org.jfree.data
Interface XYDataset

All Superinterfaces:

Dataset, SeriesDataset

All Known Subinterfaces:

ContourDataset, HighLowDataset, IntervalXYDataset, IntervalXYZDataset, SignalsDataset, WindDataset, XYZDataset

All Known Implementing Classes:

CombinedDataset, DefaultContourDataset, DefaultHighLowDataset, DefaultWindDataset, DynamicTimeSeriesCollection, JDBCXYDataset, SubSeriesDataset, TimePeriodValuesCollection, TimeSeriesCollection, XYSeriesCollection

public interface XYDataset

extends SeriesDataset

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

Author:

David Gilbert

Method Summary

int	getItemCount(int series) Returns the number of items in a series.
java.lang.Number	getXValue(int series, int item) Returns the x-value for an item within a series.
java.lang.Number	getYValue(int series, int item) Returns the y-value for an item within a series.

Methods inherited from interface org.jfree.data.SeriesDataset

getSeriesCount, getSeriesName

Methods inherited from interface org.jfree.data.Dataset

addChangeListener, getGroup, removeChangeListener, setGroup

Method Detail

getItemCount

public int getItemCount(int series)

Returns the number of items in a series.

Parameters:

series - the series (zero-based index).

Returns:

the number of items within the series.

getXValue

public java.lang.Number getXValue(int series,
                                  int item)

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

The implementation is responsible for ensuring that the x-values are presented in ascending order.

Parameters:

series - the series (zero-based index).

item - the item (zero-based index).

Returns:

the x-value.

getYValue

public java.lang.Number getYValue(int series,
                                  int item)

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

Parameters:

series - the series (zero-based index).

item - the item (zero-based index).

Returns:

the y-value.