X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fanalysis%2Fscoremodels%2FScoreModels.java;h=ebc9a26d0a0c9260f9f7b9ee16a2122aec2b886a;hb=8a7a9401835f50b64bab13489de2781e8ced6ba8;hp=7262fb81925396f1ee4ce0dd5198a68f6de8ff53;hpb=f6123f656fa387e11f506dedd09672a0d0ff5ac5;p=jalview.git

diff --git a/src/jalview/analysis/scoremodels/ScoreModels.java b/src/jalview/analysis/scoremodels/ScoreModels.java
index 7262fb8..ebc9a26 100644
--- a/src/jalview/analysis/scoremodels/ScoreModels.java
+++ b/src/jalview/analysis/scoremodels/ScoreModels.java
@@ -41,12 +41,22 @@ public class ScoreModels
 
   private final ScoreMatrix DNA;
 
-  private static ScoreModels instance = new ScoreModels();
+  private static ScoreModels instance;
 
   private Map<String, ScoreModelI> models;
 
+  /**
+   * Answers the singleton instance of this class, with lazy initialisation
+   * (built-in score models are loaded on the first call to this method)
+   * 
+   * @return
+   */
   public static ScoreModels getInstance()
   {
+    if (instance == null)
+    {
+      instance = new ScoreModels();
+    }
     return instance;
   }
 
@@ -66,11 +76,11 @@ public class ScoreModels
     /*
      * using LinkedHashMap keeps models ordered as added
      */
-    models = new LinkedHashMap<String, ScoreModelI>();
+    models = new LinkedHashMap<>();
     BLOSUM62 = loadScoreMatrix("scoreModel/blosum62.scm");
     PAM250 = loadScoreMatrix("scoreModel/pam250.scm");
-    registerScoreModel(new PIDModel());
     DNA = loadScoreMatrix("scoreModel/dna.scm");
+    registerScoreModel(new PIDModel());
     registerScoreModel(new FeatureDistanceModel());
   }
 
@@ -139,6 +149,14 @@ public class ScoreModels
   }
 
   /**
+   * Resets to just the built-in score models
+   */
+  public void reset()
+  {
+    instance = new ScoreModels();
+  }
+
+  /**
    * Returns the default peptide or nucleotide score model, currently BLOSUM62
    * or DNA
    *