * @return the high-value for the specified series and item.
     */
    public Number getHighValue(int series, int item) {
        DatasetInfo di = getDatasetInfo(series);
        return ((HighLowDataset) di.data).getHighValue(di.series, item);
    }

    /**
     * Returns the low-value for the specified series and item.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a 
     * {@link HighLowDataset}.
     *
     * @param series  the index of the series of interest (zero-based).
     * @param item  the index of the item of interest (zero-based).
     *
     * @return the low-value for the specified series and item.
     */
    public Number getLowValue(int series, int item) {
        DatasetInfo di = getDatasetInfo(series);
        return ((HighLowDataset) di.data).getLowValue(di.series, item);
    }

    /**
     * Returns the open-value for the specified series and item.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a 
     * {@link HighLowDataset}.
     *
     * @param series  the index of the series of interest (zero-based).
     * @param item  the index of the item of interest (zero-based).
     *
     * @return the open-value for the specified series and item.
     */
    public Number getOpenValue(int series, int item) {
        DatasetInfo di = getDatasetInfo(series);
        return ((HighLowDataset) di.data).getOpenValue(di.series, item);
    }

    /**
     * Returns the close-value for the specified series and item.
     * <P>
     * Note:  throws <code>ClassCastException</code> if the series is not from a 
     * {@link HighLowDataset}.
     *
     * @param series  the index of the series of interest (zero-based).