trait RowDecoderF[H[+a] <: Option[a], T, Header] extends AnyRef
Describes how a row can be decoded to the given type.
RowDecoderF provides convenient methods such as map, emap, or flatMap
to build new decoders out of more basic one.
Actually, RowDecoderF has a cats MonadError
instance. To get the full power of it, import cats.syntax.all._.
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- @FunctionalInterface()
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- RowDecoderF.scala
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- RowDecoderF
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- abstract def apply(row: RowF[H, Header]): DecoderResult[T]
Concrete Value Members
- final def !=(arg0: Any): Boolean
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- @throws(classOf[java.lang.CloneNotSupportedException]) @native()
- def either[B](cd: RowDecoderF[H, B, Header]): RowDecoderF[H, Either[T, B], Header]
Similar to or, but return the result as an Either signaling which row decoder succeeded.
Similar to or, but return the result as an Either signaling which row decoder succeeded. Allows for parsing an unrelated type in case of failure.
- B
the type the alternative decoder returns
- cd
the alternative decoder
- returns
a decoder combining both decoders
- def emap[T2](f: (T) => DecoderResult[T2]): RowDecoderF[H, T2, Header]
Map the parsed value, potentially failing.
Map the parsed value, potentially failing.
- T2
the result type
- f
the mapping function
- returns
a row decoder reading the mapped type
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- def flatMap[T2](f: (T) => RowDecoderF[H, T2, Header]): RowDecoderF[H, T2, Header]
Map the parsed value to a new decoder, which in turn will be applied to the parsed value.
Map the parsed value to a new decoder, which in turn will be applied to the parsed value.
- T2
the result type
- f
the mapping function
- returns
a row decoder reading the mapped type
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- def map[T2](f: (T) => T2): RowDecoderF[H, T2, Header]
Map the parsed value.
Map the parsed value.
- T2
the result type
- f
the mapping function
- returns
a row decoder reading the mapped type
- final def ne(arg0: AnyRef): Boolean
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- def or[TT >: T](cd: => RowDecoderF[H, TT, Header]): RowDecoderF[H, TT, Header]
Fail-over.
Fail-over. If this decoder fails, try the supplied other decoder.
- TT
the return type
- cd
the fail-over decoder
- returns
a decoder combining this and the other decoder
- final def synchronized[T0](arg0: => T0): T0
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