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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2020, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -----------------
* XYBarDataset.java
* -----------------
* (C) Copyright 2004-2020, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
*/
package org.jfree.data.xy;
import org.jfree.chart.util.PublicCloneable;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.data.general.DatasetChangeListener;
/**
* A dataset wrapper class that converts a standard {@link XYDataset} into an
* {@link IntervalXYDataset} suitable for use in creating XY bar charts.
*/
public class XYBarDataset extends AbstractIntervalXYDataset
implements IntervalXYDataset, DatasetChangeListener, PublicCloneable {
/** The underlying dataset. */
private XYDataset underlying;
/** The bar width. */
private double barWidth;
/**
* Creates a new dataset.
*
* @param underlying the underlying dataset ({@code null} not
* permitted).
* @param barWidth the width of the bars.
*/
public XYBarDataset(XYDataset underlying, double barWidth) {
this.underlying = underlying;
this.underlying.addChangeListener(this);
this.barWidth = barWidth;
}
/**
* Returns the underlying dataset that was specified via the constructor.
*
* @return The underlying dataset (never {@code null}).
*
* @since 1.0.4
*/
public XYDataset getUnderlyingDataset() {
return this.underlying;
}
/**
* Returns the bar width.
*
* @return The bar width.
*
* @see #setBarWidth(double)
* @since 1.0.4
*/
public double getBarWidth() {
return this.barWidth;
}
/**
* Sets the bar width and sends a {@link DatasetChangeEvent} to all
* registered listeners.
*
* @param barWidth the bar width.
*
* @see #getBarWidth()
* @since 1.0.4
*/
public void setBarWidth(double barWidth) {
this.barWidth = barWidth;
notifyListeners(new DatasetChangeEvent(this, this));
}
/**
* Returns the number of series in the dataset.
*
* @return The series count.
*/
@Override
public int getSeriesCount() {
return this.underlying.getSeriesCount();
}
/**
* Returns the key for a series.
*
* @param series the series index (in the range {@code 0} to
* {@code getSeriesCount() - 1}).
*
* @return The series key.
*/
@Override
public Comparable getSeriesKey(int series) {
return this.underlying.getSeriesKey(series);
}
/**
* Returns the number of items in a series.
*
* @param series the series index (zero-based).
*
* @return The item count.
*/
@Override
public int getItemCount(int series) {
return this.underlying.getItemCount(series);
}
/**
* Returns the x-value for an item within a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The x-value.
*
* @see #getXValue(int, int)
*/
@Override
public Number getX(int series, int item) {
return this.underlying.getX(series, item);
}
/**
* Returns the x-value (as a double primitive) for an item within a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*
* @see #getX(int, int)
*/
@Override
public double getXValue(int series, int item) {
return this.underlying.getXValue(series, item);
}
/**
* Returns the y-value for an item within a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The y-value (possibly {@code null}).
*
* @see #getYValue(int, int)
*/
@Override
public Number getY(int series, int item) {
return this.underlying.getY(series, item);
}
/**
* Returns the y-value (as a double primitive) for an item within a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*
* @see #getY(int, int)
*/
@Override
public double getYValue(int series, int item) {
return this.underlying.getYValue(series, item);
}
/**
* Returns the starting X value for the specified series and item.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
@Override
public Number getStartX(int series, int item) {
Number result = null;
Number xnum = this.underlying.getX(series, item);
if (xnum != null) {
result = xnum.doubleValue() - this.barWidth / 2.0;
}
return result;
}
/**
* Returns the starting x-value (as a double primitive) for an item within
* a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*
* @see #getXValue(int, int)
*/
@Override
public double getStartXValue(int series, int item) {
return getXValue(series, item) - this.barWidth / 2.0;
}
/**
* Returns the ending X value for the specified series and item.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
@Override
public Number getEndX(int series, int item) {
Number result = null;
Number xnum = this.underlying.getX(series, item);
if (xnum != null) {
result = xnum.doubleValue() + this.barWidth / 2.0;
}
return result;
}
/**
* Returns the ending x-value (as a double primitive) for an item within
* a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*
* @see #getXValue(int, int)
*/
@Override
public double getEndXValue(int series, int item) {
return getXValue(series, item) + this.barWidth / 2.0;
}
/**
* Returns the starting Y value for the specified series and item.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
@Override
public Number getStartY(int series, int item) {
return this.underlying.getY(series, item);
}
/**
* Returns the starting y-value (as a double primitive) for an item within
* a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*
* @see #getYValue(int, int)
*/
@Override
public double getStartYValue(int series, int item) {
return getYValue(series, item);
}
/**
* Returns the ending Y value for the specified series and item.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*/
@Override
public Number getEndY(int series, int item) {
return this.underlying.getY(series, item);
}
/**
* Returns the ending y-value (as a double primitive) for an item within
* a series.
*
* @param series the series index (zero-based).
* @param item the item index (zero-based).
*
* @return The value.
*
* @see #getYValue(int, int)
*/
@Override
public double getEndYValue(int series, int item) {
return getYValue(series, item);
}
/**
* Receives notification of an dataset change event.
*
* @param event information about the event.
*/
@Override
public void datasetChanged(DatasetChangeEvent event) {
notifyListeners(event);
}
/**
* Tests this dataset for equality with an arbitrary object.
*
* @param obj the object ({@code null} permitted).
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof XYBarDataset)) {
return false;
}
XYBarDataset that = (XYBarDataset) obj;
if (!this.underlying.equals(that.underlying)) {
return false;
}
if (this.barWidth != that.barWidth) {
return false;
}
return true;
}
/**
* Returns an independent copy of the dataset. Note that:
*
*
the underlying dataset is only cloned if it implements the
* {@link PublicCloneable} interface;
*
the listeners registered with this dataset are not carried over to
* the cloned dataset.
*
*
* @return An independent copy of the dataset.
*
* @throws CloneNotSupportedException if the dataset cannot be cloned for
* any reason.
*/
@Override
public Object clone() throws CloneNotSupportedException {
XYBarDataset clone = (XYBarDataset) super.clone();
if (this.underlying instanceof PublicCloneable) {
PublicCloneable pc = (PublicCloneable) this.underlying;
clone.underlying = (XYDataset) pc.clone();
}
return clone;
}
}
