Fj Scala Conversions

Library to convert functional java types to scala and vice versa

Features

This library provides conversions from Functional Java Library and Java 8 functional types to Scala and vice versa. The following type conversions are supported:

Functional Java

• fj.data.Option
• fj.data.Validation

Java 8

• java.util.Optional

Installation

Add the library as an SBT dependency

libraryDependencies ++= Seq(
  "ch.acmesoftware" %% "fj-scala-conversions" % "VERSION"
)

See GitHub Releases for available versions. The library is available for Scala 2.10, 2.11 and 2.12.

Major releases follow the Functional Java Library versions:

FJ Version	Scala Conversions Version
4.6	1.x.x

Usage

Just import the ch.acmesoftware.fjscalaconversions._ package object contents, and call the converter methods:

FJ to Scala example

import ch.acmesoftware.fjscalaconversions._
import java.util.Optional

// option
val fjOption = fj.data.Option.some("example")
val scalaOption: Option[String] = fjOption.asScala()

val java8Option = Optional.of("example")
val scalaOption2 = java8Option.asScala()

// validation
import scala.util.Try

val fjValidation = fj.data.Validation.success[Exception, String]("example") // failurew type must be explicitely stated
val scalaTry: Try[String] = fjValidation.asScala()

Scala to FJ example

import ch.acmesoftware.fjscalaconversions._
import java.util.Optional

// option
val scalaOption = Some("example")
val fjOption: fj.data.Option[String] = scalaOption.asFj()
val java8Optional: Optional[String] = scalaOption.asJava8()

// validation
import scala.util.Try

val scalaTry = Try("example")
val fjValidation: fj.data.Validation[Throwable, String] = scalaTry.asFj()

Contribution

Contribution in any kind are very welcome. Please use the GitHub issue tracking / pull requests.

This library with all its contents is licensed under the MIT License by ACME Software Solutions GmbH. See LICENSE for more information.