Example usage for org.apache.mahout.cf.taste.impl.similarity GenericUserSimilarity GenericUserSimilarity

Introduction

In this page you can find the example usage for org.apache.mahout.cf.taste.impl.similarity GenericUserSimilarity GenericUserSimilarity.

Prototype

public GenericUserSimilarity(Iterable<UserUserSimilarity> similarities) 

Source Link

Usage

From source file:com.anjuke.romar.mahout.similarity.ReadableGenericSimilarityProxyTest.java

License:Apache License

@Test
public void testProxySimilarityGenericUserSimilarity() {
    Iterator<UserUserSimilarity> it = Iterators.singletonIterator(new UserUserSimilarity(1, 2, 0.8));
    GenericUserSimilarity similarity = new GenericUserSimilarity(Util.iterable(it));
    ReadableGenericUserSimilarity readable = ReadableGenericSimilarityProxy.proxySimilarity(similarity);

    FastByIDMap<FastByIDMap<Double>> idIdValueMap = readable.getSimilarityMaps();
    FastByIDMap<Double> id2ValueMap = idIdValueMap.get(1);

    assertNotNull(id2ValueMap);/*ww w . ja  va2s  .  co m*/
    assertEquals(0.8, id2ValueMap.get(2).doubleValue(), 0.00001);
}

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From source file:com.anjuke.romar.mahout.similarity.RomarFileUserSimilarity.java

License:Apache License

protected void reload() {
    if (_reloadLock.tryLock()) {
        try {//from  w  w  w .j  av  a  2s  . c  o m
            long newLastModified = _dataFile.lastModified();
            LOG.info("reading similarity from " + _dataFile.getAbsolutePath());
            _delegate = new GenericUserSimilarity(Util.iterable(_iteratorBuilder.build(_dataFile)));
            LOG.info("read similarity finish");
            _lastModified = newLastModified;
        } finally {
            _reloadLock.unlock();
        }
    }
}

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