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• 1.1
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• package.scala

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play.api.data.mapping.package.scala Maven / Gradle / Ivy

package play.api.data

/**
 * Contains the validation API used by `Form`.
 *
 * For example, to define a custom constraint:
 * {{{
 *   val negative = Constraint[Int] {
 *     case i if i < 0 => Valid
 *     case _ => Invalid("Must be a negative number.")
 *   }
 * }}}
 */
package object mapping {
  @annotation.implicitNotFound("No implicit Mapping found from ${I} to ${O}. Try to define an implicit Mapping[${E}, ${I}, ${O}].")
  type Mapping[E, I, O] = I => Validation[E, O]
  type Constraint[T] = Mapping[ValidationError, T, T]
  type VA[O] = Validation[(Path, Seq[ValidationError]), O]

  // alias ValidationError to avoid multiple imports
  type ValidationError = play.api.data.validation.ValidationError
  def ValidationError(message: String, args: Any*): ValidationError =
    play.api.data.validation.ValidationError.apply(message, args: _*)
}