Various improvements

src/main/java/nl/connectedit/swiss/domain/StandingsEntry.java

@@ -0,0 +1,68 @@
+package nl.connectedit.swiss.domain;
+
+import lombok.Getter;
+import lombok.Setter;
+import lombok.ToString;
+import nl.connectedit.swiss.domain.entity.Team;
+
+@Getter
+@Setter
+@ToString
+public class StandingsEntry {
+
+  public StandingsEntry(Team team) {
+    this.team = team;
+  }
+
+  private Long position;
+
+  private Team team;
+
+  private Long played = 0L;
+
+  private Long won = 0L;
+
+  private Long lost = 0L;
+
+  private Long points = 0L;
+
+  private Long gamesWon = 0L;
+
+  private Long gamesLost = 0L;
+
+  private Long pointsWon = 0L;
+
+  private Long pointsLost = 0L;
+
+  public static int compare(StandingsEntry s1, StandingsEntry s2) {
+    var pointsPerMatchS1 = safeDivide(s1.points, s1.played);
+    var pointsPerMatchS2 = safeDivide(s2.points, s2.played);
+    if (pointsPerMatchS1 > pointsPerMatchS2) {
+      return -1;
+    } else if (pointsPerMatchS1 < pointsPerMatchS2) {
+      return 1;
+    } else {
+      if (s1.played < s2.played) {
+        return -1;
+      } else if (s1.played > s2.played) {
+        return 1;
+      } else {
+        var gamesPerMatchS1 = safeDivide(s1.gamesWon - s1.gamesLost, s1.played);
+        var gamesPerMatchS2 = safeDivide(s2.gamesWon - s2.gamesLost, s2.played);
+        if (gamesPerMatchS1 > gamesPerMatchS2) {
+          return -1;
+        } else if (gamesPerMatchS1 < gamesPerMatchS2) {
+          return 1;
+        } else {
+          var ptsPerMatchS1 = safeDivide(s1.pointsWon - s1.pointsLost, s1.played);
+          var ptsPerMatchS2 = safeDivide(s2.pointsWon - s2.pointsLost, s2.played);
+          return Double.compare(ptsPerMatchS2, ptsPerMatchS1);
+        }
+      }
+    }
+  }
+
+  private static double safeDivide(Long a, Long b) {
+    return (a == 0 && b == 0) ? 0 : (double) a / b;
+  }
+}