com.ijchart.xychart.dataset
Class AbstractDataset

java.lang.Object
  com.ijchart.xychart.dataset.AbstractDataset

All Implemented Interfaces:

IDataset, IDatasetChangeListener, java.io.Serializable, java.lang.Cloneable, java.util.EventListener

Direct Known Subclasses:

DefaultKeyValueDataset, DefaultMatrixDataset, SlidingDataset

public abstract class AbstractDataset
extends java.lang.Object
implements IDataset, IDatasetChangeListener, java.lang.Cloneable, java.io.Serializable

Title: IJChart

Description: a chart library for the Java(tm) platform.

The abstract implemention of dataset,concrete dataset class can extend this class.

Copyright: Copyright (c) 2013

Company:

Version:

1.0

Author:

zhang feng min,shanghai china. Contract me by email.

See Also:

Serialized Form

Constructor Summary

protected

AbstractDataset() No argument constructor.

Method Summary

void	addChangeListener(IDatasetChangeListener listener) Registers an object for notification of changes to the dataset.
java.lang.Object	clone() Returns a clone of the dataset.
void	datasetChanged(DatasetChangeEvent event) If the data object of dataset changed by method out of dataset,set dataset changed by this method.
boolean	equals(java.lang.Object obj) Override equals method.
protected void	fireDatasetChanged() Notifies all registered listeners that the dataset has changed.
void	forceDataSetChanged() If the data object of dataset changed by method out of dataset,set dataset changed by this method.
int	hashCode() Get hascode.
boolean	hasListener(IDatasetChangeListener listener) Returns true if the specified object is registered with the dataset as a listener.
protected void	notifyListeners(DatasetChangeEvent event) Notifies all registered listeners that the dataset has changed.
void	removeAllChangeListener() Deregisters all object for notification of changes to the dataset.
void	removeChangeListener(IDatasetChangeListener listener) Deregisters an object for notification of changes to the dataset.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.ijchart.xychart.dataset.IDataset

isThisDataType

Constructor Detail

AbstractDataset

protected AbstractDataset()

No argument constructor.

Method Detail

addChangeListener

public void addChangeListener(IDatasetChangeListener listener)

Registers an object for notification of changes to the dataset.

Specified by:

addChangeListener in interface IDataset

Parameters:

listener - the object to register.

removeChangeListener

public void removeChangeListener(IDatasetChangeListener listener)

Deregisters an object for notification of changes to the dataset.

Specified by:

removeChangeListener in interface IDataset

Parameters:

listener - the object to deregister.

removeAllChangeListener

public void removeAllChangeListener()

Deregisters all object for notification of changes to the dataset.

Specified by:

removeAllChangeListener in interface IDataset

hasListener

public boolean hasListener(IDatasetChangeListener listener)

Returns true if the specified object is registered with the dataset as a listener. Most applications won't need to call this method, it exists mainly for use by unit testing code.

Parameters:

listener - the listener.

Returns:

A boolean.

forceDataSetChanged

public void forceDataSetChanged()

If the data object of dataset changed by method out of dataset,set dataset changed by this method.

Specified by:

forceDataSetChanged in interface IDataset

datasetChanged

public void datasetChanged(DatasetChangeEvent event)

If the data object of dataset changed by method out of dataset,set dataset changed by this method.

Specified by:

datasetChanged in interface IDatasetChangeListener

Parameters:

event - information about the event.

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.

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Returns a clone of the dataset. The cloned dataset will NOT include the IDatasetChangeListener references that have been registered with this dataset.

Overrides:

clone in class java.lang.Object

Returns:

A clone.

Throws:

java.lang.CloneNotSupportedException - if the dataset does not support cloning.

equals

public boolean equals(java.lang.Object obj)

Override equals method.

Overrides:

equals in class java.lang.Object

Parameters:

obj - Object

Returns:

boolean

hashCode

public int hashCode()

Get hascode.

Overrides:

hashCode in class java.lang.Object

Returns:

int