org.apache.wicket.util.collections

Class MicroMap<K,V>

java.lang.Object

org.apache.wicket.util.collections.MicroMap<K,V>

Type Parameters:

K - Key type

V - Value type

All Implemented Interfaces:

Serializable, Map<K,V>

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

An implementation of the java.util.Map interface which can only hold a single object. This is particularly useful to control memory usage in Wicket because many containers hold only a single component.

Author:

Jonathan Locke

See Also:

Serialized Form

Nested Class Summary

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

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_ENTRIES The maximum number of entries this map supports.

Constructor Summary

Constructors

Constructor and Description
MicroMap() Constructor
MicroMap(K key, V value) Constructs map with a single key and value pair.

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
boolean	isEmpty()
boolean	isFull()
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 java.lang.Object

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

Methods inherited from interface java.util.Map

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

Field Detail

MAX_ENTRIES

public static final int MAX_ENTRIES

The maximum number of entries this map supports.

See Also:

Constant Field Values

Constructor Detail

MicroMap

public MicroMap()

Constructor

MicroMap

public MicroMap(K key,
                V value)

Constructs map with a single key and value pair.

Parameters:

key - The key

value - The value

Method Detail

isFull

public boolean isFull()

Returns:

True if this MicroMap is full

size

public int size()

Specified by:

size in interface Map<K,V>

See Also:

Map.size()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

See Also:

Map.isEmpty()

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

See Also:

Map.containsKey(java.lang.Object)

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

See Also:

Map.containsValue(java.lang.Object)

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

See Also:

Map.get(java.lang.Object)

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

See Also:

Map.put(java.lang.Object, java.lang.Object)

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

See Also:

Map.remove(java.lang.Object)

putAll

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

Specified by:

putAll in interface Map<K,V>

See Also:

Map.putAll(java.util.Map)

clear

public void clear()

Specified by:

clear in interface Map<K,V>

See Also:

Map.clear()

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

See Also:

Map.keySet()

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

See Also:

Map.values()

entrySet

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

Specified by:

entrySet in interface Map<K,V>

See Also:

Map.entrySet()