PersistentMap (Apache Jena Base)

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 Known Implementing Classes:

PMap
```
public interface PersistentMap<K,V,SelfType extends PersistentMap<K,V,SelfType>>
```
A persistent map data structure.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`java.util.Map<K,V>`	`asMap()`	An immutable view of this as a `Map`.
`default boolean`	`containsKey(K key)`
`java.util.stream.Stream<java.util.Map.Entry<K,V>>`	`entryStream()`
`default <R> java.util.stream.Stream<R>`	`flatten(java.util.function.BiFunction<K,V,java.util.stream.Stream<R>> f)`	Sends this map's entries through a flattening function.
`default java.util.Optional<V>`	`get(K key)`
`SelfType`	`minus(K key)`
`SelfType`	`plus(K key, V value)`

- Method Detail
  - get
```
default java.util.Optional<V> get(K key)
```
    Parameters:
    
    key -
    
    Returns:
    
    the value indexed by key if it exists
  - plus
```
SelfType plus(K key,
              V value)
```
    Parameters:
    
    key -
    
    value -
    
    Returns:
    
    a new SelfType with a new mapping from key to value
  - minus
```
SelfType minus(K key)
```
    Parameters:
    
    key -
    
    Returns:
    
    a new SelfType without the mapping indexed by key
  - containsKey
```
default boolean containsKey(K key)
```
    Parameters:
    
    key -
    
    Returns:
    
    whether this map contains an entry indexed by key
  - entryStream
```
java.util.stream.Stream<java.util.Map.Entry<K,V>> entryStream()
```
    Returns:
    
    a Stream of map entries
  - flatten
```
default <R> java.util.stream.Stream<R> flatten(java.util.function.BiFunction<K,V,java.util.stream.Stream<R>> f)
```
    Sends this map's entries through a flattening function.
    
    Parameters:
    
    f - a function that flattens one entry into a stream
    
    Returns:
    
    a stream of flattened entries
  - asMap
```
java.util.Map<K,V> asMap()
```
    An immutable view of this as a Map.