com.clarkparsia.pellet.utils

Class DeltaMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

com.clarkparsia.pellet.utils.DeltaMap<K,V>

All Implemented Interfaces:

Map<K,V>

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

A mutable map implementation that is view over a map that is not modified. The additions and removals to the base map are tracked internally and all the map functions operate as if the changes have been applied to base map. Updating the base map outside this class will have undefined consequences.

Author:

Evren Sirin

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

Constructors

Constructor and Description
DeltaMap(Map<K,V> base) Creates a DeltaMap with the given base map.

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
Map<K,V>	getAdditions() Returns the additions that have been applied to this map.
Map<K,V>	getRemovals() Returns the removals that have been applied to this map.
V	put(K key, V value)
V	remove(Object e)
void	reset() Clears all the changes tracked resetting the contents of this map to the base map.
int	size()

Methods inherited from class java.util.AbstractMap

clone, containsValue, equals, hashCode, isEmpty, keySet, putAll, 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

Constructor Detail

DeltaMap

public DeltaMap(Map<K,V> base)

Creates a DeltaMap with the given base map.

Method Detail

reset

public void reset()

Clears all the changes tracked resetting the contents of this map to the base map.

getAdditions

public Map<K,V> getAdditions()

Returns the additions that have been applied to this map.

getRemovals

public Map<K,V> getRemovals()

Returns the removals that have been applied to this map. Only the removals that are in the base map are tracked.

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class AbstractMap<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

Overrides:

containsKey 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>

remove

public V remove(Object e)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMap<K,V>

entrySet

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

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class AbstractMap<K,V>