Example usage for org.apache.mahout.cf.taste.recommender Recommender getDataModel

Introduction

In this page you can find the example usage for org.apache.mahout.cf.taste.recommender Recommender getDataModel.

Prototype

DataModel getDataModel();

Source Link

Usage

From source file:net.ufida.info.mahout.common.CachingRecommender.java

License:Apache License

public CachingRecommender(Recommender recommender) throws TasteException {
    Preconditions.checkArgument(recommender != null, "recommender is null");
    this.recommender = recommender;
    maxHowMany = new int[] { 1 };
    // Use "num users" as an upper limit on cache size. Rough guess.
    int numUsers = recommender.getDataModel().getNumUsers();
    recommendationsRetriever = new RecommendationRetriever();
    recommendationCache = new Cache<Long, Recommendations>(recommendationsRetriever, numUsers);
    estimatedPrefCache = new Cache<LongPair, Float>(new EstimatedPrefRetriever(), numUsers);
    refreshHelper = new RefreshHelper(new Callable<Object>() {
        @Override/*from  w  w w .  j a  va2 s. c o m*/
        public Object call() {
            clear();
            return null;
        }
    });
    refreshHelper.addDependency(recommender);
}

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From source file:org.zaizi.mahout.eval.MahoutRecommenderEvaluator.java

License:Open Source License

/**
 * Evaluate recommender//from  w w  w.  j a  va 2  s .c  om
 *
 * @param recommender - The recommender to be evaluated
 * @param evaluator   - The evaluator
 * @return Score of the recommender
 * @throws TasteException
 */
public static RecommenderScore evaluate(Recommender recommender, MahoutEvaluator evaluator)
        throws TasteException {

    RecommenderBuilder builder = new DefaultRecommenderBuilder(recommender);

    double score = evaluator.evaluate(builder, recommender.getDataModel());

    return new RecommenderScoreImpl(recommender, score);
}

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