[DL-Learner SVN] SF.net SVN: dl-learner:[4128] trunk/components-core/src/main/java/org/ dllearner/algorithms/isle/VSMCosineDocumentSimilarity.java

[<dfl...@us...>]

Revision: 4128
          http://sourceforge.net/p/dl-learner/code/4128
Author:   dfleischhacker
Date:     2013-10-24 13:47:14 +0000 (Thu, 24 Oct 2013)
Log Message:
-----------
Fix NPE in VSMCosineDocumentSimilarity by returning empty set if unable to produce a vector

Modified Paths:
--------------
    trunk/components-core/src/main/java/org/dllearner/algorithms/isle/VSMCosineDocumentSimilarity.java

Modified: trunk/components-core/src/main/java/org/dllearner/algorithms/isle/VSMCosineDocumentSimilarity.java
===================================================================
--- trunk/components-core/src/main/java/org/dllearner/algorithms/isle/VSMCosineDocumentSimilarity.java	2013-10-24 13:40:06 UTC (rev 4127)
+++ trunk/components-core/src/main/java/org/dllearner/algorithms/isle/VSMCosineDocumentSimilarity.java	2013-10-24 13:47:14 UTC (rev 4128)
@@ -182,6 +182,10 @@
     private Map<String, Double> getTermWeights(IndexReader reader, int docId)
             throws IOException {
         Terms vector = reader.getTermVector(docId, CONTENT);
+        //TODO: not sure if this is reasonable but it prevents NPEs
+        if (vector == null) {
+            return new HashMap<String, Double>();
+        }
         TermsEnum termsEnum = vector.iterator(null);
         Map<String, Double> weights = new HashMap<String, Double>();
         BytesRef text = null;

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