Scala json format for recursive classes with generics
0
I'm trying to capture rules into a model
here is what I have
trait Criterion[T] {
val name: String
def matches(t: T): Future[Boolean]
}
trait Predicate[T] extends Criterion[T] {
val criteria: Seq[Criterion[T]]
val operand: RuleOperand.Name
override def matches(t: T): Future[Boolean] = {
val predicate: Boolean => Boolean = if (operand == RuleOperand.ANY) _ == true else _ == false
Future.find(criteria.map(_.matches(t)))(predicate) map {
case Some(true) if operand == RuleOperand.ANY => true
case Some(false) if operand == RuleOperand.ALL => true
case _ => false
}
}
}
case class WeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "weight"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.weight > limit)
}
case class HeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "height"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.height > limit)
}
Criterion works well from Object to Json and from Json to Object, but I'm unable to get the Predicate format working, How can I get it to work?
json scala
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
add a comment |
0
I'm trying to capture rules into a model
here is what I have
trait Criterion[T] {
val name: String
def matches(t: T): Future[Boolean]
}
trait Predicate[T] extends Criterion[T] {
val criteria: Seq[Criterion[T]]
val operand: RuleOperand.Name
override def matches(t: T): Future[Boolean] = {
val predicate: Boolean => Boolean = if (operand == RuleOperand.ANY) _ == true else _ == false
Future.find(criteria.map(_.matches(t)))(predicate) map {
case Some(true) if operand == RuleOperand.ANY => true
case Some(false) if operand == RuleOperand.ALL => true
case _ => false
}
}
}
case class WeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "weight"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.weight > limit)
}
case class HeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "height"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.height > limit)
}
Criterion works well from Object to Json and from Json to Object, but I'm unable to get the Predicate format working, How can I get it to work?
json scala
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
2
What JSON library are you using?
– erip
Nov 14 '18 at 19:29
play-json, "com.typesafe.play" %% "play-json" % "2.6.10"
– Manoj
Nov 15 '18 at 9:13
add a comment |
0
0
0
1
I'm trying to capture rules into a model
here is what I have
trait Criterion[T] {
val name: String
def matches(t: T): Future[Boolean]
}
trait Predicate[T] extends Criterion[T] {
val criteria: Seq[Criterion[T]]
val operand: RuleOperand.Name
override def matches(t: T): Future[Boolean] = {
val predicate: Boolean => Boolean = if (operand == RuleOperand.ANY) _ == true else _ == false
Future.find(criteria.map(_.matches(t)))(predicate) map {
case Some(true) if operand == RuleOperand.ANY => true
case Some(false) if operand == RuleOperand.ALL => true
case _ => false
}
}
}
case class WeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "weight"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.weight > limit)
}
case class HeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "height"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.height > limit)
}
Criterion works well from Object to Json and from Json to Object, but I'm unable to get the Predicate format working, How can I get it to work?
json scala
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
I'm trying to capture rules into a model
here is what I have
trait Criterion[T] {
val name: String
def matches(t: T): Future[Boolean]
}
trait Predicate[T] extends Criterion[T] {
val criteria: Seq[Criterion[T]]
val operand: RuleOperand.Name
override def matches(t: T): Future[Boolean] = {
val predicate: Boolean => Boolean = if (operand == RuleOperand.ANY) _ == true else _ == false
Future.find(criteria.map(_.matches(t)))(predicate) map {
case Some(true) if operand == RuleOperand.ANY => true
case Some(false) if operand == RuleOperand.ALL => true
case _ => false
}
}
}
case class WeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "weight"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.weight > limit)
}
case class HeightCriterion(limit: Int) extends Criterion[Person] {
override val name: String = "height"
override def matches(person: Person): Future[Boolean] =
Future.successful(person.height > limit)
}
Criterion works well from Object to Json and from Json to Object, but I'm unable to get the Predicate format working, How can I get it to work?
json scala
json scala
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
asked Nov 14 '18 at 19:15
ManojManoj
4,04774875
4,04774875
2
What JSON library are you using?
– erip
Nov 14 '18 at 19:29
play-json, "com.typesafe.play" %% "play-json" % "2.6.10"
– Manoj
Nov 15 '18 at 9:13
add a comment |
2
What JSON library are you using?
– erip
Nov 14 '18 at 19:29
play-json, "com.typesafe.play" %% "play-json" % "2.6.10"
– Manoj
Nov 15 '18 at 9:13
2
2
What JSON library are you using?
– erip
Nov 14 '18 at 19:29
What JSON library are you using?
– erip
Nov 14 '18 at 19:29
play-json, "com.typesafe.play" %% "play-json" % "2.6.10"
– Manoj
Nov 15 '18 at 9:13
play-json, "com.typesafe.play" %% "play-json" % "2.6.10"
– Manoj
Nov 15 '18 at 9:13
add a comment |
0
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2
What JSON library are you using?
– erip
Nov 14 '18 at 19:29
play-json, "com.typesafe.play" %% "play-json" % "2.6.10"
– Manoj
Nov 15 '18 at 9:13