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/* Title: Pure/General/properties.scala
Author: Makarius
Property lists.
*/
package isabelle
object Properties
{
/* entries */
type Entry = (java.lang.String, java.lang.String)
type T = List[Entry]
def defined(props: T, name: java.lang.String): java.lang.Boolean =
props.exists({ case (x, _) => x == name })
def get(props: T, name: java.lang.String): Option[java.lang.String] =
props.collectFirst({ case (x, y) if x == name => y })
def put(props: T, entry: Entry): T =
{
val (x, y) = entry
def update(ps: T): T =
ps match {
case (p @ (x1, _)) :: rest =>
if (x1 == x) (x1, y) :: rest else p :: update(rest)
case Nil => Nil
}
if (defined(props, x)) update(props) else entry :: props
}
/* external storage */
def encode(ps: T): Bytes = Bytes(YXML.string_of_body(XML.Encode.properties(ps)))
def decode(bs: Bytes, cache: XML.Cache = XML.Cache.none): T =
cache.props(XML.Decode.properties(YXML.parse_body(bs.text)))
def compress(ps: List[T],
options: XZ.Options = XZ.options(),
cache: XZ.Cache = XZ.Cache()): Bytes =
{
if (ps.isEmpty) Bytes.empty
else {
Bytes(YXML.string_of_body(XML.Encode.list(XML.Encode.properties)(ps))).
compress(options = options, cache = cache)
}
}
def uncompress(bs: Bytes, cache: XML.Cache = XML.Cache.none): List[T] =
{
if (bs.is_empty) Nil
else {
val ps =
XML.Decode.list(XML.Decode.properties)(
YXML.parse_body(bs.uncompress(cache = cache.xz).text))
if (cache.no_cache) ps else ps.map(cache.props)
}
}
/* multi-line entries */
def encode_lines(props: T): T = props.map({ case (a, b) => (a, Library.encode_lines(b)) })
def decode_lines(props: T): T = props.map({ case (a, b) => (a, Library.decode_lines(b)) })
def lines_nonempty(x: java.lang.String, ys: List[java.lang.String]): Properties.T =
if (ys.isEmpty) Nil else List((x, cat_lines(ys)))
/* entry types */
class String(val name: java.lang.String)
{
def apply(value: java.lang.String): T = List((name, value))
def unapply(props: T): Option[java.lang.String] =
props.find(_._1 == name).map(_._2)
def get(props: T): java.lang.String = unapply(props).getOrElse("")
}
class Boolean(val name: java.lang.String)
{
def apply(value: scala.Boolean): T = List((name, Value.Boolean(value)))
def unapply(props: T): Option[scala.Boolean] =
props.find(_._1 == name) match {
case None => None
case Some((_, value)) => Value.Boolean.unapply(value)
}
def get(props: T): scala.Boolean = unapply(props).getOrElse(false)
}
class Int(val name: java.lang.String)
{
def apply(value: scala.Int): T = List((name, Value.Int(value)))
def unapply(props: T): Option[scala.Int] =
props.find(_._1 == name) match {
case None => None
case Some((_, value)) => Value.Int.unapply(value)
}
def get(props: T): scala.Int = unapply(props).getOrElse(0)
}
class Long(val name: java.lang.String)
{
def apply(value: scala.Long): T = List((name, Value.Long(value)))
def unapply(props: T): Option[scala.Long] =
props.find(_._1 == name) match {
case None => None
case Some((_, value)) => Value.Long.unapply(value)
}
def get(props: T): scala.Long = unapply(props).getOrElse(0)
}
class Double(val name: java.lang.String)
{
def apply(value: scala.Double): T = List((name, Value.Double(value)))
def unapply(props: T): Option[scala.Double] =
props.find(_._1 == name) match {
case None => None
case Some((_, value)) => Value.Double.unapply(value)
}
def get(props: T): scala.Double = unapply(props).getOrElse(0.0)
}
}
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