Class

spray.json

gadt

Related Doc: package json

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final class gadt extends Annotation with StaticAnnotation

An annotation that designates that a sealed trait is a generalized algebraic datatype (GADT), and that a type field containing the serialized childrens' types should be added to the final JSON objects.

Note that by default all sealed traits are treated as GADTs, with a type field called type. This annotation enables overriding the name of that field and is really only useful if a child itself has a field called type that would result in a conflict.

Example:

// the JSON field "kind" will contain the actual type of the serialized child
@gadt("kind") sealed abstract class Keyword(`type`: String)
case class If(`type`: String) extends Keyword(`type`)
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Instance Constructors

  1. new gadt(typeFieldName: String = "type")

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    typeFieldName

    the name of the field to inject into a serialized JSON object

Value Members

  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. final def asInstanceOf[T0]: T0

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  5. def clone(): AnyRef

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    protected[java.lang]
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    @throws( ... )

  6. final def eq(arg0: AnyRef): Boolean

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  7. def equals(arg0: Any): Boolean

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  8. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )

  9. final def getClass(): Class[_]

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  10. def hashCode(): Int

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  11. final def isInstanceOf[T0]: Boolean

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  12. final def ne(arg0: AnyRef): Boolean

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  13. final def notify(): Unit

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  14. final def notifyAll(): Unit

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  15. final def synchronized[T0](arg0: ⇒ T0): T0

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  16. def toString(): String

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  17. val typeFieldName: String

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    the name of the field to inject into a serialized JSON object

  18. final def wait(): Unit

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    @throws( ... )

  19. final def wait(arg0: Long, arg1: Int): Unit

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  20. final def wait(arg0: Long): Unit

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Inherited from StaticAnnotation

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