Trait/Object

play.api.libs.json

Reads

Related Docs: object Reads | package json

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trait Reads[A] extends AnyRef

A Reads object describes how to decode JSON into a value. Reads objects are typically provided as implicit values. When Reads implicit values are in scope, a program is able to deserialize JSON into values of the right type.

The inverse of a Reads object is a Writes object, which describes how to encode a value into JSON. If you combine a Reads and a Writes then you get a Format.

Self Type
Reads[A]
Annotations
@implicitNotFound( ... )
Source
Reads.scala
Linear Supertypes
AnyRef, Any
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Abstract Value Members

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

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    Convert the JsValue into a A

Concrete Value Members

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

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. def andThen[B](rb: Reads[B])(implicit witness: <:<[A, JsValue]): Reads[B]

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  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  6. def clone(): AnyRef

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    Attributes
    protected[java.lang]
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    AnyRef
    Annotations
    @throws( ... )
  7. def collect[B](error: JsonValidationError)(f: PartialFunction[A, B]): Reads[B]

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  8. def compose[B <: JsValue](rb: Reads[B]): Reads[A]

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

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    Definition Classes
    AnyRef
  10. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  11. def filter(error: JsonValidationError)(f: (A) ⇒ Boolean): Reads[A]

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  12. def filter(f: (A) ⇒ Boolean): Reads[A]

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  13. def filterNot(error: JsonValidationError)(f: (A) ⇒ Boolean): Reads[A]

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  14. def filterNot(f: (A) ⇒ Boolean): Reads[A]

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  15. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  16. def flatMap[B](f: (A) ⇒ Reads[B]): Reads[B]

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

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    Definition Classes
    AnyRef → Any
  18. def hashCode(): Int

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    Definition Classes
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  19. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  20. def map[B](f: (A) ⇒ B): Reads[B]

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    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

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

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    Definition Classes
    AnyRef
  22. final def notify(): Unit

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    Definition Classes
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  23. final def notifyAll(): Unit

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    Definition Classes
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  24. def orElse(v: Reads[A]): Reads[A]

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    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.

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

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    Definition Classes
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  26. def toString(): String

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    Definition Classes
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  27. final def wait(): Unit

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    Definition Classes
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    Annotations
    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
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    Annotations
    @throws( ... )
  29. final def wait(arg0: Long): Unit

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    @throws( ... )

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