package org.onap.dcae.collectors.veshv.utils.arrow
import arrow.core.Either
+import arrow.core.ForOption
import arrow.core.Option
import arrow.core.Try
+import arrow.core.extensions.option.monad.monad
+import arrow.core.fix
import arrow.core.identity
import arrow.syntax.collections.firstOption
+import arrow.typeclasses.MonadContinuation
+import reactor.core.publisher.Flux
+import reactor.core.publisher.Mono
import java.util.concurrent.atomic.AtomicReference
/**
* @since July 2018
*/
+object OptionUtils {
+ fun <A> binding(c: suspend MonadContinuation<ForOption, *>.() -> A)
+ : Option<A> = Option.monad().binding(c).fix()
+}
+
fun <A> Either<A, A>.flatten() = fold(::identity, ::identity)
fun <B> Either<Throwable, B>.rightOrThrow() = fold({ throw it }, ::identity)
fun <A, B> Either<A, B>.rightOrThrow(mapper: (A) -> Throwable) = fold({ throw mapper(it) }, ::identity)
+fun <A : Exception, B> Flux<Either<A, B>>.throwOnLeft(): Flux<B> = map { it.rightOrThrow() }
+
+fun <A, B> Flux<Either<A, B>>.throwOnLeft(f: (A) -> Exception): Flux<B> = map { it.rightOrThrow(f) }
+
+fun <A, B> Mono<Either<A, B>>.throwOnLeft(f: (A) -> Exception): Mono<B> = map { it.rightOrThrow(f) }
+
fun <A> AtomicReference<A>.getOption() = Option.fromNullable(get())
fun <A> Option.Companion.fromNullablesChain(firstValue: A?, vararg nextValues: () -> A?): Option<A> =
fun <A> Option<A>.doOnEmpty(action: () -> Unit): Option<A> = apply { if (isEmpty()) action() }
-fun <A> Try<A>.doOnFailure(action: () -> Unit): Try<A> = apply { if (isFailure()) action() }
+fun <A> Try<A>.doOnFailure(action: (Throwable) -> Unit): Try<A> = apply {
+ if (this is Try.Failure) {
+ action(exception)
+ }
+}
+
+fun <A, B> A.mapBinding(c: suspend MonadContinuation<ForOption, *>.(A) -> B)
+ : Option<B> = let { OptionUtils.binding { c(it) } }
+
+
+
+
+
+
+