Lens

open class Lens<in IN : Any, out FINAL>(val meta: Meta, lensGet: (IN) -> FINAL) : LensExtractor<IN, FINAL> , Iterable<Meta>

A Lens provides the uni-directional extraction of an entity from a target.

Inheritors

BiDiLens

PathLens

Constructors

Lens

constructor(meta: Meta, lensGet: (IN) -> FINAL)

Properties

Functions

and

fun Events.and(next: Events): Events

asResult

fun <IN, OUT> LensExtractor<IN, OUT>.asResult(): LensExtractor<IN, Result<OUT, LensFailure>>

Convert the result of a lens extraction to a Result4k type which

asRouter

fun (Request) -> Boolean.asRouter(description: String = unavailable.description): Router

Convert any predicate on a request into a router

asServer

fun HttpHandler.asServer(config: ServerConfig): Http4kServer

asServlet

fun HttpHandler.asServlet(): HttpHandlerServlet

debug

fun HttpHandler.debug(out: PrintStream = System.out, debugStream: Boolean = false): (request: Request) -> Response

extract

open fun extract(target: IN): FINAL

Lens operation to get the value from the target. Synonym for invoke(IN)

forEach

open fun forEach(p0: Consumer<in Meta>)

get

open operator fun <R : IN> get(target: R): FINAL

Lens operation to get the value from the target. Synonym for invoke(IN)

invoke

open operator override fun invoke(target: IN): FINAL

Lens operation to get the value from the target

iterator

open operator override fun iterator(): Iterator<Meta>

matches

fun <T> Lens<Request, T>.matches(fn: (T) -> Boolean): Router

Check the content of any lens on a request for routing purposes.

ofOrLensFailure

fun <IN : Any, VALUE : Value<T>, T : Any> Lens<IN, String>.ofOrLensFailure(vf: ValueFactory<VALUE, T>, value: String): VALUE

Convert ot throw a lens failure when constructing a value type

restrictFrom

open fun <NEXT : IN> restrictFrom(): LensExtractor<NEXT, FINAL>

Restrict the type that this Lens can extract from

spliterator

open fun spliterator(): Spliterator<Meta>

then

fun Events.~~then~~(next: Events): (Event) -> Unit

toString

open override fun toString(): String

withAsyncApi

fun HttpHandler.withAsyncApi(): AsyncHttpHandler

Convert a synchronous HttpHandler API to mimic AsyncHttpClient