Timshel

import play.api.data.validation._

trait Constraints {
  /**
   * Defines a ‘required’ constraint for `Optional` values, i.e. one in which None are invalid.
   *
   * '''name'''[constraint.required]
   * '''error'''[error.required]
   */
  def nonNone[A]: Constraint[Option[A]] = Constraint[Option[A]]("constraint.required") { o =>

Timshel

package play.api.i18n

import play.api._
import play.api.i18n._

import scala.collection.JavaConverters._

import scalax.file._
import scalax.io.JavaConverters._

Timshel

import annotation.tailrec
import java.util.concurrent.atomic.AtomicReference
 
class Atomic[T](val atomic : AtomicReference[T]) {
  
  @tailrec
  final def update(f: T => T) : T = {
    val oldValue = atomic.get()
    val newValue = f(oldValue)
    if (atomic.compareAndSet(oldValue, newValue)) newValue else update(f)

Timshel

package controllers

import play.api._
import play.api.data._
import play.api.data.Forms._
import play.api.mvc._

object Application extends Controller {

  val form = Form(

Timshel

If your csv doesn't contain escaped newlines then it is pretty easy to do a progressive parsing without putting the whole file into memory. The iteratee library comes with a method search inside play.api.libs.iteratee.Parsing :

def search (needle: Array[Byte]): Enumeratee[Array[Byte], MatchInfo[Array[Byte]]]

which will partition your stream into Matched[Array[Byte]] and Unmatched[Array[Byte]]

Then you can combine a first iteratee that takes a header and another that will fold into the umatched results. This should look like the following code:

// break at each match and concat unmatches and drop the last received element (the match)

Timshel

This is the fork of Xamplez core Configuration Gist

Timshel

import annotation.tailrec
import java.util.concurrent.atomic.AtomicReference
 
class Atomic[T](val atomic : AtomicReference[T]) {
  
  @tailrec
  final def update(f: T => T) : T = {
    val oldValue = atomic.get()
    val newValue = f(oldValue)
    if (atomic.compareAndSet(oldValue, newValue)) newValue else update(f)

Timshel

Form(
    tuple(
        "numero" -> optional(nonEmptyText(6,6)),
        "nom" -> cleanText(1,64),
        "prenom" -> cleanText(1,64),
        "coefficient" -> number
    )
)