Create a separate comparator for Hit class to enable sorting by phi, as it can't be done within the class itself.

Author: mathieuouillon

reconstruction/alert/src/main/java/org/jlab/rec/ahdc/AI/PreClustering.java

@@ -32,14 +32,21 @@ public ArrayList<PreCluster> find_preclusters_for_AI(List<Hit> AHDC_hits) {
         ArrayList<Hit> s5l1 = fill(AHDC_hits, 5, 1);
 
         // Sort hits of each layers by phi:
-        s1l1.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s2l1.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s2l2.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s3l1.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s3l2.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s4l1.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s4l2.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
-        s5l1.sort(new Comparator<Hit>() {@Override public int compare(Hit a1, Hit a2) {return Double.compare(a1.getPhi(), a2.getPhi());}});
+        Comparator<Hit> comparator = new Comparator<>() {
+            @Override
+            public int compare(Hit a1, Hit a2) {
+                return Double.compare(a1.getPhi(), a2.getPhi());
+            }
+        };
+
+        s1l1.sort(comparator);
+        s2l1.sort(comparator);
+        s2l2.sort(comparator);
+        s3l1.sort(comparator);
+        s3l2.sort(comparator);
+        s4l1.sort(comparator);
+        s4l2.sort(comparator);
+        s5l1.sort(comparator);
 
         ArrayList<ArrayList<Hit>> all_super_layer = new ArrayList<>(Arrays.asList(s1l1, s2l1, s2l2, s3l1, s3l2, s4l1, s4l2, s5l1));