com.acsinet_solutions.util.adt
Class LazyMap<K,V>

java.lang.Object
  com.acsinet_solutions.util.adt.MapDelegator<K,V>
      com.acsinet_solutions.util.adt.LazyMap<K,V>

All Implemented Interfaces:

java.util.Map<K,V>

public class LazyMap<K,V>
extends MapDelegator<K,V>

This implements a map that delegates to a lazy loaded implementation. Jakarta commons collections also offers a lazy map but on a key basis; this one is different because it loads lazily the entire map on one step.

A lazy object implementation based on dynamic proxies may also be created if needed.

Author:

Santiago Arriaga

Nested Class Summary

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

java.util.Map.Entry<K,V>

Constructor Summary

LazyMap(ObjectFactory<java.util.Map<K,V>> factory)
Create a new lazy map with a reference to the object factory that will create the actual map.

Method Summary

void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
V	get(java.lang.Object key)
boolean	isEmpty()
java.util.Set<K>	keySet()
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> map)
V	remove(java.lang.Object key)
void	reset() Mark the lazy map as not loaded, so before the next operation a reload operation of the data must be performed.
int	size()
java.util.Collection<V>	values()

Methods inherited from class com.acsinet_solutions.util.adt.MapDelegator

getCurrent, setCurrent

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(ObjectFactory<java.util.Map<K,V>> factory)

Create a new lazy map with a reference to the object factory that will create the actual map.

Method Detail

clear

public void clear()

Specified by:

clear in interface java.util.Map<K,V>

Overrides:

clear in class MapDelegator<K,V>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<K,V>

Overrides:

containsKey in class MapDelegator<K,V>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<K,V>

Overrides:

containsValue in class MapDelegator<K,V>

entrySet

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

Specified by:

entrySet in interface java.util.Map<K,V>

Overrides:

entrySet in class MapDelegator<K,V>

get

public V get(java.lang.Object key)

Specified by:

get in interface java.util.Map<K,V>

Overrides:

get in class MapDelegator<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,V>

Overrides:

isEmpty in class MapDelegator<K,V>

keySet

public java.util.Set<K> keySet()

Specified by:

keySet in interface java.util.Map<K,V>

Overrides:

keySet in class MapDelegator<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface java.util.Map<K,V>

Overrides:

put in class MapDelegator<K,V>

putAll

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

Specified by:

putAll in interface java.util.Map<K,V>

Overrides:

putAll in class MapDelegator<K,V>

remove

public V remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<K,V>

Overrides:

remove in class MapDelegator<K,V>

size

public int size()

Specified by:

size in interface java.util.Map<K,V>

Overrides:

size in class MapDelegator<K,V>

values

public java.util.Collection<V> values()

Specified by:

values in interface java.util.Map<K,V>

Overrides:

values in class MapDelegator<K,V>

reset

public final void reset()

Mark the lazy map as not loaded, so before the next operation a reload operation of the data must be performed.