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Posted to commits@mahout.apache.org by sr...@apache.org on 2009/05/28 13:03:10 UTC
svn commit: r779560 -
/lucene/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/slopeone/MemoryDiffStorage.java
Author: srowen
Date: Thu May 28 11:03:10 2009
New Revision: 779560
URL: http://svn.apache.org/viewvc?rev=779560&view=rev
Log:
Better exception in case where dataModel has no items
Modified:
lucene/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/slopeone/MemoryDiffStorage.java
Modified: lucene/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/slopeone/MemoryDiffStorage.java
URL: http://svn.apache.org/viewvc/lucene/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/slopeone/MemoryDiffStorage.java?rev=779560&r1=779559&r2=779560&view=diff
==============================================================================
--- lucene/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/slopeone/MemoryDiffStorage.java (original)
+++ lucene/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/recommender/slopeone/MemoryDiffStorage.java Thu May 28 11:03:10 2009
@@ -97,6 +97,9 @@
if (dataModel == null) {
throw new IllegalArgumentException("dataModel is null");
}
+ if (dataModel.getNumItems() < 1) {
+ throw new IllegalArgumentException("dataModel has no items");
+ }
if (maxEntries <= 0L) {
throw new IllegalArgumentException("maxEntries must be positive");
}