Class MapPrism

java.lang.Object

com.jnape.palatable.lambda.optics.prisms.MapPrism

public final class MapPrism
extends Object

Prisms for Maps.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MapPrism()

Method Summary

Modifier and Type	Method	Description
static <M extends Map<K,V>, K, V> Prism<Map<K,V>,M,V,V>	valueAt(Fn1<Map<K,V>,M> copyFn, K k)	A Prism that focuses on the value at a key in a Map, and produces an instance of M on the way back out.
static <K,V> Prism.Simple<Map<K,V>,V>	valueAt(K k)	A Prism that focuses on the value at a key in a Map making no guarantees about the Map interface.

Methods inherited from class Object

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

Constructor Details

MapPrism

private MapPrism()

Method Details

valueAt

public static <M extends Map<K,V>, K, V>
Prism<Map<K,V>,M,V,V> valueAt(Fn1<Map<K,V>,M> copyFn,
 K k)

A Prism that focuses on the value at a key in a Map, and produces an instance of M on the way back out.

Type Parameters:

M - the Map subtype

K - the key type

V - the value type

Parameters:

copyFn - the copy function

k - the key to focus on

Returns:

the Prism

valueAt

public static <K,V> Prism.Simple<Map<K,V>,V> valueAt(K k)

A Prism that focuses on the value at a key in a Map making no guarantees about the Map interface.

Type Parameters:

K - the key type

V - the value type

Parameters:

k - the key to focus on

Returns:

the Prism