org.openstreetmap.josm.data.osm.event

Class DatasetEventManager

java.lang.Object

org.openstreetmap.josm.data.osm.event.DatasetEventManager

All Implemented Interfaces:

DataSetListenerAdapter.Listener, MapView.EditLayerChangeListener

public class DatasetEventManager
extends java.lang.Object
implements MapView.EditLayerChangeListener, DataSetListenerAdapter.Listener

This class allows to add DatasetListener to currently active dataset. If active layer is changed, listeners are automatically registered at new active dataset (it's no longer necessary to register for layer events and reregister every time new layer is selected) Events in EDT are supported, see addDatasetListener(DataSetListener, FireMode)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	DatasetEventManager.EdtRunnable
static class	DatasetEventManager.FireMode
private static class	DatasetEventManager.ListenerInfo

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Runnable	edtRunnable
private java.util.Queue<AbstractDatasetChangedEvent>	eventsInEDT
private java.util.concurrent.CopyOnWriteArrayList<DatasetEventManager.ListenerInfo>	inEDTListeners
private static DatasetEventManager	instance
private DataSetListener	myListener
private java.util.concurrent.CopyOnWriteArrayList<DatasetEventManager.ListenerInfo>	normalListeners

Constructor Summary

Constructors

Constructor and Description
DatasetEventManager() Constructs a new DatasetEventManager.

Method Summary

Modifier and Type	Method and Description
void	addDatasetListener(DataSetListener listener, DatasetEventManager.FireMode fireMode) Register listener, that will receive events from currently active dataset
void	editLayerChanged(OsmDataLayer oldLayer, OsmDataLayer newLayer) Called after the active edit layer was changed.
private void	fireConsolidatedEvents(java.util.List<DatasetEventManager.ListenerInfo> listeners, AbstractDatasetChangedEvent event)
private void	fireEvents(java.util.List<DatasetEventManager.ListenerInfo> listeners, AbstractDatasetChangedEvent event)
static DatasetEventManager	getInstance() Replies the unique instance.
void	processDatasetEvent(AbstractDatasetChangedEvent event)
void	removeDatasetListener(DataSetListener listener)

Methods inherited from class java.lang.Object

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

Field Detail

instance

private static final DatasetEventManager instance

eventsInEDT

private final java.util.Queue<AbstractDatasetChangedEvent> eventsInEDT

inEDTListeners

private final java.util.concurrent.CopyOnWriteArrayList<DatasetEventManager.ListenerInfo> inEDTListeners

normalListeners

private final java.util.concurrent.CopyOnWriteArrayList<DatasetEventManager.ListenerInfo> normalListeners

myListener

private final DataSetListener myListener

edtRunnable

private final java.lang.Runnable edtRunnable

Constructor Detail

DatasetEventManager

public DatasetEventManager()

Constructs a new DatasetEventManager.

Method Detail

getInstance

public static DatasetEventManager getInstance()

Replies the unique instance.

Returns:

the unique instance

addDatasetListener

public void addDatasetListener(DataSetListener listener,
                               DatasetEventManager.FireMode fireMode)

Register listener, that will receive events from currently active dataset

Parameters:

listener - the listener to be registered

fireMode - If DatasetEventManager.FireMode.IN_EDT or DatasetEventManager.FireMode.IN_EDT_CONSOLIDATED, listener will be notified in event dispatch thread instead of thread that caused the dataset change

removeDatasetListener

public void removeDatasetListener(DataSetListener listener)

editLayerChanged

public void editLayerChanged(OsmDataLayer oldLayer,
                             OsmDataLayer newLayer)

Description copied from interface: MapView.EditLayerChangeListener

Called after the active edit layer was changed.

Specified by:

editLayerChanged in interface MapView.EditLayerChangeListener

Parameters:

oldLayer - The old edit layer

newLayer - The current (new) edit layer

fireEvents

private void fireEvents(java.util.List<DatasetEventManager.ListenerInfo> listeners,
                        AbstractDatasetChangedEvent event)

fireConsolidatedEvents

private void fireConsolidatedEvents(java.util.List<DatasetEventManager.ListenerInfo> listeners,
                                    AbstractDatasetChangedEvent event)

processDatasetEvent

public void processDatasetEvent(AbstractDatasetChangedEvent event)

Specified by:

processDatasetEvent in interface DataSetListenerAdapter.Listener