Example usage for org.apache.mahout.cf.taste.model DataModel hasPreferenceValues

Introduction

In this page you can find the example usage for org.apache.mahout.cf.taste.model DataModel hasPreferenceValues.

Prototype

boolean hasPreferenceValues();

Source Link

Usage

From source file:org.easyrec.mahout.EasyrecInMemoryDataModelTest.java

License:Open Source License

@Test
public void testEasyrecDataModel_hasPreferenceValues() throws TasteException {
    DataModel easyrecDataModel = new EasyrecDataModel(TENANT_ID, RATE_ACTION_TYPE_ID, HAS_RATING_VALUES,
            mahoutDataModelMappingDAO);//from  www. j  a  v  a 2 s .co  m
    easyrecDataModel = new EasyrecInMemoryDataModel(easyrecDataModel);

    boolean hasPreferenceValues = easyrecDataModel.hasPreferenceValues();

    assertEquals(true, hasPreferenceValues);
}

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From source file:recsys.similarity.TrueEuclideanDistanceSimilarity.java

License:Apache License

/**
 * @throws IllegalArgumentException/* www . jav  a 2s.c om*/
 *             if {@link DataModel} does not have preference values
 */
public TrueEuclideanDistanceSimilarity(DataModel dataModel, Weighting weighting) throws TasteException {
    super(dataModel, weighting, false);
    Preconditions.checkArgument(dataModel.hasPreferenceValues(), "DataModel doesn't have preference values");
}

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