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.