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adilakhter/QueryOperatorDef.scala

Created April 9, 2014 15:36
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QueryOperatorDef.scala
lazy val queryOperationDef: PackratParser[Seq[Expression]] =
"?" ~> repsep(filter | select | top | skip | orderBy, "&")
lazy val filter: PackratParser[Expression] =
"$filter" ~> "=" ~> predicate ^^ Filter
lazy val top: PackratParser[Expression] =
"$top" ~> "=" ~> number ^^ Top
lazy val skip: PackratParser[Expression] =
"$skip" ~> "=" ~> number ^^ Skip
lazy val orderBy: PackratParser[Expression] = (
"$orderby" ~> "="~> propertyList <~ "asc" ^^ OrderByAsc
| "$orderby" ~> "="~> propertyList <~ "desc" ^^ OrderByDesc
| "$orderby" ~> "="~> propertyList ^^ OrderByAsc
)
lazy val select: PackratParser[Expression] =
"$select"~>"="~> propertyList ^^ Select
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