Play Framework 2.5でobjectにDependency Injection(DI)する - Qiita

package utils trait UID { type Value = String def generate: Value def isValid(id: Value): Boolean } object UUID extends UID { private val UUIDRegex = """\p{Alnum}{8}(?:-\p{Alnum}{4}){3}-\p{Alnum}{12}""" def generate: String = java.util.UUID.randomUUID().toString def isValid(id: String): Boolean = id.matches(UUIDRegex) } さて、JSONからUIDを受け取る場合、 暗黙的なReads[User]などを、(例えば)object Implicitsにまとめて定義する このReads