A scala micro-library introducing Value Type (tiny type) trait and some subtraits for simple types like String, Int, Boolean and BigDecimal. It also contains tooling for creating Play JSON format and PathBinders for derived types.
import play.api.libs.json.Json import play.api.libs.json.Json.{toJson, fromJson} import uk.gov.voa.valuetype.IntValue import uk.gov.voa.valuetype.play.formats.ValueTypeFormat case class MyIntValue(value: Int) extends IntValue implicit val myIntValueFormat = ValueTypeFormat.format(MyIntValue.apply) toJson(MyIntValue(2)) fromJson(Json.parse("2"))import play.api.mvc.PathBindable import uk.gov.voa.valuetype.IntValue import uk.gov.voa.valuetype.play.binders.ValueTypePathBinder._ import scala.util.Try case class MyIntValue(value: Int) extends IntValue implicit val intValueParser: (String) => Try[MyIntValue] = value => Try { MyIntValue(value.toInt) } val intValueBinder = implicitly[PathBindable[MyIntValue]] intValueBinder.bind("key", "1") intValueBinder.unbind("key", MyIntValue(1))Include the following dependency in your SBT build
resolvers += Resolver.bintrayRepo("hmrc", "releases") libraryDependencies += "uk.gov.hmrc" %% "valuetype" % "<INSERT VERSION>"This code is open source software licensed under the Apache 2.0 License.