net.sourceforge.java.feednread.backend.model.adressbar
Class NewsFeedAddressBarContentProvider

java.lang.Object
  net.sourceforge.java.feednread.backend.model.adressbar.NewsFeedAddressBarContentProvider

All Implemented Interfaces:

IContentProvider, IStructuredContentProvider

public class NewsFeedAddressBarContentProvider

extends Object

implements IStructuredContentProvider

Supplies a JFace ComboViewer instance with address data.

Author:

Sebastian Machhausen

Field Summary

private List	addressList The internal address List
private ComboViewer	viewer The ComboViewer that this content provider supplies its data to

Constructor Summary

NewsFeedAddressBarContentProvider(ComboViewer viewer)
Creates a new NewsFeedAddresBarContentProvider for the specified ComboViewer.

Method Summary

void	add(String url) Adds the specified url to this NewsFeedAddressBarContentProvider.
void	dispose() Disposes of this content provider.
Object[]	getElements(Object inputElement) Returns the elements to display in the viewer when its input is set to the given element.
void	inputChanged(Viewer viewer, Object oldInput, Object newInput) Notifies this content provider that the given viewer's input has been switched to a different element.
void	persist() Persists the addresses managed by this NewsFeedAddressBarContentProvider to the default File as specified by ConfigurationManager.DEFAULT_NEWSFEED_ADDRESS_BAR_FILE.
void	remove(String url) Removes the specified url from this NewsFeedAddressBarContentProvider.
void	removeAll() Removes all addresses from this NewsFeedAddressBarContentProvider.
private void	restore() Restores the addresses managed by this NewsFeedAddressBarContentProvider from the default File as specified by ConfigurationManager.DEFAULT_NEWSFEED_ADDRESS_BAR_FILE.

Methods inherited from class java.lang.Object

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

Field Detail

viewer

private ComboViewer viewer

The ComboViewer that this content provider supplies its data to

addressList

private List addressList

The internal address List

Constructor Detail

NewsFeedAddressBarContentProvider

public NewsFeedAddressBarContentProvider(ComboViewer viewer)

Creates a new NewsFeedAddresBarContentProvider for the specified ComboViewer.

Parameters:

viewer - the ComboViewer that this content provider supplies its data to

Method Detail

getElements

public Object[] getElements(Object inputElement)

Returns the elements to display in the viewer when its input is set to the given element. These elements can be presented as rows in a table, items in a list, etc. The result is not modified by the viewer.

Specified by:

getElements in interface IStructuredContentProvider

Parameters:

inputElement - the input element

Returns:

the array of elements to display in the viewer

dispose

public void dispose()

Disposes of this content provider. This is called by the viewer when it is disposed. The viewer should not be updated during this call, as it is in the process of being disposed.

Specified by:

dispose in interface IContentProvider

inputChanged

public void inputChanged(Viewer viewer,
                         Object oldInput,
                         Object newInput)

Notifies this content provider that the given viewer's input has been switched to a different element. A typical use for this method is registering the content provider as a listener to changes on the new input (using model-specific means), and deregistering the viewer from the old input. In response to these change notifications, the content provider should update the viewer (see the add, remove, update and refresh methods on the viewers). The viewer should not be updated during this call, as it might be in the process of being disposed.

Specified by:

inputChanged in interface IContentProvider

Parameters:

viewer - the viewer

oldInput - the old input element, or null if the viewer did not previously have an input

newInput - the new input element, or null if the viewer does not have an input

add

public void add(String url)

Adds the specified url to this NewsFeedAddressBarContentProvider. Prevents duplicates from being added.

Parameters:

url - the url to add

remove

public void remove(String url)

Removes the specified url from this NewsFeedAddressBarContentProvider.

Parameters:

url - the url to remove

removeAll

public void removeAll()

Removes all addresses from this NewsFeedAddressBarContentProvider.

restore

private void restore()

Restores the addresses managed by this NewsFeedAddressBarContentProvider from the default File as specified by ConfigurationManager.DEFAULT_NEWSFEED_ADDRESS_BAR_FILE.

See Also:

persist()

persist

public void persist()

Persists the addresses managed by this NewsFeedAddressBarContentProvider to the default File as specified by ConfigurationManager.DEFAULT_NEWSFEED_ADDRESS_BAR_FILE.

See Also:

restore()