Rule

abstract def validate(data: I): VA[O]

Apply the Rule to data

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def compose[P](m: Mapping[ValidationError, O, P]): Rule[I, P]

def compose[P](sub: ⇒ RuleLike[O, P]): Rule[I, P]

def compose[P](path: Path)(sub: ⇒ RuleLike[O, P]): Rule[I, P]

Compose two Rules

val r1: Rule[JsValue, String] = // implementation
val r2: Rule[String, Date] = // implementation
val r = r1.compose(r2)

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def flatMap[B](f: (O) ⇒ Rule[I, B]): Rule[I, B]

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def orElse[OO >: O](t: ⇒ RuleLike[I, OO]): Rule[I, OO]

Create a new Rule that try this Rule, and apply t if it fails

val rb: Rule[JsValue, A] = From[JsValue]{ __ =>
  ((__ \ "name").read[String] ~ (__ \ "foo").read[Int])(B.apply _)
}

val rc: Rule[JsValue, A] = From[JsValue]{ __ =>
  ((__ \ "name").read[String] ~ (__ \ "bar").read[Int])(C.apply _)
}
val rule = rb orElse rc orElse Rule(_ => typeFailure)

def repath(f: (Path) ⇒ Path): Rule[I, O]

This methods allows you to modify the Path of errors (if the result is a Failure) when aplying the Rule

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

def |+|[OO <: O](r2: RuleLike[I, OO]): Rule[I, O]

Create a new Rule the validate this Rule and r2 simultaneously If this and r2 both fail, all the error are returned

val valid = Json.obj(
   "firstname" -> "Julien",
   "lastname" -> "Tournay")
val composed = notEmpty |+| minLength(3)
(Path \ "firstname").read(composed).validate(valid) // Success("Julien")