Scala Formatter类代码示例

//设置package包名称以及导入依赖的类
package com.github.stonexx.play.data.formats

import com.github.stonexx.scala.data.OrderedEnumeration
import com.github.stonexx.scala.util.string._
import play.api.data.FormError
import play.api.data.format.Formatter

trait EnumFormats {

  def enumFormat[E <: Enumeration](
    parse: String => E#Value,
    serialize: E#Value => String,
    error: (String, Throwable) => Seq[FormError]
  ): Formatter[E#Value] = new Formatter[E#Value] {
    def bind(key: String, data: Map[String, String]): Either[Seq[FormError], E#Value] =
      play.api.data.format.Formats.stringFormat.bind(key, data).right.flatMap { s =>
        scala.util.control.Exception.allCatch[E#Value].either(parse(s)).left.map(error(key, _))
      }

    def unbind(key: String, value: E#Value) = Map(key -> serialize(value))
  }

  def enumIdFormat[E <: Enumeration](enum: E): Formatter[E#Value] = enumFormat(
    s => enum(s.toInt), _.id.toString,
    (key, _) => Seq(FormError(key, "error.enum.id", Nil))
  )

  def enumNameFormat[E <: Enumeration](enum: E): Formatter[E#Value] = enumFormat(
    s => enum.values.find(_.toString.camelToUnderscore == s.camelToUnderscore).get, _.toString,
    (key, _) => Seq(FormError(key, "error.enum.name", Nil))
  )

  def enumOrderedFormat[E <: OrderedEnumeration](enum: E): Formatter[E#Ordered] = new Formatter[E#Ordered] {
    def bind(key: String, data: Map[String, String]): Either[Seq[FormError], E#Ordered] =
      play.api.data.format.Formats.stringFormat.bind(key, data).right.flatMap { s =>
        scala.util.control.Exception.allCatch[E#Ordered].either(enum.Ordered.parse(s))
          .left.map(_ => Seq(FormError(key, "error.sort", Seq(s))))
      }

    def unbind(key: String, value: E#Ordered) = Map(key -> value.toString)
  }
} 

//设置package包名称以及导入依赖的类
package utils

import java.time.LocalDate

import models.DateComponents
import org.apache.commons.lang3.StringUtils
import play.api.data.format.Formatter
import play.api.data.validation.{Constraint, Invalid, Valid, ValidationError}
import play.api.data.{FieldMapping, FormError, Forms}

import scala.util.{Failure, Success}

object ValidationUtils {

  implicit val mandatoryBooleanFormatter = new Formatter[Boolean] {

    def bind(key: String, data: Map[String, String]) = {
      Right(data.getOrElse(key, "")).right.flatMap {
        case "true" => Right(true)
        case "false" => Right(false)
        case _ => Left(Seq(FormError(key, s"$key.error.boolean", Nil)))
      }
    }

    def unbind(key: String, value: Boolean) = Map(key -> value.toString)
  }

  val mandatoryBoolean: FieldMapping[Boolean] = Forms.of[Boolean]
  val notBlank: (String) => Boolean = StringUtils.isNotBlank

  def unconstrained[T] = Constraint[T] { (t: T) => Valid }

  def inRange[T](minValue: T, maxValue: T, errorCode: String = "")(implicit ordering: scala.math.Ordering[T]): Constraint[T] =
    Constraint[T] { (t: T) =>
      assert(ordering.compare(minValue, maxValue) < 0, "min bound must be less than max bound")
      (ordering.compare(t, minValue).signum, ordering.compare(t, maxValue).signum) match {
        case (1, -1) | (0, _) | (_, 0) => Valid
        case (_, 1) => Invalid(ValidationError(s"error$errorCode.range.above", maxValue))
        case (-1, _) => Invalid(ValidationError(s"error$errorCode.range.below", minValue))
      }
    }

  def validDate(constraint: Constraint[LocalDate] = unconstrained) = Constraint[DateComponents] {
    (dcs: DateComponents) =>
      DateComponents.toLocalDate(dcs) match {
        case Failure(_) => Invalid(ValidationError("error.date.invalid", dcs))
        case Success(localDate) => constraint(localDate)
      }
  }

  def optionallyMatchingPattern(regex: String): Constraint[String] =
    Constraint[String] { s: String =>
      Option(s) match {
        case None | Some("") => Valid
        case _ if s.matches(regex) => Valid
        case _ => Invalid(ValidationError("error.string.pattern", s))
      }
    }

} 

//设置package包名称以及导入依赖的类
package lila.common

import org.joda.time.DateTimeZone
import play.api.data.format.Formats._
import play.api.data.format.Formatter
import play.api.data.Forms._

object Form {

  def options(it: Iterable[Int], pattern: String) = it map { d =>
    d -> (pluralize(pattern, d) format d)
  }

  def options(it: Iterable[Int], transformer: Int => Int, pattern: String) = it map { d =>
    d -> (pluralize(pattern, transformer(d)) format transformer(d))
  }

  def options(it: Iterable[Int], code: String, pattern: String) = it map { d =>
    (d + code) -> (pluralize(pattern, d) format d)
  }

  def optionsDouble(it: Iterable[Double], format: Double => String) = it map { d =>
    d -> format(d)
  }

  def numberIn(choices: Iterable[(Int, String)]) =
    number.verifying(hasKey(choices, _))

  def numberInDouble(choices: Iterable[(Double, String)]) =
    of[Double].verifying(hasKey(choices, _))

  def stringIn(choices: Iterable[(String, String)]) =
    text.verifying(hasKey(choices, _))

  def hasKey[A](choices: Iterable[(A, _)], key: A) =
    choices.map(_._1).toList contains key

  private def pluralize(pattern: String, nb: Int) =
    pattern.replace("{s}", (nb != 1).fold("s", ""))

  object formatter {
    def stringFormatter[A](from: A => String, to: String => A): Formatter[A] = new Formatter[A] {
      def bind(key: String, data: Map[String, String]) = stringFormat.bind(key, data).right map to
      def unbind(key: String, value: A) = stringFormat.unbind(key, from(value))
    }
    def intFormatter[A](from: A => Int, to: Int => A): Formatter[A] = new Formatter[A] {
      def bind(key: String, data: Map[String, String]) = intFormat.bind(key, data).right map to
      def unbind(key: String, value: A) = intFormat.unbind(key, from(value))
    }
  }

  object UTCDate {
    val dateTimePattern = "yyyy-MM-dd HH:mm"
    val utcDate = jodaDate(dateTimePattern, DateTimeZone.UTC)
    implicit val dateTimeFormat = jodaDateTimeFormat(dateTimePattern)
  }
}