Add methods to use arbitrary entries in scoreboards. Adds BUKKIT-3977

src/main/java/org/bukkit/craftbukkit/scoreboard/CraftObjective.java

@@ -93,6 +93,13 @@ final class CraftObjective extends CraftScoreboardComponent implements Objective
         return new CraftScore(this, player.getName());
     }
 
+    public Score getScore(String entry) throws IllegalArgumentException, IllegalStateException {
+        Validate.notNull(entry, "Entry cannot be null");
+        CraftScoreboard scoreboard = checkState();
+
+        return new CraftScore(this, entry);
+    }
+
     @Override
     public void unregister() throws IllegalStateException {
         CraftScoreboard scoreboard = checkState();

src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScore.java

@@ -17,16 +17,20 @@ import org.bukkit.scoreboard.Score;
  * Also, as an added perk, a CraftScore will (intentionally) stay a valid reference so long as objective is valid.
  */
 final class CraftScore implements Score {
-    private final String playerName;
+    private final String entry;
     private final CraftObjective objective;
 
-    CraftScore(CraftObjective objective, String playerName) {
+    CraftScore(CraftObjective objective, String entry) {
         this.objective = objective;
-        this.playerName = playerName;
+        this.entry = entry;
     }
 
     public OfflinePlayer getPlayer() {
-        return Bukkit.getOfflinePlayer(playerName);
+        return Bukkit.getOfflinePlayer(entry);
+    }
+
+    public String getEntry() {
+        return entry;
     }
 
     public Objective getObjective() {
@@ -36,18 +40,19 @@ final class CraftScore implements Score {
     public int getScore() throws IllegalStateException {
         Scoreboard board = objective.checkState().board;
 
-        if (board.getPlayers().contains(playerName)) { // Lazy
+        if (board.getPlayers().contains(entry)) { // Lazy
-            Map<String, ScoreboardScore> scores = board.getPlayerObjectives(playerName);
+            Map<String, ScoreboardScore> scores = board.getPlayerObjectives(entry);
             ScoreboardScore score = scores.get(objective.getHandle());
             if (score != null) { // Lazy
                 return score.getScore();
             }
         }
+
         return 0; // Lazy
     }
 
     public void setScore(int score) throws IllegalStateException {
-        objective.checkState().board.getPlayerScoreForObjective(playerName, objective.getHandle()).setScore(score);
+        objective.checkState().board.getPlayerScoreForObjective(entry, objective.getHandle()).setScore(score);
     }
 
     public CraftScoreboard getScoreboard() {

src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java

@@ -84,12 +84,28 @@ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
         return scores.build();
     }
 
+    public ImmutableSet<Score> getScores(String entry) throws IllegalArgumentException {
+        Validate.notNull(entry, "Entry cannot be null");
+
+        ImmutableSet.Builder<Score> scores = ImmutableSet.builder();
+        for (CraftObjective objective : objectives.values()) {
+            scores.add(objective.getScore(entry));
+        }
+        return scores.build();
+    }
+
     public void resetScores(OfflinePlayer player) throws IllegalArgumentException {
         Validate.notNull(player, "OfflinePlayer cannot be null");
 
         board.resetPlayerScores(player.getName());
     }
 
+    public void resetScores(String entry) throws IllegalArgumentException {
+        Validate.notNull(entry, "Entry cannot be null");
+
+        board.resetPlayerScores(entry);
+    }
+
     public Team getPlayerTeam(OfflinePlayer player) throws IllegalArgumentException {
         Validate.notNull(player, "OfflinePlayer cannot be null");
 
@@ -123,6 +139,14 @@ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
         return players.build();
     }
 
+    public ImmutableSet<String> getEntries() {
+        ImmutableSet.Builder<String> entries = ImmutableSet.builder();
+        for (Object entry : board.getPlayers()) {
+            entries.add(entry.toString());
+        }
+        return entries.build();
+    }
+
     public void clearSlot(DisplaySlot slot) throws IllegalArgumentException {
         Validate.notNull(slot, "Slot cannot be null");
         board.setDisplaySlot(CraftScoreboardTranslations.fromBukkitSlot(slot), null);