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org.jfree.data.xy

Class XYBarDataset

Implemented Interfaces:
Cloneable, Dataset, DatasetChangeListener, EventListener, IntervalXYDataset, ObjectInputValidation, Serializable, SeriesChangeListener, SeriesDataset, XYDataset
public class XYBarDataset
extends AbstractIntervalXYDataset
implements IntervalXYDataset, DatasetChangeListener
A dataset wrapper class that converts a standard XYDataset into an IntervalXYDataset suitable for use in creating XY bar charts.

Constructor Summary

XYBarDataset(XYDataset underlying, double barWidth)
Creates a new dataset.

Method Summary

void
datasetChanged(DatasetChangeEvent event)
Receives notification of an dataset change event.
Number
getEndX(int series, int item)
Returns the ending X value for the specified series and item.
Number
getEndY(int series, int item)
Returns the ending Y value for the specified series and item.
int
getItemCount(int series)
Returns the number of items in a series.
int
getSeriesCount()
Returns the number of series in the dataset.
Comparable
getSeriesKey(int series)
Returns the key for a series.
Number
getStartX(int series, int item)
Returns the starting X value for the specified series and item.
Number
getStartY(int series, int item)
Returns the starting Y value for the specified series and item.
Number
getX(int series, int item)
Returns the x-value for an item within a series.
Number
getY(int series, int item)
Returns the y-value for an item within a series.

Methods inherited from class org.jfree.data.xy.AbstractIntervalXYDataset

getEndXValue, getEndYValue, getStartXValue, getStartYValue

Methods inherited from class org.jfree.data.xy.AbstractXYDataset

getDomainOrder, getXValue, getYValue

Methods inherited from class org.jfree.data.general.AbstractSeriesDataset

getSeriesCount, getSeriesKey, indexOf, seriesChanged

Methods inherited from class org.jfree.data.general.AbstractDataset

addChangeListener, clone, fireDatasetChanged, getGroup, hasListener, notifyListeners, removeChangeListener, setGroup, validateObject

Constructor Details

XYBarDataset

public XYBarDataset(XYDataset underlying,
                    double barWidth)
Creates a new dataset.
Parameters:
underlying - the underlying dataset.
barWidth - the width of the bars.

Method Details

datasetChanged

public void datasetChanged(DatasetChangeEvent event)
Receives notification of an dataset change event.
Specified by:
datasetChanged in interface DatasetChangeListener
Parameters:
event - information about the event.

getEndX

public Number getEndX(int series,
                      int item)
Returns the ending X value for the specified series and item.
Specified by:
getEndX in interface IntervalXYDataset
Parameters:
series - the series index (zero-based).
item - the item index (zero-based).
Returns:
The value.

getEndY

public Number getEndY(int series,
                      int item)
Returns the ending Y value for the specified series and item.
Specified by:
getEndY in interface IntervalXYDataset
Parameters:
series - the series index (zero-based).
item - the item index (zero-based).
Returns:
The value.

getItemCount

public int getItemCount(int series)
Returns the number of items in a series.
Specified by:
getItemCount in interface XYDataset
Parameters:
series - the series index (zero-based).
Returns:
The item count.

getSeriesCount

public int getSeriesCount()
Returns the number of series in the dataset.
Specified by:
getSeriesCount in interface SeriesDataset
Overrides:
getSeriesCount in interface AbstractSeriesDataset
Returns:
The series count.

getSeriesKey

public Comparable getSeriesKey(int series)
Returns the key for a series.
Specified by:
getSeriesKey in interface SeriesDataset
Overrides:
getSeriesKey in interface AbstractSeriesDataset
Parameters:
series - the series index (in the range 0 to getSeriesCount() - 1).
Returns:
The series key.

getStartX

public Number getStartX(int series,
                        int item)
Returns the starting X value for the specified series and item.
Specified by:
getStartX in interface IntervalXYDataset
Parameters:
series - the series index (zero-based).
item - the item index (zero-based).
Returns:
The value.

getStartY

public Number getStartY(int series,
                        int item)
Returns the starting Y value for the specified series and item.
Specified by:
getStartY in interface IntervalXYDataset
Parameters:
series - the series index (zero-based).
item - the item index (zero-based).
Returns:
The value.

getX

public Number getX(int series,
                   int item)
Returns the x-value for an item within a series. The x-values may or may not be returned in ascending order, that is up to the class implementing the interface.
Specified by:
getX in interface XYDataset
Parameters:
series - the series index (zero-based).
item - the item index (zero-based).
Returns:
The x-value.

getY

public Number getY(int series,
                   int item)
Returns the y-value for an item within a series.
Specified by:
getY in interface XYDataset
Parameters:
series - the series index (zero-based).
item - the item index (zero-based).
Returns:
The y-value (possibly null).

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