org.openstreetmap.josm.data.osm
Class ChangesetCache

java.lang.Object
  org.openstreetmap.josm.data.osm.ChangesetCache

All Implemented Interfaces:

Preferences.PreferenceChangedListener

public class ChangesetCache
extends java.lang.Object
implements Preferences.PreferenceChangedListener

ChangesetCache is global in-memory cache for changesets downloaded from an OSM API server. The unique instance is available as singleton, see getInstance(). Clients interested in cache updates can register for ChangesetCacheEvents using addChangesetCacheListener(ChangesetCacheListener). They can use removeChangesetCacheListener(ChangesetCacheListener) to unregister as cache event listener. The cache itself listens to java.util.prefs.PreferenceChangeEvents. It clears itself if the OSM API URL is changed in the preferences. ChangesetCacheEvents are delivered on the EDT.

Field Summary

private java.util.Map<java.lang.Integer,Changeset>	cache the cached changesets
private static ChangesetCache	instance the unique instance
private java.util.concurrent.CopyOnWriteArrayList<ChangesetCacheListener>	listeners

Constructor Summary

private

ChangesetCache()

Method Summary

void	addChangesetCacheListener(ChangesetCacheListener listener)
void	clear()
boolean	contains(Changeset cs)
boolean	contains(int id)
protected void	fireChangesetCacheEvent(ChangesetCacheEvent e)
Changeset	get(int id)
java.util.Set<Changeset>	getChangesets()
static ChangesetCache	getInstance() Replies the unique instance of the cache
java.util.List<Changeset>	getOpenChangesets()
void	preferenceChanged(Preferences.PreferenceChangeEvent e)
void	remove(Changeset cs)
void	remove(java.util.Collection<Changeset> changesets) Removes the changesets in changesets from the cache.
void	remove(int id)
protected void	remove(int id, DefaultChangesetCacheEvent e)
void	removeChangesetCacheListener(ChangesetCacheListener listener)
int	size()
void	update(Changeset cs)
protected void	update(Changeset cs, DefaultChangesetCacheEvent e)
void	update(java.util.Collection<Changeset> changesets)

Methods inherited from class java.lang.Object

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

Field Detail

instance

private static final ChangesetCache instance

the unique instance

cache

private final java.util.Map<java.lang.Integer,Changeset> cache

the cached changesets

listeners

private final java.util.concurrent.CopyOnWriteArrayList<ChangesetCacheListener> listeners

Constructor Detail

ChangesetCache

private ChangesetCache()

Method Detail

getInstance

public static ChangesetCache getInstance()

Replies the unique instance of the cache

Returns:

the unique instance of the cache

addChangesetCacheListener

public void addChangesetCacheListener(ChangesetCacheListener listener)

removeChangesetCacheListener

public void removeChangesetCacheListener(ChangesetCacheListener listener)

fireChangesetCacheEvent

protected void fireChangesetCacheEvent(ChangesetCacheEvent e)

update

protected void update(Changeset cs,
                      DefaultChangesetCacheEvent e)

update

public void update(Changeset cs)

update

public void update(java.util.Collection<Changeset> changesets)

contains

public boolean contains(int id)

contains

public boolean contains(Changeset cs)

get

public Changeset get(int id)

getChangesets

public java.util.Set<Changeset> getChangesets()

remove

protected void remove(int id,
                      DefaultChangesetCacheEvent e)

remove

public void remove(int id)

remove

public void remove(Changeset cs)

remove

public void remove(java.util.Collection<Changeset> changesets)

Removes the changesets in changesets from the cache. A ChangesetCacheEvent is fired.

Parameters:

changesets - the changesets to remove. Ignored if null.

size

public int size()

clear

public void clear()

getOpenChangesets

public java.util.List<Changeset> getOpenChangesets()

preferenceChanged

public void preferenceChanged(Preferences.PreferenceChangeEvent e)

Specified by:

preferenceChanged in interface Preferences.PreferenceChangedListener