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 java.lang.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