package sbt
import java.io.{File, FileNotFoundException}
import sbinary.{DefaultProtocol, Format, Operations}
import scala.reflect.Manifest
object CacheIO
{
def toBytes[T](format: Format[T])(value: T)(implicit mf: Manifest[Format[T]]): Array[Byte] =
toBytes[T](value)(format, mf)
def toBytes[T](value: T)(implicit format: Format[T], mf: Manifest[Format[T]]): Array[Byte] =
Operations.toByteArray(value)(stampedFormat(format))
def fromBytes[T](format: Format[T], default: => T)(bytes: Array[Byte])(implicit mf: Manifest[Format[T]]): T =
fromBytes(default)(bytes)(format, mf)
def fromBytes[T](default: => T)(bytes: Array[Byte])(implicit format: Format[T], mf: Manifest[Format[T]]): T =
if(bytes.isEmpty) default else Operations.fromByteArray(bytes)(stampedFormat(format))
def fromFile[T](format: Format[T], default: => T)(file: File)(implicit mf: Manifest[Format[T]]): T =
fromFile(file, default)(format, mf)
def fromFile[T](file: File, default: => T)(implicit format: Format[T], mf: Manifest[Format[T]]): T =
fromFile[T](file) getOrElse default
def fromFile[T](file: File)(implicit format: Format[T], mf: Manifest[Format[T]]): Option[T] =
try { Some( Operations.fromFile(file)(stampedFormat(format)) ) }
catch { case e: Exception => None }
def toFile[T](format: Format[T])(value: T)(file: File)(implicit mf: Manifest[Format[T]]): Unit =
toFile(value)(file)(format, mf)
def toFile[T](value: T)(file: File)(implicit format: Format[T], mf: Manifest[Format[T]]): Unit =
{
IO.createDirectory(file.getParentFile)
Operations.toFile(value)(file)(stampedFormat(format))
}
def stampedFormat[T](format: Format[T])(implicit mf: Manifest[Format[T]]): Format[T] =
{
import DefaultProtocol._
withStamp(stamp(format))(format)
}
def stamp[T](format: Format[T])(implicit mf: Manifest[Format[T]]): Int = typeHash(mf)
def typeHash[T](implicit mf: Manifest[T]) = mf.toString.hashCode
def manifest[T](implicit mf: Manifest[T]): Manifest[T] = mf
def objManifest[T](t: T)(implicit mf: Manifest[T]): Manifest[T] = mf
}