Trait/Object

com.twitter.scalding

TupleSetter

Related Docs: object TupleSetter | package scalding

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trait TupleSetter[T] extends Serializable with TupleArity

Typeclass to represent converting back to (setting into) a cascading Tuple This looks like it can be contravariant, but it can't because of our approach of falling back to the singleSetter, you really want the most specific setter you can get. Put more directly: a TupleSetter[Any] is not just as good as TupleSetter[(Int, Int)] from the scalding DSL's point of view. The latter will flatten the (Int, Int), but the former won't.

Self Type
TupleSetter[T]
Source
TupleSetter.scala
Linear Supertypes
TupleArity, Serializable, AnyRef, Any
Known Subclasses
Type Hierarchy
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Inherited
  1. TupleSetter
  2. TupleArity
  3. Serializable
  4. AnyRef
  5. Any
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Visibility
  1. Public
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Abstract Value Members

  1. abstract def apply(arg: T): Tuple

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  2. abstract def arity: Int

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    Return the arity of product types, should probably only be used implicitly The use case here is to see how many fake field names we need in Cascading to hold an intermediate value for mapReduceMap

    Return the arity of product types, should probably only be used implicitly The use case here is to see how many fake field names we need in Cascading to hold an intermediate value for mapReduceMap

    Definition Classes
    TupleArity

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. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  5. def assertArityMatches(f: Fields): Unit

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    assert that the arity of this setter matches the fields given.

    assert that the arity of this setter matches the fields given. if arity == -1, we can't check, and if Fields is not a definite size, (such as Fields.ALL), we also cannot check, so this should only be considered a weak check.

    Definition Classes
    TupleArity
  6. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. def contraMap[U](fn: (U) ⇒ T): TupleSetter[U]

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

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

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    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]

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

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    Definition Classes
    AnyRef → Any
  13. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  14. final def ne(arg0: AnyRef): Boolean

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

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    Definition Classes
    AnyRef
  16. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  17. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  18. def toString(): String

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    Definition Classes
    AnyRef → Any
  19. final def wait(): Unit

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

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from TupleArity

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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