public final class DataBufferObserverSet extends Object
implements DataBufferObserver DataBufferObserver.Observable

Utility class for managing a set of observers and distributing their notifications.

See Also

Public Constructor Summary

DataBufferObserverSet()

Public Method Summary

void
addObserver(DataBufferObserver observer)
Register the given observer for receiving change notifications.
void
clear()
Clears the set of observers.
boolean
hasObservers()
Returns true if this has any registered observers.
void
onDataChanged()
Called when the overall data changes.
void
onDataRangeChanged(int position, int count)
Called when a range of items changes.
void
onDataRangeInserted(int position, int count)
Called when a range of items is inserted.
void
onDataRangeMoved(int fromPosition, int toPosition, int count)
Called when a range of items is moved.
void
onDataRangeRemoved(int position, int count)
Called when a range of items is removed.
void
removeObserver(DataBufferObserver observer)
Unregister the given observer from receiving change notifications.

Inherited Method Summary

Public Constructors

public DataBufferObserverSet ()

Public Methods

public void addObserver (DataBufferObserver observer)

Register the given observer for receiving change notifications.

public void clear ()

Clears the set of observers.

public boolean hasObservers ()

Returns true if this has any registered observers.

public void onDataChanged ()

Called when the overall data changes.

public void onDataRangeChanged (int position, int count)

Called when a range of items changes.

public void onDataRangeInserted (int position, int count)

Called when a range of items is inserted.

public void onDataRangeMoved (int fromPosition, int toPosition, int count)

Called when a range of items is moved.

public void onDataRangeRemoved (int position, int count)

Called when a range of items is removed.

public void removeObserver (DataBufferObserver observer)

Unregister the given observer from receiving change notifications.