Examples of MutableRecommendedItem

net.myrrix.common.MutableRecommendedItem
An implementation of {@link RecommendedItem} which is mutable. This lets implementationsreuse one object during its iterations rather than create new objects for each element. @author Sean Owen @since 1.0
org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem
Mutable variant of {@link RecommendedItem}

Examples of net.myrrix.common.MutableRecommendedItem

                    Iterator<FastByIDMap.MapEntry<float[]>> Yiterator,
                    FastIDSet knownItemIDs,
                    FastIDSet userTagIDs,
                    IDRescorer rescorer) {
    Preconditions.checkArgument(features.length > 0, "features must not be empty");
    delegate = new MutableRecommendedItem();
    this.features = features;
    this.Yiterator = Yiterator;
    this.knownItemIDs = knownItemIDs;
    this.userTagIDs = userTagIDs;
    this.rescorer = rescorer;

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Examples of net.myrrix.common.MutableRecommendedItem

  private final MutableRecommendedItem delegate;
  private final Iterator<FastByIDFloatMap.MapEntry> countsIterator;
  private final IDRescorer rescorer;


  MostPopularItemsIterator(Iterator<FastByIDFloatMap.MapEntry> countsIterator, IDRescorer rescorer) {
    delegate = new MutableRecommendedItem();
    this.countsIterator = countsIterator;
    this.rescorer = rescorer;
  }

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Examples of net.myrrix.common.MutableRecommendedItem

  MostSimilarItemIterator(Iterator<FastByIDMap.MapEntry<float[]>> Yiterator,
                          FastIDSet userTagIDs,
                          long[] toItemIDs,
                          float[][] itemFeatures,
                          Rescorer<LongPair> rescorer) {
    delegate = new MutableRecommendedItem();
    this.toItemIDs = toItemIDs;
    this.itemFeatures = itemFeatures;
    this.Yiterator = Yiterator;
    this.userTagIDs = userTagIDs;
    this.rescorer = rescorer;

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Examples of net.myrrix.common.MutableRecommendedItem

  private final FastIDSet userTagIDs;


  RecommendedBecauseIterator(Iterator<FastByIDMap.MapEntry<float[]>> toFeaturesIterator, 
                             FastIDSet userTagIDs,
                             float[] features) {
    delegate = new MutableRecommendedItem();
    this.features = features;
    this.featuresNorm = SimpleVectorMath.norm(features);
    this.toFeaturesIterator = toFeaturesIterator;
    this.userTagIDs = userTagIDs;
  }

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Examples of org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem

      }
      if (itemsToRecommendFor == null || itemsToRecommendFor.contains(itemID)) {
        float value = (float) element.get();
        if (!Float.isNaN(value)) {


          MutableRecommendedItem topItem = topKItems.top();
          if (value > topItem.getValue()) {
            topItem.set(itemID, value);
            topKItems.updateTop();
          }
        }
      }
    }

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Examples of org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem

      @Override
      public boolean apply(int itemID, Vector itemFeatures) {
        if (!alreadyRatedItems.contains(itemID)) {
          double predictedRating = userFeatures.dot(itemFeatures);


          MutableRecommendedItem top = topItemsQueue.top();
          if (predictedRating > top.getValue()) {
            top.set(itemID, (float) predictedRating);
            topItemsQueue.updateTop();
          }
        }
        return true;
      }

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Examples of org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem

  @Test
  public void testAggregateAndRecommendReducer() throws Exception {
    Reducer<VarLongWritable,PrefAndSimilarityColumnWritable,VarLongWritable,RecommendedItemsWritable>.Context context =
        EasyMock.createMock(Reducer.Context.class);


    context.write(EasyMock.eq(new VarLongWritable(123L)), recommendationsMatch(new MutableRecommendedItem(1L, 2.8f),
        new MutableRecommendedItem(2L, 2.0f)));


    EasyMock.replay(context);


    RandomAccessSparseVector similarityColumnOne = new RandomAccessSparseVector(Integer.MAX_VALUE, 100);
    similarityColumnOne.set(1, 0.1);

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Examples of org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem

  @Test
  public void testAggregateAndRecommendReducerExcludeRecommendationsBasedOnOneItem() throws Exception {
    Reducer<VarLongWritable,PrefAndSimilarityColumnWritable,VarLongWritable,RecommendedItemsWritable>.Context context =
        EasyMock.createMock(Reducer.Context.class);


    context.write(EasyMock.eq(new VarLongWritable(123L)), recommendationsMatch(new MutableRecommendedItem(1L, 2.8f)));


    EasyMock.replay(context);


    RandomAccessSparseVector similarityColumnOne = new RandomAccessSparseVector(Integer.MAX_VALUE, 100);
    similarityColumnOne.set(1, 0.1);

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Examples of org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem

  @Test
  public void testAggregateAndRecommendReducerLimitNumberOfRecommendations() throws Exception {
    Reducer<VarLongWritable,PrefAndSimilarityColumnWritable,VarLongWritable,RecommendedItemsWritable>.Context context =
      EasyMock.createMock(Reducer.Context.class);


    context.write(EasyMock.eq(new VarLongWritable(123L)), recommendationsMatch(new MutableRecommendedItem(1L, 2.8f)));


    EasyMock.replay(context);


    RandomAccessSparseVector similarityColumnOne = new RandomAccessSparseVector(Integer.MAX_VALUE, 100);
    similarityColumnOne.set(1, 0.1);

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Examples of org.apache.mahout.cf.taste.hadoop.MutableRecommendedItem

  @Test
  public void testAggregateAndRecommendReducer() throws Exception {
    Reducer<VarLongWritable,PrefAndSimilarityColumnWritable,VarLongWritable,RecommendedItemsWritable>.Context context =
        EasyMock.createMock(Reducer.Context.class);


    context.write(EasyMock.eq(new VarLongWritable(123L)), recommendationsMatch(new MutableRecommendedItem(1L, 2.8f),
        new MutableRecommendedItem(2L, 2.0f)));


    EasyMock.replay(context);


    RandomAccessSparseVector similarityColumnOne = new RandomAccessSparseVector(Integer.MAX_VALUE, 100);
    similarityColumnOne.set(1, 0.1);

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