gov.llnl.ontology.util
Class ExtendedMap<K,V>

java.lang.Object
  java.util.AbstractMap<K,V>
      gov.llnl.ontology.util.ExtendedMap<K,V>

All Implemented Interfaces:

Map<K,V>

public class ExtendedMap<K,V>
extends AbstractMap<K,V>

A Map that extends an existing map without modifying the underlying map. Given an existing Map, this class will provide read only access to the elements in the Map and store all new key, value pairs in a new internal Map.

This class is extremely useful for when several different maps need to share a set of mappings provided by a base map, but duplicate copies of the map cannot be created, due to memory constraints.

Author:

Keith Stevens

Nested Class Summary

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

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

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

Map.Entry<K,V>

Constructor Summary

ExtendedMap(Map<K,V> baseMap)
Creates a new ExtendedMap that wraps the given Map.

Method Summary

Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
V	put(K key, V value)

Methods inherited from class java.util.AbstractMap

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtendedMap

public ExtendedMap(Map<K,V> baseMap)

Creates a new ExtendedMap that wraps the given Map. All new mappings will be stored in a new map so that baseMap is never modified.

Method Detail

entrySet

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

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>

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>