fork(2) download 
  1. import scala.util.control.Exception.catching
  2.  
  3. object Main extends App {
  4.   case class A1(yoba: String, petushok: String = "kukareku")
  5.   case class A2(peka: Int, list: Seq[String] = Nil)
  6.  
  7.   type YobaKostyl = PartialFunction[AnyRef, Option[AnyRef]]
  8.  
  9.   def hasField(name: String): YobaKostyl = {
  10.     case obj ⇒
  11.       catching(classOf[NoSuchFieldException])
  12.       	.opt(obj.getClass.getDeclaredField(name)).map(_ ⇒ obj)
  13.   }
  14.  
  15.   def hasFieldValue[T](name: String, value: T): YobaKostyl = {
  16.     case obj ⇒
  17.       catching(classOf[NoSuchFieldException])
  18.       	.either(obj.getClass.getDeclaredField(name)) match {
  19.         case Left(exc) ⇒
  20.           None
  21.         case Right(field) ⇒
  22.           field.setAccessible(true)
  23.           Some(field.get(obj)).filter(value ==).map(_ ⇒ obj)
  24.       }
  25.   }
  26.  
  27.   def hasListValue[T](name: String, value: T): YobaKostyl = {
  28.     case obj ⇒
  29.       catching(classOf[NoSuchFieldException])
  30.       	.either(obj.getClass.getDeclaredField(name)) match {
  31.         case Left(exc) ⇒
  32.           None
  33.         case Right(field) ⇒
  34.           field.setAccessible(true)
  35.           Some(field.get(obj)).collect {
  36.           	case list: Iterable[_] ⇒ list
  37.           }.filter(_.exists(value ==)).map(_ ⇒ obj)
  38.       }
  39.   }
  40.  
  41.   def and(f: YobaKostyl*) = f.reduce((f1, f2) ⇒ f1.andThen(_.flatMap(f2)))
  42.   def or(obj: AnyRef, f: YobaKostyl*) = f.reduce((f1, f2) ⇒ f1.andThen(_.orElse(f2(obj))))
  43.  
  44.  
  45.   val data = Vector(A1("123"), A2(321, Vector("PODI", "PODMOJSA", "MANYA")), A1("ALLOU", "ko-ko-ko"), A2(900))
  46.  
  47.   Iterator.continually(readLine()).takeWhile(null ne).foreach(f ⇒ {
  48.   	println(data.flatMap(yoba ⇒ hasListValue("list", f)(yoba)).mkString(","))
  49.   })
  50. }
  51.  
Success #stdin #stdout 0.4s 382144KB
comments (?)
stdin 
MANYA
stdout 
A2(321,Vector(PODI, PODMOJSA, MANYA))
https://ideone.com/2zuS7P
language:
Scala (scala 2.12.8)
created:
9 years ago
visibility:
public

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