Package com.norconex.commons.lang.map

Class ObservableMap<K,V>

java.lang.Object

com.norconex.commons.lang.map.ObservableMap<K,V>

Type Parameters:

K - the type of keys maintained by the map we are observing

V - the type of mapped values

All Implemented Interfaces:

Serializable, Map<K,V>

Direct Known Subclasses:

Properties

public class ObservableMap<K,V>
extends Object
implements Map<K,V>, Serializable

A map implementation that reports changes to added IMapChangeListener instance. Changes are triggered when a value change is detected in the following method calls: put(Object, Object), putAll(Map), remove(Object), and clear(). This class will not detect changes made to key or value objects modified outside this class. This class can be used as a decorator to other Map implementations.

Since:

1.4

Author:

Pascal Essiembre

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
ObservableMap()
ObservableMap(Map<K,V> map)	Decorates map argument as an ObservableMap.

Method Summary

Modifier and Type	Method	Description
void	addMapChangeListener(IMapChangeListener<K,V> listener)	Adds a map change listener.
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	remove(Object key)
void	removeMapChangeListener(IMapChangeListener<K,V> listener)	Removes a map change listener.
int	size()
String	toString()
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Details

ObservableMap

public ObservableMap()

ObservableMap

public ObservableMap(Map<K,V> map)

Decorates map argument as an ObservableMap.

Parameters:

map - the Map to decorate

Method Details

addMapChangeListener

public void addMapChangeListener(IMapChangeListener<K,V> listener)

Adds a map change listener.

Parameters:

listener - change listener

removeMapChangeListener

public void removeMapChangeListener(IMapChangeListener<K,V> listener)

Removes a map change listener.

Parameters:

listener - change listener

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> m)

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

toString

public String toString()

Overrides:

toString in class Object