s_mach.datadiff.SeqPatch.scala Maven / Gradle / Ivy

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         .t1i .,::;;; ;1tt        Copyright (c) 2014 S-Mach, Inc.
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package s_mach.datadiff

/**
 * A case class for a patch against a sequence of values
 *
 * Note: the current representation is based on
 * https://code.google.com/p/java-diff-utils/ which is used internally to
 * generate and apply patches. It stores the previous value as part of the
 * patch, unlike all other patch types. The original value will eventually be
 * removed in a later version and should not be used.
 *
 * @param zomDelta zero or more deltas
 * @tparam A the value type
 */
case class SeqPatch[+A](zomDelta: Vector[SeqPatch.Delta[A]])

object SeqPatch {
  case class Chunk[+A](position: Int, lines: Vector[A])

  sealed trait DeltaType
  case object Insert extends DeltaType
  case object Change extends DeltaType
  case object Delete extends DeltaType

  case class Delta[+A](
    _type: DeltaType,
    @deprecated("do not use","1.0.0") original: Chunk[A],
    revised: Chunk[A]
  )

  val noChange = SeqPatch(Vector.empty)
}