private def simplify()

in atlas-lwcapi/src/main/scala/com/netflix/atlas/lwcapi/ExpressionSplitter.scala [138:156]

• 19 lines of code
• 16 McCabe index (conditional complexity)

  private def simplify(query: Query): Query = {
    val newQuery = query match {
      case Query.And(Query.True, q)  => simplify(q)
      case Query.And(q, Query.True)  => simplify(q)
      case Query.Or(Query.True, _)   => Query.True
      case Query.Or(_, Query.True)   => Query.True
      case Query.And(Query.False, _) => Query.False
      case Query.And(_, Query.False) => Query.False
      case Query.Or(Query.False, q)  => simplify(q)
      case Query.Or(q, Query.False)  => simplify(q)
      case Query.And(q1, q2)         => Query.And(simplify(q1), simplify(q2))
      case Query.Or(q1, q2)          => Query.Or(simplify(q1), simplify(q2))
      case Query.Not(Query.True)     => Query.True // Not(True) needs to remain True
      case Query.Not(Query.False)    => Query.True
      case Query.Not(q)              => Query.Not(simplify(q))
      case q                         => q
    }
    if (newQuery != query) simplify(newQuery) else newQuery
  }