blever

object SequenceFileInput {

  /** Reading in from a sequence file:
    *   - specify path to sequence file
    *   - need to specify the Writable classes that have been serialised in the sequence file
    *   - provide functions that take can get the value out of Writables, plus the WireFormat definitions of K and V; this
    *     is all implicit so that for a lot of the common cases you don't have to fill it in (it's possible that the WireFormat
    *     args could be dropped and instead derived from the Writables themselves given they implement write and readFields). */
  def fromSequenceFile[K, V, WtK <: WritableComparable, WtV <: Writable]
      (keyClass: Class[WtK], valueClass: Class[WtV], path: String)

blever

/* Something along the lines of Crunch's "Converter" but split out into separate input/output traits */
trait InputConverter[K, V, S] {
  def fromKeyValue(K key, V value): S
}

trait OutputConverter[K, V, S] {
  toKeyValue(s: S): (K, V)
}