jfreechart example source code file (CombinedDataset.java)
The jfreechart CombinedDataset.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.]
*
* --------------------
* CombinedDataset.java
* --------------------
* (C) Copyright 2001-2009, by Bill Kelemen and Contributors.
*
* Original Author: Bill Kelemen;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* 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);
* 06-May-2004 : Now extends AbstractIntervalXYDataset and added other methods
* that return double primitives (DG);
* 15-Jul-2004 : Switched getX() with getXValue() and getY() with
* getYValue() (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
* 04-Feb-2009 : Deprecated the class (DG);
*
*/
package org.jfree.data.general;
import java.util.List;
import org.jfree.data.xy.AbstractIntervalXYDataset;
import org.jfree.data.xy.IntervalXYDataset;
import org.jfree.data.xy.OHLCDataset;
import org.jfree.data.xy.XYDataset;
/**
* This class can combine instances of {@link XYDataset}, {@link OHLCDataset}
* and {@link IntervalXYDataset} together exposing the union of all the series
* under one dataset.
*
* @deprecated As of version 1.0.13. This class will be removed from
* JFreeChart 1.2.0 onwards. Anyone needing this facility will need to
* maintain it outside of JFreeChart.
*/
public class CombinedDataset extends AbstractIntervalXYDataset
implements XYDataset, OHLCDataset, IntervalXYDataset,
CombinationDataset {
/** Storage for the datasets we combine. */
private List datasetInfo = new java.util.ArrayList();
/**
* Default constructor for an empty combination.
*/
public CombinedDataset() {
super();
}
/**
* 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++) {
this.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 this.datasetInfo.size();
}
/**
* Returns the key for a series.
*
* @param series the series (zero-based index).
*
* @return The key for a series.
*/
public Comparable getSeriesKey(int series) {
DatasetInfo di = getDatasetInfo(series);
return di.data.getSeriesKey(di.series);
}
///////////////////////////////////////////////////////////////////////////
// From XYDataset
///////////////////////////////////////////////////////////////////////////
/**
* Returns the X-value for the specified series and item.
* <P>
* Note: throws <code>ClassCastException 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 getX(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((XYDataset) di.data).getX(di.series, item);
}
/**
* Returns the Y-value for the specified series and item.
* <P>
* Note: throws <code>ClassCastException 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 getY(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((XYDataset) di.data).getY(di.series, item);
}
/**
* Returns the number of items in a series.
* <P>
* Note: throws <code>ClassCastException 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 if the series is not from a
* {@link OHLCDataset}.
*
* @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 getHigh(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((OHLCDataset) di.data).getHigh(di.series, 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.
*/
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 the specified series and item.
* <P>
* Note: throws <code>ClassCastException if the series is not from a
* {@link OHLCDataset}.
*
* @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 getLow(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((OHLCDataset) di.data).getLow(di.series, 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.
*/
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 the specified series and item.
* <P>
* Note: throws <code>ClassCastException if the series is not from a
* {@link OHLCDataset}.
*
* @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 getOpen(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((OHLCDataset) di.data).getOpen(di.series, 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.
*/
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 the specified series and item.
* <P>
* Note: throws <code>ClassCastException if the series is not from a
* {@link OHLCDataset}.
*
* @param series the index of the series of interest (zero-based).
* @param item the index of the item of interest (zero-based).
*
* @return The close-value for the specified series and item.
*/
public Number getClose(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((OHLCDataset) di.data).getClose(di.series, 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.
*/
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 the specified series and item.
* <P>
* Note: throws <code>ClassCastException if the series is not from a
* {@link OHLCDataset}.
*
* @param series the index of the series of interest (zero-based).
* @param item the index of the item of interest (zero-based).
*
* @return The volume value for the specified series and item.
*/
public Number getVolume(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
return ((OHLCDataset) di.data).getVolume(di.series, 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.
*/
public double getVolumeValue(int series, int item) {
double result = Double.NaN;
Number volume = getVolume(series, item);
if (volume != null) {
result = volume.doubleValue();
}
return result;
}
///////////////////////////////////////////////////////////////////////////
// From IntervalXYDataset
///////////////////////////////////////////////////////////////////////////
/**
* Returns the starting X value for the specified series and item.
*
* @param series the index of the series of interest (zero-based).
* @param item the index of the item of interest (zero-based).
*
* @return The value.
*/
public Number getStartX(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
if (di.data instanceof IntervalXYDataset) {
return ((IntervalXYDataset) di.data).getStartX(di.series, item);
}
else {
return getX(series, item);
}
}
/**
* Returns the ending X value for the specified series and item.
