LensBuilder

Common construction patterns for all lens implementations.

Functions

abstract fun defaulted(name: String, default: OUT, description: String? = null, metadata: Map<String, Any> = emptyMap()): Lens<IN, OUT>

Make a concrete Lens for this spec that falls back to the default value if no value is found in the target.

abstract fun defaulted(name: String, default: LensExtractor<IN, OUT>, description: String? = null, metadata: Map<String, Any> = emptyMap()): Lens<IN, OUT>

Make a concrete Lens for this spec that falls back to another lens if no value is found in the target.

abstract fun optional(name: String, description: String? = null, metadata: Map<String, Any> = emptyMap()): Lens<IN, OUT?>

Make a concrete Lens for this spec that looks for an optional value in the target.

abstract fun required(name: String, description: String? = null, metadata: Map<String, Any> = emptyMap()): Lens<IN, OUT>

Make a concrete Lens for this spec that looks for a required value in the target.