Package com.oorian.data

Class AbstractDataProvider<T>

java.lang.Object

com.oorian.data.AbstractDataProvider<T>

Type Parameters:

T - the data item type

All Implemented Interfaces:

DataProvider<T>

Direct Known Subclasses:

CallbackDataProvider, ListDataProvider

public abstract class AbstractDataProvider<T>
extends Object
implements DataProvider<T>

Base implementation of DataProvider with listener management.

Handles registration and notification of DataChangeListener instances. Subclasses only need to implement DataProvider.fetch(Query) and DataProvider.size(Query).

Since:

2.1

Version:

1.0

Author:

Marvin P. Warble Jr.

See Also:

• ListDataProvider
• CallbackDataProvider

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractDataProvider()	Creates a new abstract data provider.

Method Summary

Modifier and Type	Method	Description
void	addDataChangeListener(DataChangeListener listener)	Registers a listener to be notified when the data changes.
void	refresh()	Notifies all registered listeners that the data has changed.
void	removeDataChangeListener(DataChangeListener listener)	Removes a previously registered data change listener.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.oorian.data.DataProvider

fetch, size

Constructor Details

AbstractDataProvider

protected AbstractDataProvider()

Creates a new abstract data provider.

Method Details

addDataChangeListener

public void addDataChangeListener(DataChangeListener listener)

Description copied from interface: DataProvider

Registers a listener to be notified when the data changes.

Specified by:

addDataChangeListener in interface DataProvider<T>

Parameters:

listener - the listener to add

removeDataChangeListener

public void removeDataChangeListener(DataChangeListener listener)

Description copied from interface: DataProvider

Removes a previously registered data change listener.

Specified by:

removeDataChangeListener in interface DataProvider<T>

Parameters:

listener - the listener to remove

refresh

public void refresh()

Description copied from interface: DataProvider

Notifies all registered listeners that the data has changed.

Call this after modifying the underlying data source to trigger UI components to refresh their display.

Specified by:

refresh in interface DataProvider<T>