cz.cuni.amis.utils.maps
Class LazyMap<K,V>

java.lang.Object
  cz.cuni.amis.utils.maps.LazyMap<K,V>

All Implemented Interfaces:

Map<K,V>

public abstract class LazyMap<K,V>
extends Object
implements Map<K,V>

Maps whose items are initialized on demand by create(K) method.

Author:

ik

Nested Class Summary

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

Map.Entry<K,V>

Constructor Summary

LazyMap()

LazyMap(Map<K,V> baseMap)

Method Summary

void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
protected abstract V	create(K key) Creates value for given key.
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)
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

equals, hashCode

Constructor Detail

LazyMap

public LazyMap()

LazyMap

public LazyMap(Map<K,V> baseMap)

Method Detail

create

protected abstract V create(K key)

Creates value for given key.

Parameters:

key -

Returns:

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>