Package org.jfree.data.statistics

Class SimpleHistogramDataset

java.lang.Object

org.jfree.data.general.AbstractDataset

org.jfree.data.general.AbstractSeriesDataset

org.jfree.data.xy.AbstractXYDataset

org.jfree.data.xy.AbstractIntervalXYDataset

org.jfree.data.statistics.SimpleHistogramDataset

All Implemented Interfaces:

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

public class SimpleHistogramDataset
extends AbstractIntervalXYDataset
implements IntervalXYDataset, Cloneable, PublicCloneable, Serializable

A dataset used for creating simple histograms with custom defined bins.

See Also:

• HistogramDataset
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SimpleHistogramDataset(Comparable key)	Creates a new histogram dataset.

Method Summary

Modifier and Type	Method	Description
void	addBin(SimpleHistogramBin bin)	Adds a bin to the dataset.
void	addObservation(double value)	Adds an observation to the dataset (by incrementing the item count for the appropriate bin).
void	addObservation(double value, boolean notify)	Adds an observation to the dataset (by incrementing the item count for the appropriate bin).
void	addObservations(double[] values)	Adds a set of values to the dataset and sends a DatasetChangeEvent to all registered listeners.
void	clearObservations()	Removes all current observation data and sends a DatasetChangeEvent to all registered listeners.
Object	clone()	Returns a clone of the dataset.
boolean	equals(Object obj)	Compares the dataset for equality with an arbitrary object.
boolean	getAdjustForBinSize()	Returns a flag that controls whether or not the bin count is divided by the bin size in the getXValue(int, int) method.
DomainOrder	getDomainOrder()	Returns the order of the domain (or X) values returned by the dataset.
Number	getEndX(int series, int item)	Returns the ending X value for the specified series and item.
double	getEndXValue(int series, int item)	Returns the end x-value (as a double primitive) for an item within a series.
Number	getEndY(int series, int item)	Returns the ending Y value for the specified series and item.
double	getEndYValue(int series, int item)	Returns the end y-value (as a double primitive) for an item within a series.
int	getItemCount(int series)	Returns the number of items in a series.
int	getSeriesCount()	Returns the number of series in the dataset (always 1 for this 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.
double	getStartXValue(int series, int item)	Returns the start x-value (as a double primitive) for an item within a series.
Number	getStartY(int series, int item)	Returns the starting Y value for the specified series and item.
double	getStartYValue(int series, int item)	Returns the start y-value (as a double primitive) for an item within a series.
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 (as a double primitive) for an item within a series.
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.
void	removeAllBins()	Removes all bins and sends a DatasetChangeEvent to all registered listeners.
void	setAdjustForBinSize(boolean adjust)	Sets the flag that controls whether or not the bin count is divided by the bin size in the getYValue(int, int) method, and sends a DatasetChangeEvent to all registered listeners.

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

indexOf, seriesChanged

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

addChangeListener, canEqual, fireDatasetChanged, getGroup, getNotify, hashCode, hasListener, notifyListeners, removeChangeListener, setGroup, setNotify, validateObject

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

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

addChangeListener, getGroup, removeChangeListener, setGroup

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

indexOf

Constructor Details

SimpleHistogramDataset

public SimpleHistogramDataset(Comparable key)

Creates a new histogram dataset. Note that the adjustForBinSize flag defaults to true.

Parameters:

key - the series key (null not permitted).

Method Details

getAdjustForBinSize

public boolean getAdjustForBinSize()

Returns a flag that controls whether or not the bin count is divided by the bin size in the getXValue(int, int) method.

Returns:

A boolean.

See Also:

• setAdjustForBinSize(boolean)

setAdjustForBinSize

public void setAdjustForBinSize(boolean adjust)

Sets the flag that controls whether or not the bin count is divided by the bin size in the getYValue(int, int) method, and sends a DatasetChangeEvent to all registered listeners.

Parameters:

adjust - the flag.

See Also:

• getAdjustForBinSize()

getSeriesCount

public int getSeriesCount()

Returns the number of series in the dataset (always 1 for this dataset).

Specified by:

getSeriesCount in interface SeriesDataset

Specified by:

getSeriesCount in class AbstractSeriesDataset

Returns:

The series count.

getSeriesKey

public Comparable getSeriesKey(int series)

Returns the key for a series. Since this dataset only stores a single series, the series argument is ignored.

