org.jfree.data
Class AbstractDataset

java.lang.Object
  |
  +--org.jfree.data.AbstractDataset

All Implemented Interfaces:

Dataset, java.io.Serializable

Direct Known Subclasses:

AbstractSeriesDataset, CategoryToPieDataset, DefaultCategoryDataset, DefaultContourDataset, DefaultKeyedValueDataset, DefaultMeterDataset, DefaultPieDataset, DefaultStatisticalCategoryDataset, DefaultValueDataset, JDBCXYDataset

public abstract class AbstractDataset

extends java.lang.Object

implements Dataset, java.io.Serializable

An abstract implementation of the Dataset interface, containing a mechanism for registering change listeners.

Author:

David Gilbert

See Also:

Serialized Form

Constructor Summary

protected

AbstractDataset() Constructs a dataset.

Method Summary

void	addChangeListener(DatasetChangeListener listener) Registers an object to receive notification of changes to the dataset.
protected void	fireDatasetChanged() Notifies all registered listeners that the dataset has changed.
DatasetGroup	getGroup() Returns the dataset group for the dataset.
protected void	notifyListeners(DatasetChangeEvent event) Notifies all registered listeners that the dataset has changed.
void	removeChangeListener(DatasetChangeListener listener) Deregisters an object so that it no longer receives notification of changes to the dataset.
void	setGroup(DatasetGroup group) Sets the dataset group for the dataset.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractDataset

protected AbstractDataset()

Constructs a dataset.

By default, the dataset is assigned to its own group.

Method Detail

getGroup

public DatasetGroup getGroup()

Returns the dataset group for the dataset.

Specified by:

getGroup in interface Dataset

Returns:

the dataset group.

setGroup

public void setGroup(DatasetGroup group)

Sets the dataset group for the dataset.

Specified by:

setGroup in interface Dataset

Parameters:

group - the dataset group.

addChangeListener

public void addChangeListener(DatasetChangeListener listener)

Registers an object to receive notification of changes to the dataset.

Specified by:

addChangeListener in interface Dataset

Parameters:

listener - the object to register.

removeChangeListener

public void removeChangeListener(DatasetChangeListener listener)

Deregisters an object so that it no longer receives notification of changes to the dataset.

Specified by:

removeChangeListener in interface Dataset

Parameters:

listener - the object to deregister.

fireDatasetChanged

protected void fireDatasetChanged()

Notifies all registered listeners that the dataset has changed.

notifyListeners

protected void notifyListeners(DatasetChangeEvent event)

Notifies all registered listeners that the dataset has changed.

Parameters:

event - contains information about the event that triggered the notification.