*
* @param series the index of the series of interest (zero-based).
* @param item the index of the item of interest (zero-based).
*
* @return The value.
*/
public Number getEndX(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
if (di.data instanceof IntervalXYDataset) {
return ((IntervalXYDataset) di.data).getEndX(di.series, item);
}
else {
return getX(series, item);
}
}
/**
* Returns the starting Y value for the specified series and item.
*
* @param series the index of the series of interest (zero-based).
* @param item the index of the item of interest (zero-based).
*
* @return The starting Y value for the specified series and item.
*/
public Number getStartY(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
if (di.data instanceof IntervalXYDataset) {
return ((IntervalXYDataset) di.data).getStartY(di.series, item);
}
else {
return getY(series, item);
}
}
/**
* Returns the ending Y value for the specified series and item.
*
* @param series the index of the series of interest (zero-based).
* @param item the index of the item of interest (zero-based).
*
* @return The ending Y value for the specified series and item.
*/
public Number getEndY(int series, int item) {
DatasetInfo di = getDatasetInfo(series);
if (di.data instanceof IntervalXYDataset) {
return ((IntervalXYDataset) di.data).getEndY(di.series, item);
}
else {
return getY(series, item);
}
}
///////////////////////////////////////////////////////////////////////////
// New methods from CombinationDataset
///////////////////////////////////////////////////////////////////////////
/**
* Returns the parent Dataset of this combination. If there is more than
* one parent, or a child is found that is not a CombinationDataset, then
* returns <code>null.
*
* @return The parent Dataset of this combination or <code>null.
*/
public SeriesDataset getParent() {
SeriesDataset parent = null;
for (int i = 0; i < this.datasetInfo.size(); i++) {
SeriesDataset child = getDatasetInfo(i).data;
if (child instanceof CombinationDataset) {
SeriesDataset childParent
= ((CombinationDataset) child).getParent();
if (parent == null) {
parent = childParent;
}
else if (parent != childParent) {
return null;
}
}
else {
return null;
}
}
return parent;
}
/**
* Returns a map or indirect indexing form our series into parent's series.
* Prior to calling this method, the client should check getParent() to make
* sure the CombinationDataset uses the same parent. If not, the map
* returned by this method will be invalid or null.
*
* @return A map or indirect indexing form our series into parent's series.
*
* @see #getParent()
*/
public int[] getMap() {
int[] map = null;
for (int i = 0; i < this.datasetInfo.size(); i++) {
SeriesDataset child = getDatasetInfo(i).data;
if (child instanceof CombinationDataset) {
int[] childMap = ((CombinationDataset) child).getMap();
if (childMap == null) {
return null;
}
map = joinMap(map, childMap);
}
else {
return null;
}
}
return map;
}
///////////////////////////////////////////////////////////////////////////
// New Methods
///////////////////////////////////////////////////////////////////////////
/**
* Returns the child position.
*
* @param child the child dataset.
*
* @return The position.
*/
public int getChildPosition(Dataset child) {
int n = 0;
for (int i = 0; i < this.datasetInfo.size(); i++) {
SeriesDataset childDataset = getDatasetInfo(i).data;
if (childDataset instanceof CombinedDataset) {
int m = ((CombinedDataset) childDataset)
.getChildPosition(child);
if (m >= 0) {
return n + m;
}
n++;
}
else {
if (child == childDataset) {
return n;
}
n++;
}
}
return -1;
}
///////////////////////////////////////////////////////////////////////////
// Private
///////////////////////////////////////////////////////////////////////////
/**
* Returns the DatasetInfo object associated with the series.
*
* @param series the index of the series.
*
* @return The DatasetInfo object associated with the series.
*/
private DatasetInfo getDatasetInfo(int series) {
return (DatasetInfo) this.datasetInfo.get(series);
}
/**
* Joins two map arrays (int[]) together.
*
* @param a the first array.
* @param b the second array.
*
* @return A copy of { a[], b[] }.
*/
private int[] joinMap(int[] a, int[] b) {
if (a == null) {
return b;
}
if (b == null) {
return a;
}
int[] result = new int[a.length + b.length];
System.arraycopy(a, 0, result, 0, a.length);
System.arraycopy(b, 0, result, a.length, b.length);
return result;
}
/**
* Private class to store as pairs (SeriesDataset, series) for all combined
* series.
*/
private class DatasetInfo {
/** The dataset. */
private SeriesDataset data;
/** The series. */
private int series;
/**
* Creates a new dataset info record.
*
* @param data the dataset.
* @param series the series.
*/
DatasetInfo(SeriesDataset data, int series) {
this.data = data;
this.series = series;
}
}
}
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