Specified by:

getSeriesKey in interface SeriesDataset

Specified by:

getSeriesKey in class AbstractSeriesDataset

Parameters:

series - the series (zero-based index, ignored in this dataset).

Returns:

The key for the series.

getDomainOrder

public DomainOrder getDomainOrder()

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

Specified by:

getDomainOrder in interface XYDataset

Overrides:

getDomainOrder in class AbstractXYDataset

Returns:

The order (never null).

getItemCount

public int getItemCount(int series)

Returns the number of items in a series. Since this dataset only stores a single series, the series argument is ignored.

Specified by:

getItemCount in interface XYDataset

Parameters:

series - the series index (zero-based, ignored in this dataset).

Returns:

The item count.

addBin

public void addBin(SimpleHistogramBin bin)

Adds a bin to the dataset. An exception is thrown if the bin overlaps with any existing bin in the dataset.

Parameters:

bin - the bin (null not permitted).

See Also:

• removeAllBins()

addObservation

public void addObservation(double value)

Adds an observation to the dataset (by incrementing the item count for the appropriate bin). A runtime exception is thrown if the value does not fit into any bin.

Parameters:

value - the value.

addObservation

public void addObservation(double value,
 boolean notify)

Adds an observation to the dataset (by incrementing the item count for the appropriate bin). A runtime exception is thrown if the value does not fit into any bin.

Parameters:

value - the value.

notify - send DatasetChangeEvent to listeners?

addObservations

public void addObservations(double[] values)

Adds a set of values to the dataset and sends a DatasetChangeEvent to all registered listeners.

Parameters:

values - the values (null not permitted).

See Also:

• clearObservations()

clearObservations

public void clearObservations()

Removes all current observation data and sends a DatasetChangeEvent to all registered listeners.

See Also:

• addObservations(double[])
• removeAllBins()

removeAllBins

public void removeAllBins()

Removes all bins and sends a DatasetChangeEvent to all registered listeners.

See Also:

• addBin(SimpleHistogramBin)

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 (never null).

getXValue

public double getXValue(int series,
 int item)

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

Specified by:

getXValue in interface XYDataset

Overrides:

getXValue in class AbstractXYDataset

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).

getYValue

public double getYValue(int series,
 int item)

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

Specified by:

getYValue in interface XYDataset

Overrides:

getYValue in class AbstractXYDataset

Parameters:

series - the series index (zero-based).

item - the item index (zero-based).

Returns:

The y-value.

See Also:

• getAdjustForBinSize()

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.

getStartXValue

public double getStartXValue(int series,
 int item)

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

Specified by:

getStartXValue in interface IntervalXYDataset

Overrides:

getStartXValue in class AbstractIntervalXYDataset

Parameters:

series - the series (zero-based index).

item - the item (zero-based index).

Returns:

The start x-value.

See Also:

• IntervalXYDataset.getStartX(int, int)

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.

getEndXValue

public double getEndXValue(int series,
 int item)

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

Specified by:

getEndXValue in interface IntervalXYDataset

Overrides:

getEndXValue in class AbstractIntervalXYDataset

Parameters:

series - the series index (zero-based).

item - the item index (zero-based).

Returns:

The end x-value.

See Also:

• IntervalXYDataset.getEndX(int, int)

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.

getStartYValue

public double getStartYValue(int series,
 int item)

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

Specified by:

getStartYValue in interface IntervalXYDataset

Overrides:

getStartYValue in class AbstractIntervalXYDataset

Parameters:

series - the series index (zero-based).

item - the item index (zero-based).

Returns:

The start y-value.

See Also:

• IntervalXYDataset.getStartY(int, int)

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.

getEndYValue

public double getEndYValue(int series,
 int item)

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

Specified by:

getEndYValue in interface IntervalXYDataset

Overrides:

getEndYValue in class AbstractIntervalXYDataset

Parameters:

series - the series index (zero-based).

item - the item index (zero-based).

Returns:

The end y-value.

See Also:

• IntervalXYDataset.getEndY(int, int)

equals

public boolean equals(Object obj)

Compares the dataset for equality with an arbitrary object.

Overrides:

equals in class AbstractDataset

Parameters:

obj - the object (null permitted).

Returns:

A boolean.

clone

public Object clone()
             throws CloneNotSupportedException

Returns a clone of the dataset.

Specified by:

clone in interface PublicCloneable

Overrides:

clone in class AbstractDataset

Returns:

A clone.

Throws:

CloneNotSupportedException - not thrown by this class, but maybe by subclasses (if any).