[Polycasso-commit] SF.net SVN: polycasso:[68] trunk/polycasso/src/com/mebigfatguy/polycasso/ ImprovementTypeStats.java

[<dbr...@us...>]

Revision: 68
          http://polycasso.svn.sourceforge.net/polycasso/?rev=68&view=rev
Author:   dbrosius
Date:     2009-11-27 02:02:43 +0000 (Fri, 27 Nov 2009)

Log Message:
-----------
on a large run of failures, reset the stats to reset the randomness of picking improvements

Modified Paths:
--------------
    trunk/polycasso/src/com/mebigfatguy/polycasso/ImprovementTypeStats.java

Modified: trunk/polycasso/src/com/mebigfatguy/polycasso/ImprovementTypeStats.java
===================================================================
--- trunk/polycasso/src/com/mebigfatguy/polycasso/ImprovementTypeStats.java	2009-11-27 00:07:37 UTC (rev 67)
+++ trunk/polycasso/src/com/mebigfatguy/polycasso/ImprovementTypeStats.java	2009-11-27 02:02:43 UTC (rev 68)
@@ -29,6 +29,7 @@
  */
 public class ImprovementTypeStats {
 	
+	private static final int MAX_FAILURE_RUN = 50;
 	private static class Stats {
 		public int successes = 1;
 		public int totals = 1;
@@ -42,6 +43,7 @@
 	
 	private Map<ImprovementType, Stats> typeStats = new EnumMap<ImprovementType, Stats>(ImprovementType.class);
 	private Random r = new Random();
+	private int failureRun;
 	
 	/**
 	 * creates an initial state of statistics
@@ -61,6 +63,10 @@
 		if (successful)
 			stats.successes++;
 		stats.totals++;
+		failureRun = successful ? 0 : failureRun + 1;
+		if (failureRun > MAX_FAILURE_RUN) {
+			initStats();
+		}
 	}
 	
 	/**
@@ -98,5 +104,6 @@
 		for (ImprovementType type : values) {
 			typeStats.put(type, new Stats());
 		}
+		failureRun = 0;
 	}
 }


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