org.json4s

ExtractableJsonAstNode

class ExtractableJsonAstNode extends AnyRef

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  1. ExtractableJsonAstNode
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Instance Constructors

  1. new ExtractableJsonAstNode (jv: JValue)

Value Members

  1. def != (arg0: AnyRef): Boolean

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  2. def != (arg0: Any): Boolean

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  3. def ## (): Int

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  4. def == (arg0: AnyRef): Boolean

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  5. def == (arg0: Any): Boolean

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  6. def as [A] (implicit reader: Reader[A], mf: Manifest[A]): A

    Given that an implicit reader of type A is in scope It will deserialize the org.json4s.JsonAST.JValue to an object of type A

    Given that an implicit reader of type A is in scope It will deserialize the org.json4s.JsonAST.JValue to an object of type A

    Example:

      case class Person(name: String)
  implicit object PersonReader extends Reader[Person] {
    def read(json: JValue): Person = Person((json \ "name").extract[String])
  }
  JObject(JField("name", JString("Joe")) :: Nil).as[Person]

  7. def asInstanceOf [T0] : T0

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  8. def clone (): AnyRef

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    @throws()

  9. def eq (arg0: AnyRef): Boolean

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  10. def equals (arg0: Any): Boolean

    Definition Classes
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  11. def extract [A] (implicit formats: Formats, mf: Manifest[A]): A

    Extract a value from a JSON.

    Extract a value from a JSON.

    Value can be:

    • case class
    • primitive (String, Boolean, Date, etc.)
    • supported collection type (List, Seq, Map[String, _], Set)
    • any type which has a configured custom deserializer

    Example: 

    case class Person(name: String)
JObject(JField("name", JString("joe")) :: Nil).extract[Person] == Person("joe")

  12. def extractOpt [A] (implicit formats: Formats, mf: Manifest[A]): Option[A]

    Extract a value from a JSON.

    Extract a value from a JSON.

    Value can be:

    • case class
    • primitive (String, Boolean, Date, etc.)
    • supported collection type (List, Seq, Map[String, _], Set)
    • any type which has a configured custom deserializer

    Example: 

    case class Person(name: String)
JObject(JField("name", JString("joe")) :: Nil).extractOpt[Person] == Some(Person("joe"))

  13. def extractOrElse [A] (default: ⇒ A)(implicit formats: Formats, mf: Manifest[A]): A

    Extract a value from a JSON using a default value.

    Extract a value from a JSON using a default value.

    Value can be:

    • case class
    • primitive (String, Boolean, Date, etc.)
    • supported collection type (List, Seq, Map[String, _], Set)
    • any type which has a configured custom deserializer

    Example: 

    case class Person(name: String)
JNothing.extractOrElse(Person("joe")) == Person("joe")

  14. def finalize (): Unit

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    protected[lang]
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  15. def getAs [A] (implicit reader: Reader[A], mf: Manifest[A]): Option[A]

    Given that an implicit reader of type A is in scope It will deserialize the org.json4s.JsonAST.JValue to an object of type Option[A]

    Given that an implicit reader of type A is in scope It will deserialize the org.json4s.JsonAST.JValue to an object of type Option[A]

    Example:

      case class Person(name: String)
  implicit object PersonReader extends Reader[Person] {
    def read(json: JValue): Person = Person((json \ "name").extract[String])
  }
  JObject(JField("name", JString("Joe")) :: Nil).getAs[Person]

  16. def getAsOrElse [A] (default: ⇒ A)(implicit reader: Reader[A], mf: Manifest[A]): A

    Given that an implicit reader of type A is in scope It will deserialize the org.json4s.JsonAST.JValue to an object of type A if an error occurs it will return the default value.

    Given that an implicit reader of type A is in scope It will deserialize the org.json4s.JsonAST.JValue to an object of type A if an error occurs it will return the default value.

    Example:

      case class Person(name: String)
  implicit object PersonReader extends Reader[Person] {
    def read(json: JValue): Person = Person((json \ "name").extract[String])
  }
  JObject(JField("name", JString("Joe")) :: Nil).getAsOrElse(Person("Tom"))

  17. def getClass (): java.lang.Class[_]

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  18. def hashCode (): Int

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  19. def isInstanceOf [T0] : Boolean

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  20. def ne (arg0: AnyRef): Boolean

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  21. def notify (): Unit

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  22. def notifyAll (): Unit

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  23. def synchronized [T0] (arg0: ⇒ T0): T0

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  24. def toString (): String

    Definition Classes
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  25. def wait (): Unit

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    @throws()

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

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    @throws()

  27. def wait (arg0: Long): Unit

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