Package ball.util

Class MapView<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

ball.util.MapView<K,V>

Type Parameters:

K - The key type.

V - The value type.

All Implemented Interfaces:

Serializable, Map<K,V>

Direct Known Subclasses:

CoordinateMap

public class MapView<K,V>
extends AbstractMap<K,V>
implements Serializable

Map implementation base class to provide a view of a wrapped Map. Subclass designers should override entrySet() first. All implemented methods simply pass the call to the wrapped Map (all other methods are implemented by AbstractMap).

Author:

Allen D. Ball

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	MapView.EntrySet	entrySet implementation class.

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

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
protected MapView.EntrySet	entrySet

Constructor Summary

Constructors

Constructor	Description
MapView(Map<K,V> map)	Sole constructor.

Method Summary

Modifier and Type	Method	Description
void	clear()
Set<Map.Entry<K,V>>	entrySet()	Method returns a single Set backed by map().
V	get(Object key)
protected Map<K,V>	map()
V	put(K key, V value)
V	remove(Object key)

Methods inherited from class java.util.AbstractMap

clone, containsKey, containsValue, equals, hashCode, isEmpty, keySet, putAll, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

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

Field Detail

entrySet

protected final MapView.EntrySet entrySet

Constructor Detail

MapView

public MapView(Map<K,V> map)

Sole constructor.

Parameters:

map - The Map.

Method Detail

map

protected Map<K,V> map()

Returns:

The "wrapped" Map.

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class AbstractMap<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class AbstractMap<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMap<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class AbstractMap<K,V>

entrySet

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

Method returns a single Set backed by map(). Subclass implementations should update entrySet.

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>

Returns:

entrySet