Author: simonetripodi
Date: Tue Mar 27 20:11:56 2012
New Revision: 1306001
URL: http://svn.apache.org/viewvc?rev=1306001&view=rev
Log:
finally found a way to arrange the ELO algorithm
Added:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultKFactorBuilder.java
- copied, changed from r1305237,
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/EloRankingCalculator.java
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
(with props)
Removed:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/EloRankingCalculator.java
Modified:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultRankingSelector.java
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/PlayersRank.java
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/RankingSelector.java
Copied:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultKFactorBuilder.java
(from r1305237,
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/EloRankingCalculator.java)
URL:
http://svn.apache.org/viewvc/commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultKFactorBuilder.java?p2=commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultKFactorBuilder.java&p1=commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/EloRankingCalculator.java&r1=1305237&r2=1306001&rev=1306001&view=diff
==============================================================================
---
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/EloRankingCalculator.java
(original)
+++
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultKFactorBuilder.java
Tue Mar 27 20:11:56 2012
@@ -23,7 +23,8 @@ import static java.lang.Math.pow;
import org.apache.commons.graph.DirectedGraph;
-final class EloRankingCalculator<P>
+final class DefaultKFactorBuilder<P>
+ implements KFactorBuilder<P>
{
private static final double DEFAULT_POW_BASE = 10;
@@ -36,30 +37,32 @@ final class EloRankingCalculator<P>
private final PlayersRank<P> playerRanking;
- private final int kFactor;
-
- public EloRankingCalculator( DirectedGraph<P, GameResult> tournamentGraph,
- PlayersRank<P> playerRanking, int kFactor )
+ public DefaultKFactorBuilder( DirectedGraph<P, GameResult> tournamentGraph,
+ PlayersRank<P> playerRanking )
{
this.tournamentGraph = tournamentGraph;
this.playerRanking = playerRanking;
- this.kFactor = kFactor;
}
- // TODO find a way to improve performances, this impl is just a spike
- public void calculateRate()
+ public void withDefaultKFactor()
+ {
+ withKFactor( DEFAULT_K_FACTOR );
+ }
+
+ public void withKFactor( int kFactor )
{
+ // TODO find a way to improve performances, this impl is just a spike
for ( P player : tournamentGraph.getVertices() )
{
for ( P opponent : tournamentGraph.getOutbound( player ) )
{
GameResult gameResult = tournamentGraph.getEdge( player,
opponent );
- evaluateMatch( player, gameResult, opponent );
+ evaluateMatch( player, gameResult, opponent, kFactor );
}
}
}
- private boolean evaluateMatch( P playerA, GameResult gameResult, P playerB
)
+ private boolean evaluateMatch( P playerA, GameResult gameResult, P
playerB, int kFactor )
{
double qA = calculateQFactor( playerA );
double qB = calculateQFactor( playerB );
@@ -92,7 +95,7 @@ final class EloRankingCalculator<P>
private double calculateQFactor( P player )
{
- double ranking = playerRanking.map( player );
+ double ranking = playerRanking.getRanking( player );
return pow( DEFAULT_POW_BASE, ranking / DEFAULT_DIVISOR);
}
@@ -103,8 +106,8 @@ final class EloRankingCalculator<P>
private void updateRanking( P player, double kFactor, double sFactor,
double eFactor )
{
- double newRanking = playerRanking.map( player ) + ( kFactor * (
sFactor - eFactor ) );
- playerRanking.update( player, newRanking );
+ double newRanking = playerRanking.getRanking( player ) + ( kFactor * (
sFactor - eFactor ) );
+ playerRanking.updateRanking( player, newRanking );
}
}
Modified:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultRankingSelector.java
URL:
http://svn.apache.org/viewvc/commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultRankingSelector.java?rev=1306001&r1=1306000&r2=1306001&view=diff
==============================================================================
---
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultRankingSelector.java
(original)
+++
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/DefaultRankingSelector.java
Tue Mar 27 20:11:56 2012
@@ -34,9 +34,10 @@ public final class DefaultRankingSelecto
this.tournamentGraph = tournamentGraph;
}
- public void werePlayersArRankedIn( PlayersRank<P> playersRank )
+ public KFactorBuilder<P> werePlayersArRankedIn( PlayersRank<P> playersRank
)
{
playersRank = checkNotNull( playersRank, "ELO ranking can not be
applied if players can not be ranked!" );
+ return new DefaultKFactorBuilder<P>( tournamentGraph, playersRank );
}
}
Added:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
URL:
http://svn.apache.org/viewvc/commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java?rev=1306001&view=auto
==============================================================================
---
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
(added)
+++
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
Tue Mar 27 20:11:56 2012
@@ -0,0 +1,29 @@
+package org.apache.commons.graph.elo;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+public interface KFactorBuilder<P>
+{
+
+ void withDefaultKFactor();
+
+ void withKFactor( int kFactor );
+
+}
Propchange:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
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svn:eol-style = native
Propchange:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
------------------------------------------------------------------------------
svn:keywords = Date Author Id Revision HeadURL
Propchange:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/KFactorBuilder.java
------------------------------------------------------------------------------
svn:mime-type = text/plain
Modified:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/PlayersRank.java
URL:
http://svn.apache.org/viewvc/commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/PlayersRank.java?rev=1306001&r1=1306000&r2=1306001&view=diff
==============================================================================
---
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/PlayersRank.java
(original)
+++
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/PlayersRank.java
Tue Mar 27 20:11:56 2012
@@ -19,12 +19,11 @@ package org.apache.commons.graph.elo;
* under the License.
*/
-import org.apache.commons.graph.Mapper;
-
public interface PlayersRank<P>
- extends Mapper<P, Double>
{
- void update( P player, Double ranking );
+ Double getRanking( P player );
+
+ void updateRanking( P player, Double ranking );
}
Modified:
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/RankingSelector.java
URL:
http://svn.apache.org/viewvc/commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/RankingSelector.java?rev=1306001&r1=1306000&r2=1306001&view=diff
==============================================================================
---
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/RankingSelector.java
(original)
+++
commons/sandbox/graph/trunk/src/main/java/org/apache/commons/graph/elo/RankingSelector.java
Tue Mar 27 20:11:56 2012
@@ -22,6 +22,6 @@ package org.apache.commons.graph.elo;
public interface RankingSelector<P>
{
- void werePlayersArRankedIn( PlayersRank<P> playersRank );
+ KFactorBuilder<P> werePlayersArRankedIn( PlayersRank<P> playersRank );
}
