spray.json.lenses

ReadLens

trait ReadLens[M[_]] extends AnyRef

The read lens can extract child values out of a JsValue hierarchy. A read lens is parameterized with a type constructor. This allows to extracts not only scalar values but also sequences or optional values.

M

Linear Supertypes
AnyRef, Any
Known Subclasses
Lens, LensImpl
Ordering
  1. Alphabetic
  2. By inheritance
Inherited
  1. ReadLens
  2. AnyRef
  3. Any
  1. Hide All
  2. Show all
Learn more about member selection
Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def get[T](value: JsValue)(implicit arg0: Reader[T]): M[T]

    Given a parent JsValue extracts and converts a JsValue into a value of type T or throws an exception.

  2. abstract def is[U](f: (U) ⇒ Boolean)(implicit arg0: Reader[U]): JsPred

    Lifts a predicate for a converted value for this lens up to the parent level.

    Lifts a predicate for a converted value for this lens up to the parent level. The returned predicate will return false for values which fail to read.

  3. abstract def retr: (JsValue) ⇒ Validated[M[JsValue]]

    Given a parent JsValue, tries to extract the child value.

    Given a parent JsValue, tries to extract the child value.

    returns

    Right(value) if the lens read succeeds. Left(error) if the lens read fails.

  4. abstract def tryGet[T](value: JsValue)(implicit arg0: Reader[T]): Validated[M[T]]

    Given a parent JsValue extracts and tries to convert the JsValue into a value of type T

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. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  5. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef

  7. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  8. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

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

    Definition Classes
    AnyRef → Any

  10. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  11. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

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

    Definition Classes
    AnyRef

  13. final def notify(): Unit

    Definition Classes
    AnyRef

  14. final def notifyAll(): Unit

    Definition Classes
    AnyRef

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

    Definition Classes
    AnyRef

  16. def toString(): String

    Definition Classes
    AnyRef → Any

  17. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from AnyRef

Inherited from Any

Ungrouped