From ceaf7ec7f339b29eaa272421c8bbf09662fd2544 Mon Sep 17 00:00:00 2001
From: Jim Balhoff <jim@balhoff.org>
Date: Thu, 10 Nov 2022 21:50:10 -0500
Subject: [PATCH] Cleanup.

---
 .../org/renci/relationgraph/LongestFirstPrefixMapping.scala  | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cli/src/main/scala/org/renci/relationgraph/LongestFirstPrefixMapping.scala b/cli/src/main/scala/org/renci/relationgraph/LongestFirstPrefixMapping.scala
index 06aafe6..09bc1f0 100644
--- a/cli/src/main/scala/org/renci/relationgraph/LongestFirstPrefixMapping.scala
+++ b/cli/src/main/scala/org/renci/relationgraph/LongestFirstPrefixMapping.scala
@@ -1,10 +1,11 @@
 package org.renci.relationgraph
 
-case class LongestFirstPrefixMapping(prefixToNS: Map[String, String], oboPrefixes: Boolean) {
+final case class LongestFirstPrefixMapping(prefixToNS: Map[String, String], oboPrefixes: Boolean) {
 
   private val nsToPrefix = prefixToNS.toList
-    .map { case (prefix, ns) => (ns, prefix) }
+    .map(_.swap)
     .sortBy { case (ns, _) => -ns.length }
+
   private val oboNS = "http://purl.obolibrary.org/obo/"
 
   def compactOpt(uri: String): Option[String] = {