[jira] Created: (MAHOUT-354) make the output of RecommenderJob more readable

[Hui Wen Han (JIRA)]

make the output of RecommenderJob more readable
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                 Key: MAHOUT-354
                 URL: https://issues.apache.org/jira/browse/MAHOUT-354
             Project: Mahout
          Issue Type: Improvement
          Components: Collaborative Filtering
    Affects Versions: 0.4
            Reporter: Hui Wen Han


now the output of  RecommenderMapper as following:
output.collect(userID, new RecommendedItemsWritable(recommendations));

Can we change it more readable like following:

   private final Text user = new Text();
    private final Text recomScore = new Text();
    private static final String FIELD_SEPERATOR = ",";
    for (RecommendedItem recommendation : recommendations)
    {
        user.set(String.valueOf(userId));
        recomScore.set(recommendation.getItemID() + FIELD_SEPERATOR + 
recommendation.getValue());
        output.collect(user, recomScore);
    }

then user can read and verify the result more convenient and need not depend on 
the mahout  API


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