From c0ff2852684b2804d4805dcf27590bddbf30cf59 Mon Sep 17 00:00:00 2001
From: Claus Stadler <RavenArkadon@googlemail.com>
Date: Mon, 23 Sep 2024 18:07:05 +0200
Subject: [PATCH] Added comparator to AllenRelations.

---
 .../org/aksw/commons/algebra/allen/AllenRelations.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/aksw-commons-algebra-parent/aksw-commons-algebra-allen-interval/src/main/java/org/aksw/commons/algebra/allen/AllenRelations.java b/aksw-commons-algebra-parent/aksw-commons-algebra-allen-interval/src/main/java/org/aksw/commons/algebra/allen/AllenRelations.java
index 86b51933..2a7de55d 100644
--- a/aksw-commons-algebra-parent/aksw-commons-algebra-allen-interval/src/main/java/org/aksw/commons/algebra/allen/AllenRelations.java
+++ b/aksw-commons-algebra-parent/aksw-commons-algebra-allen-interval/src/main/java/org/aksw/commons/algebra/allen/AllenRelations.java
@@ -28,6 +28,16 @@ public static <T extends Comparable<T>> AllenRelation compute(Range<T> x, Range<
         return AllenRelation.of(pattern);
     }
 
+    /** A comparator that returns 0 when the argument ranges overlap, -1 if the first argument is before the other one, and 1 otherwise. */
+    public static <T extends Comparable<T>> int compare(Range<T> x, Range<T> y) {
+        int result = isBefore(x, y)
+                ? -1
+                : isAfter(x, y)
+                    ? 1
+                    : 0;
+        return result;
+    }
+
     /** is strictly before (not meeting) */
     public static <T extends Comparable<T>> boolean isBefore(Range<T> x, Range<T> y) {
         boolean result =