Data.Hadoop.Writable

Documentation

class (Collection a ~ c a) => Writable c a where

Equivalent to the java interface org.apache.hadoop.io.Writable. All serializable key or value types in the Hadoop Map-Reduce framework implement this interface.

Methods

javaType :: a -> T.Text

Gets the package qualified name of a in Java land. Does not inspect the value of a, simply uses it for type information.

decoder :: Decoder (c a)

Gets a decoder for this writable type.

Instances

Writable V.Vector B.ByteString

Writable V.Vector T.Text

Writable U.Vector Double

Writable U.Vector Float

Writable U.Vector Int16

Writable U.Vector Int32

Writable U.Vector Int64

Writable U.Vector ()

type family Collection a

Instances

type Collection Double = U.Vector Double

type Collection Float = U.Vector Float

type Collection Int16 = U.Vector Int16

type Collection Int32 = U.Vector Int32

type Collection Int64 = U.Vector Int64

type Collection () = U.Vector ()

type Collection B.ByteString = V.Vector B.ByteString

type Collection T.Text = V.Vector T.Text

data Decoder a

A specialized decoder for different types of writable.

Constructors

Variable (B.ByteString -> U.Vector Int -> a)

The slowest. Variable length data.

LE16 (B.ByteString -> a)

All values are 16-bit little endian.

LE32 (B.ByteString -> a)

All values are 32-bit little endian.

LE64 (B.ByteString -> a)

All values are 64-bit little endian.

BE16 (B.ByteString -> a)

All values are 16-bit big endian.

BE32 (B.ByteString -> a)

All values are 32-bit big endian.

BE64 (B.ByteString -> a)

All values are 64-bit big endian.

Instances

Functor Decoder

split :: G.Vector v a => (B.ByteString -> a) -> B.ByteString -> U.Vector Int -> v a

vintSize :: Word8 -> Int

bytesToVector :: forall a. (Storable a, U.Unbox a) => B.ByteString -> U.Vector a