http4k / org.http4k.lens / LensSpec
open class LensSpec<IN : Any, OUT>
Represents a uni-directional extraction of an entity from a target.
| Name | Summary |
|---|---|
| <init> | Represents a uni-directional extraction of an entity from a target.LensSpec(location: String, paramMeta: ParamMeta, get: LensGet<IN, OUT>) |
| Name | Summary |
|---|---|
| location | val location: String |
| multi | open val multi: MultiLensSpec<IN, OUT> |
| paramMeta | val paramMeta: ParamMeta |
| Name | Summary |
|---|---|
| defaulted | Make a concrete Lens for this spec that falls back to the default value if no value is found in the target.open fun defaulted(name: String, default: OUT, description: String? = null): Lens<IN, OUT>Make a concrete Lens for this spec that falls back to another lens if no value is found in the target. open fun defaulted(name: String, default: Lens<IN, OUT>, description: String? = null): Lens<IN, OUT> |
| map | Create another LensSpec which applies the uni-directional transformation to the result. Any resultant Lens can only be used to extract the final type from a target.fun <NEXT> map(nextIn: (OUT) -> NEXT): LensSpec<IN, NEXT> |
| optional | Make a concrete Lens for this spec that looks for an optional value in the target.open fun optional(name: String, description: String? = null): Lens<IN, OUT?> |
| required | Make a concrete Lens for this spec that looks for a required value in the target.open fun required(name: String, description: String? = null): Lens<IN, OUT> |
| Name | Summary |
|---|---|
| BiDiLensSpec | Represents a bi-directional extraction of an entity from a target, or an insertion into a target.open class BiDiLensSpec<IN : Any, OUT> : LensSpec<IN, OUT> |