com.jnape.palatable.lambda.optics.lenses

Class HMapLens

java.lang.Object

com.jnape.palatable.lambda.optics.lenses.HMapLens

public final class HMapLens
extends Object

Lenses that operate on HMaps.

Method Summary

Modifier and Type	Method and Description
static <A> Lens.Simple<HMap,Maybe<A>>	valueAt(TypeSafeKey<?,A> key) A lens that focuses on a value at a TypeSafeKey.Simple<A> in an HMap, as a Maybe.

Methods inherited from class java.lang.Object

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

Method Detail

valueAt

public static <A> Lens.Simple<HMap,Maybe<A>> valueAt(TypeSafeKey<?,A> key)

A lens that focuses on a value at a TypeSafeKey.Simple<A> in an HMap, as a Maybe.

Type Parameters:

A - the value type at the key

Parameters:

key - the key

Returns:

the lens