Added getTopRatings(), moved constants into RatingCodes.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@451 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/parlor/rating/data/RatingCodes.java

@@ -0,0 +1,37 @@
+//
+// $Id$
+//
+// Vilya library - tools for developing networked games
+// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/vilya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.parlor.rating.data;
+
+/**
+ * Constants relating to the rating services.
+ */
+public interface RatingCodes
+{
+    /** The minimum rating value. */
+    public static final int MINIMUM_RATING = 1000;
+
+    /** The default rating value. */
+    public static final int DEFAULT_RATING = 1200;
+
+    /** The maximum rating value. */
+    public static final int MAXIMUM_RATING = 3000;
+}

src/java/com/threerings/parlor/rating/server/RatingManagerDelegate.java

@@ -50,6 +50,7 @@ import com.threerings.parlor.game.data.GameObject;
 import com.threerings.parlor.game.server.GameManager;
 import com.threerings.parlor.game.server.GameManagerDelegate;
 
+import com.threerings.parlor.rating.data.RatingCodes;
 import com.threerings.parlor.rating.server.persist.RatingRecord;
 import com.threerings.parlor.rating.server.persist.RatingRepository;
 
@@ -57,16 +58,8 @@ import com.threerings.parlor.rating.server.persist.RatingRepository;
  * Rates players after each game and handles persisting the results.
  */
 public abstract class RatingManagerDelegate extends GameManagerDelegate
+    implements RatingCodes
 {
-    /** The minimum rating value. */
-    public static final int MINIMUM_RATING = 1000;
-
-    /** The default rating value. */
-    public static final int DEFAULT_RATING = 1200;
-
-    /** The maximum rating value. */
-    public static final int MAXIMUM_RATING = 3000;
-
     /**
      * Constructs a rating manager delegate.
      */

src/java/com/threerings/parlor/rating/server/persist/RatingRepository.java

@@ -31,6 +31,7 @@ import java.util.Set;
 import com.samskivert.io.PersistenceException;
 import com.samskivert.util.HashIntMap;
 import com.samskivert.util.IntMap;
+import com.samskivert.util.IntSet;
 
 import com.samskivert.jdbc.depot.DepotRepository;
 import com.samskivert.jdbc.depot.EntityMigration;
@@ -40,6 +41,7 @@ import com.samskivert.jdbc.depot.clause.Limit;
 import com.samskivert.jdbc.depot.clause.OrderBy;
 import com.samskivert.jdbc.depot.clause.QueryClause;
 import com.samskivert.jdbc.depot.clause.Where;
+import com.samskivert.jdbc.depot.expression.SQLExpression;
 import com.samskivert.jdbc.depot.operator.Conditionals.*;
 import com.samskivert.jdbc.depot.operator.Logic.And;
 
@@ -56,11 +58,6 @@ public class RatingRepository extends DepotRepository
     public RatingRepository (PersistenceContext ctx)
     {
         super(ctx);
-
-        // TEMP
-        ctx.registerMigration(PercentileRecord.class, new EntityMigration.Retype(2, "data"));
-        ctx.registerMigration(PercentileRecord.class, new EntityMigration.Drop(3, "type"));
-        // END TEMP
     }
 
     /**
@@ -115,6 +112,30 @@ public class RatingRepository extends DepotRepository
         return findAll(RatingRecord.class, clauses.toArray(new QueryClause[clauses.size()]));
     }
 
+    /**
+     * Returns the top-ratings for the specified game. Players with equal rating will be sorted
+     * most recently played first.
+     *
+     * @param playerIds an optional list of player ids to which to limit the top-rankings search.
+     */
+    public List<RatingRecord> getTopRatings (int gameId, int limit, IntSet playerIds)
+        throws PersistenceException
+    {
+        ArrayList<QueryClause> clauses = new ArrayList<QueryClause>();
+        if (playerIds == null) {
+            clauses.add(new Where(RatingRecord.GAME_ID_C, gameId));
+        } else {
+            Integer[] pids = playerIds.toArray(new Integer[playerIds.size()]);
+            clauses.add(new Where(new And(new Equals(RatingRecord.GAME_ID_C, gameId),
+                                          new In(RatingRecord.PLAYER_ID_C, pids))));
+        }
+        clauses.add(new Limit(0, limit));
+        clauses.add(new OrderBy(
+                        new SQLExpression[] { RatingRecord.RATING_C, RatingRecord.LAST_UPDATED_C },
+                        new OrderBy.Order[] { OrderBy.Order.DESC, OrderBy.Order.DESC }));
+        return findAll(RatingRecord.class, clauses.toArray(new QueryClause[clauses.size()]));
+    }
+
     /**
      * Set the rating and experience for a given player and game. This method will either update
      * or create a row.