Packages

trait Format[A] extends Writes[A] with Reads[A]

Json formatter: write an implicit to define both a serializer and a deserializer for any type.

Annotations
@implicitNotFound("No Json formatter found for type ${A}. Try to implement an implicit Format for this type.")
Source
Format.scala
Linear Supertypes
Reads[A], Writes[A], AnyRef, Any
Known Subclasses
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Inherited
  1. Format
  2. Reads
  3. Writes
  4. AnyRef
  5. Any
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Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def reads(json: JsValue): JsResult[A]

    Convert the JsValue into a A

    Convert the JsValue into a A

    Definition Classes
    Reads
  2. abstract def writes(o: A): JsValue

    Converts the A value into a JsValue.

    Converts the A value into a JsValue.

    Definition Classes
    Writes

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def andThen[B](rb: Reads[B])(implicit witness: <:<[A, JsValue]): Reads[B]
    Definition Classes
    Reads
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. def collect[B](error: JsonValidationError)(f: PartialFunction[A, B]): Reads[B]
    Definition Classes
    Reads
  8. def composeWith[B <: JsValue](rb: Reads[B]): Reads[A]

    Creates a new Reads, which first passes the input JSON to rb, and then it executes this Reads on the pre-processed JSON (if rb has successfully handled the input JSON).

    Creates a new Reads, which first passes the input JSON to rb, and then it executes this Reads on the pre-processed JSON (if rb has successfully handled the input JSON).

    Definition Classes
    Reads
  9. def contramap[B](f: (B) => A): Writes[B]

    Returns a new instance that first converts a B value to a A one, before converting this A value into a JsValue.

    Returns a new instance that first converts a B value to a A one, before converting this A value into a JsValue.

    Definition Classes
    Writes
  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  12. def filter(error: JsonValidationError)(f: (A) => Boolean): Reads[A]
    Definition Classes
    Reads
  13. def filter(f: (A) => Boolean): Reads[A]
    Definition Classes
    Reads
  14. def filterNot(error: JsonValidationError)(f: (A) => Boolean): Reads[A]
    Definition Classes
    Reads
  15. def filterNot(f: (A) => Boolean): Reads[A]
    Definition Classes
    Reads
  16. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  17. def flatMap[B](f: (A) => Reads[B]): Reads[B]
    Definition Classes
    Reads
  18. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  19. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  20. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  21. def map[B](f: (A) => B): Reads[B]

    Create a new Reads which maps the value produced by this Reads.

    Create a new Reads which maps the value produced by this Reads.

    B

    The type of the value produced by the new Reads.

    f

    the function applied on the result of the current instance, if successful

    Definition Classes
    Reads
  22. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  23. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  24. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  25. def orElse(v: Reads[A]): Reads[A]

    Creates a new Reads, based on this one, which first executes this Reads' logic then, if this Reads resulted in a JsError, runs the second Reads on the JsValue.

    Creates a new Reads, based on this one, which first executes this Reads' logic then, if this Reads resulted in a JsError, runs the second Reads on the JsValue.

    v

    the Reads to run if this one gets a JsError

    returns

    A new Reads with the updated behavior.

    Definition Classes
    Reads
  26. def preprocess(f: PartialFunction[JsValue, JsValue]): Reads[A]

    Creates a new Reads, which first transforms the input JSON using the given tranformer, and then it executes this Reads on the pre-processed JSON.

    Creates a new Reads, which first transforms the input JSON using the given tranformer, and then it executes this Reads on the pre-processed JSON.

    Definition Classes
    Reads
  27. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. def transform(transformer: Writes[JsValue]): Writes[A]

    Transforms the resulting JsValue using a Writes[JsValue].

    Transforms the resulting JsValue using a Writes[JsValue].

    Definition Classes
    Writes
  30. def transform(transformer: (JsValue) => JsValue): Writes[A]

    Transforms the resulting JsValue using transformer function.

    Transforms the resulting JsValue using transformer function.

    Definition Classes
    Writes
  31. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  32. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  33. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  34. def widen[B >: A]: Reads[B]

    Widen this Reads.

    Widen this Reads.

    import play.api.libs.json.Reads
    
    sealed trait Animal
    case class Dog(name: String) extends Animal
    case class Cat(name: String) extends Animal
    
    def simple(r: Reads[Dog]): Reads[Animal] = r.widen[Animal]
    Definition Classes
    Reads

Deprecated Value Members

  1. def compose[B <: JsValue](rb: Reads[B]): Reads[A]
    Definition Classes
    Reads
    Annotations
    @deprecated
    Deprecated

    (Since version 2.7.0) Use composeWith

Inherited from Reads[A]

Inherited from Writes[A]

Inherited from AnyRef

Inherited from Any

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