Package org.djutils.event.collection

Class EventProducingMap<K,V>

java.lang.Object

org.djutils.event.LocalEventProducer

org.djutils.event.collection.EventProducingMap<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Map<K,V>, EventProducer

public class EventProducingMap<K,V>
extends LocalEventProducer
implements Map<K,V>

The Event producing map provides a map to which one can subscribe interest in entry changes. This class does not keep track of changes which take place indirectly. One is for example not notified on map.iterator.remove(). A listener must subscribe to the iterator, key set, etc. individually.

Copyright (c) 2002-2025 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://djutils.org. The DJUTILS project is distributed under a three-clause BSD-style license, which can be found at https://djutils.org/docs/license.html. This class was originally part of the DSOL project, see https://simulation.tudelft.nl/dsol/manual.

Author:

Peter Jacobs , Alexander Verbraeck

Nested Class Summary

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

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

Field Summary

Fields

Modifier and Type	Field	Description
static final EventType	OBJECT_ADDED_EVENT	OBJECT_ADDED_EVENT is fired on new entries.
static final EventType	OBJECT_CHANGED_EVENT	OBJECT_CHANGED_EVENT is fired on change of one or more entries.
static final EventType	OBJECT_REMOVED_EVENT	OBJECT_REMOVED_EVENT is fired on removal of entries.

Fields inherited from interface org.djutils.event.EventProducer

FIRST_POSITION, LAST_POSITION

Constructor Summary

Constructors

Constructor	Description
EventProducingMap(Map<K,V> wrappedMap)	constructs a new EventProducingMap.

Method Summary

Modifier and Type	Method	Description
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> map)
V	remove(Object key)
int	size()
Collection<V>	values()

Methods inherited from class org.djutils.event.LocalEventProducer

getEventListenerMap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.djutils.event.EventProducer

addListener, addListener, addListener, addListener, fireEvent, fireEvent, fireEvent, fireTimedEvent, fireTimedEvent, fireTimedEvent, fireUnverifiedEvent, fireUnverifiedEvent, fireUnverifiedTimedEvent, fireUnverifiedTimedEvent, getEventTypesWithListeners, getListenerReferences, hasListeners, numberOfListeners, removeAllListeners, removeAllListeners, removeListener

Methods inherited from interface java.util.Map

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

Field Details

OBJECT_ADDED_EVENT

public static final EventType OBJECT_ADDED_EVENT

OBJECT_ADDED_EVENT is fired on new entries.

OBJECT_REMOVED_EVENT

public static final EventType OBJECT_REMOVED_EVENT

OBJECT_REMOVED_EVENT is fired on removal of entries.

OBJECT_CHANGED_EVENT

public static final EventType OBJECT_CHANGED_EVENT

OBJECT_CHANGED_EVENT is fired on change of one or more entries.

Constructor Details

EventProducingMap

public EventProducingMap(Map<K,V> wrappedMap)

constructs a new EventProducingMap.

Parameters:

wrappedMap - the embedded map.

Method Details

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> map)

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>