org.jfree.data.xy

Interface XYDataset

All Superinterfaces:

Dataset, SeriesDataset

All Known Subinterfaces:

IntervalXYDataset, IntervalXYZDataset, OHLCDataset, TableXYDataset, XYZDataset

All Known Implementing Classes:

AbstractIntervalXYDataset, AbstractXYDataset, XYSeriesCollection

public interface XYDataset
extends SeriesDataset

An interface through which data in the form of (x, y) items can be accessed.

Method Summary

Modifier and Type	Method and Description
DomainOrder	getDomainOrder() Returns the order of the domain (or X) values returned by the dataset.
int	getItemCount(int series) Returns the number of items in a series.
java.lang.Number	getX(int series, int item) Returns the x-value for an item within a series.
double	getXValue(int series, int item) Returns the x-value for an item within a series.
java.lang.Number	getY(int series, int item) Returns the y-value for an item within a series.
double	getYValue(int series, int item) Returns the y-value (as a double primitive) for an item within a series.

Methods inherited from interface org.jfree.data.general.SeriesDataset

getSeriesCount, getSeriesKey, indexOf

Methods inherited from interface org.jfree.data.general.Dataset

addChangeListener, getGroup, removeChangeListener, setGroup

Method Detail

getDomainOrder

DomainOrder getDomainOrder()

Returns the order of the domain (or X) values returned by the dataset.

Returns:

The order (never null).

getItemCount

int getItemCount(int series)

Returns the number of items in a series.

It is recommended that classes that implement this method should throw an IllegalArgumentException if the series argument is outside the specified range.

Parameters:

series - the series index (in the range 0 to getSeriesCount() - 1).

Returns:

The item count.

getX

java.lang.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.

Parameters:

series - the series index (in the range 0 to getSeriesCount() - 1).

item - the item index (in the range 0 to getItemCount(series)).

Returns:

The x-value (never null).

getXValue

double getXValue(int series,
                 int item)

Returns the x-value for an item within a series.

Parameters:

series - the series index (in the range 0 to getSeriesCount() - 1).

item - the item index (in the range 0 to getItemCount(series)).

Returns:

The x-value.

getY

java.lang.Number getY(int series,
                      int item)

Returns the y-value for an item within a series.

Parameters:

series - the series index (in the range 0 to getSeriesCount() - 1).

item - the item index (in the range 0 to getItemCount(series)).

Returns:

The y-value (possibly null).

getYValue

double getYValue(int series,
                 int item)

Returns the y-value (as a double primitive) for an item within a series.

Parameters:

series - the series index (in the range 0 to getSeriesCount() - 1).

item - the item index (in the range 0 to getItemCount(series)).

Returns:

The y-value.