def getSuggestions()

in driver/src/main/scala/com/datastax/spark/connector/util/NameTools.scala [91:126]
25 lines of code
17 McCabe index (conditional complexity)

  def getSuggestions(clusterMetadata: Metadata, keyspace: String, table: String): Option[Suggestions] = {

    val keyspaceScores = clusterMetadata
      .getKeyspaces
      .values().asScala
      .toSeq
      .map(ks =>
      (ks, StringUtils.getJaroWinklerDistance(toName(ks.getName).toLowerCase(Locale.ROOT), keyspace.toLowerCase(Locale.ROOT))))

    val ktScores = for ((ks, ksScore) <- keyspaceScores; (_, t) <- (ks.getTables.asScala ++ ks.getViews.asScala)) yield {
      val tScore = StringUtils.getJaroWinklerDistance(toName(t.getName).toLowerCase(Locale.ROOT), table.toLowerCase(Locale.ROOT))
      (toName(ks.getName), toName(t.getName), ksScore, tScore)
    }

    //1. Perfect match on keyspace, fuzzy match on table
    val suggestedTables = ktScores
      .collect { case (ks, t, ksScore, tScore) if ks == keyspace && tScore > MinJWScore => t}

    //2. Fuzzy match on table, perfect match on table
    val suggestedKeyspaces = ktScores
      .collect { case (ks, t, ksScore, tScore) if ksScore > MinJWScore && t == table => ks}

    //3. Fuzzy match on keyspace, fuzzy match on table
    val suggestedKeyspaceAndTables = ktScores
      .collect { case (ks, t, ksScore, tScore) if ksScore > MinJWScore && tScore > MinJWScore => (ks, t)}

    //4. No match on keyspace, fuzzy match on table
    val suggestedTablesUnknownKeyspace = ktScores
      .collect { case (ks, t, ksScore, tScore) if tScore > MinJWScore => (ks, t)}

    if (suggestedTables.nonEmpty) Some(TableSuggestions(suggestedTables))
    else if (suggestedKeyspaces.nonEmpty) Some(KeyspaceSuggestions(suggestedKeyspaces))
    else if (suggestedKeyspaceAndTables.nonEmpty) Some(KeyspaceAndTableSuggestions(suggestedKeyspaceAndTables))
    else if (suggestedTablesUnknownKeyspace.nonEmpty) Some(KeyspaceAndTableSuggestions(suggestedTablesUnknownKeyspace))
    else None
  }