org.apache.jena.atlas.lib.persistent

Class PMap<K,V,SelfType extends PMap<K,V,SelfType>>

java.lang.Object

org.apache.jena.atlas.lib.persistent.PMap<K,V,SelfType>

Type Parameters:

K - the type of keys in the map

V - the type of values in this map

SelfType - the self-type of implementing classes

All Implemented Interfaces:

PersistentMap<K,V,SelfType>

public abstract class PMap<K,V,SelfType extends PMap<K,V,SelfType>>
extends Object
implements PersistentMap<K,V,SelfType>

An implementation of PersistentMap using Map.

Method Summary

Modifier and Type	Method and Description
Map<K,V>	asMap() An immutable view of this as a Map.
boolean	containsKey(K key)
Stream<Map.Entry<K,V>>	entryStream()
Optional<V>	get(K key)
SelfType	minus(K key)
SelfType	plus(K key, V value)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.atlas.lib.persistent.PersistentMap

flatten

Method Detail

asMap

public Map<K,V> asMap()

Description copied from interface: PersistentMap

An immutable view of this as a Map.

Specified by:

asMap in interface PersistentMap<K,V,SelfType extends PMap<K,V,SelfType>>

plus

public SelfType plus(K key,
                     V value)

Specified by:

plus in interface PersistentMap<K,V,SelfType extends PMap<K,V,SelfType>>

Returns:

a new SelfType with a new mapping from key to value

minus

public SelfType minus(K key)

Specified by:

minus in interface PersistentMap<K,V,SelfType extends PMap<K,V,SelfType>>

Returns:

a new SelfType without the mapping indexed by key

get

public Optional<V> get(K key)

Specified by:

get in interface PersistentMap<K,V,SelfType extends PMap<K,V,SelfType>>

Returns:

the value indexed by key if it exists

containsKey

public boolean containsKey(K key)

Specified by:

containsKey in interface PersistentMap<K,V,SelfType extends PMap<K,V,SelfType>>

Returns:

whether this map contains an entry indexed by key

entryStream

public Stream<Map.Entry<K,V>> entryStream()

Specified by:

entryStream in interface PersistentMap<K,V,SelfType extends PMap<K,V,SelfType>>

Returns:

a Stream of map entries