api

http4k / org.http4k.lens / LensExtractor

LensExtractor

interface LensExtractor<in IN, out OUT> : (IN) -> OUT

Functions

Name	Summary
extract	Lens operation to get the value from the target. Synonym for invoke(IN)`open fun extract(target: IN): OUT`
get	Lens operation to get the value from the target. Synonym for invoke(IN)`open operator fun <R : IN> get(target: R): OUT`
invoke	Lens operation to get the value from the target`abstract operator fun invoke(target: IN): OUT`
restrictFrom	Restrict the type that this Lens can extract from`open fun <NEXT : IN> restrictFrom():` `LensExtractor<NEXT, OUT>`

Extension Functions

Name	Summary
asResult	Convert the result of a lens extraction to a Result4k type which`fun <IN, OUT>` `LensExtractor<IN, OUT>.asResult():` `LensExtractor<IN, Result<OUT,` `LensFailure>>`

Inheritors

Name	Summary
BodyLens	A BodyLens provides the uni-directional extraction of an entity from a target body.`open class BodyLens<out FINAL> :` `LensExtractor<HttpMessage, FINAL>`
Lens	A Lens provides the uni-directional extraction of an entity from a target.`open class Lens<in IN :` `Any, out FINAL> :` `LensExtractor<IN, FINAL>,` `Iterable<Meta>`
LensInjectorExtractor	`interface LensInjectorExtractor<IN, OUT> :` `LensExtractor<IN, OUT>,` `LensInjector<OUT, IN>`
Store	`interface Store<OUT> :` `LensInjector<OUT,` `Request>,` `LensExtractor<Request, OUT>`
WsMessageLens	A WsMessageLens provides the extraction of an entity from a target WsMessage.`open class WsMessageLens<out FINAL> :` `LensExtractor<WsMessage, FINAL>`