Package org.jfree.chart.demo

Class EmptyXYDataset

java.lang.Object

org.jfree.data.AbstractDataset

org.jfree.data.AbstractSeriesDataset

org.jfree.data.AbstractXYDataset

org.jfree.chart.demo.EmptyXYDataset

All Implemented Interfaces:

ObjectInputValidation, Serializable, Cloneable, EventListener, Dataset, SeriesChangeListener, SeriesDataset, XYDataset

public class EmptyXYDataset
extends AbstractXYDataset
implements XYDataset

An empty dataset for testing purposes.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
EmptyXYDataset()	Default constructor.

Method Summary

Modifier and Type	Method	Description
int	getItemCount(int series)	Returns the number of items in the specified series.
int	getSeriesCount()	Returns the number of series in the dataset.
String	getSeriesName(int series)	Returns the name of the series.
Number	getXValue(int series, int item)	Returns the x-value for the specified series and item.
Number	getYValue(int series, int item)	Returns the y-value for the specified series and item.

Methods inherited from class org.jfree.data.AbstractXYDataset

getX, getY

Methods inherited from class org.jfree.data.AbstractSeriesDataset

seriesChanged

Methods inherited from class org.jfree.data.AbstractDataset

addChangeListener, clone, getGroup, removeChangeListener, setGroup, validateObject

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jfree.data.Dataset

addChangeListener, getGroup, removeChangeListener, setGroup

Methods inherited from interface org.jfree.data.XYDataset

getX, getY

Constructor Details

EmptyXYDataset

public EmptyXYDataset()

Default constructor.

Method Details

getXValue

public Number getXValue(int series,
int item)

Returns the x-value for the specified series and item.

Specified by:

getXValue in interface XYDataset

Parameters:

series - the series (zero-based index).

item - the item (zero-based index).

Returns:

the x-value (always null for this class).

getYValue

public Number getYValue(int series,
int item)

Returns the y-value for the specified series and item.

Specified by:

getYValue in interface XYDataset

Parameters:

series - the series (zero-based index).

item - the item (zero-based index).

Returns:

the y-value (always null for this class).

getSeriesCount

public int getSeriesCount()

Returns the number of series in the dataset.

Specified by:

getSeriesCount in interface SeriesDataset

Specified by:

getSeriesCount in class AbstractSeriesDataset

Returns:

the series count (always zero for this class).

getSeriesName

public String getSeriesName(int series)

Returns the name of the series.

Specified by:

getSeriesName in interface SeriesDataset

Specified by:

getSeriesName in class AbstractSeriesDataset

Parameters:

series - the series (zero-based index).

Returns:

the name of the series (always null in this class).

getItemCount

public int getItemCount(int series)

Returns the number of items in the specified series.

Specified by:

getItemCount in interface XYDataset

Parameters:

series - the series (zero-based index).

Returns:

the item count (always zero in this class).