Package org.apache.mahout.cf.taste.recommender

Examples of org.apache.mahout.cf.taste.recommender.IDRescorer.rescore()

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  @Override
  public float estimatePreference(long userID, long itemID)
      throws TasteException {
    IDRescorer rescorer = new GenderRescorer(
        men, women, usersRateMoreMen, usersRateLessMen, userID, model);
    return (float) rescorer.rescore(
        itemID, delegate.estimatePreference(userID, itemID));
  }

  @Override
  public void setPreference(long userID, long itemID, float value)
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public final class NullRescorerTest extends TasteTestCase {

  public void testItemRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getItemInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }
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  public void testItemRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getItemInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

  public void testUserRescorer() throws Exception {
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  public void testItemRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getItemInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

  public void testUserRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getUserInstance();
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    IDRescorer rescorer = NullRescorer.getItemInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

  public void testUserRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getUserInstance();
    assertNotNull(rescorer);
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  }

  public void testUserRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getUserInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }
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  public void testUserRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getUserInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

}
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  public void testUserRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getUserInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

}
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    IDRescorer rescorer = NullRescorer.getUserInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0));
    assertEquals(1.0, rescorer.rescore(0L, 1.0));
    assertEquals(0.0, rescorer.rescore(1L, 0.0));
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

}
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  @Test
  public void testItemRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getItemInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0), EPSILON);
    assertEquals(1.0, rescorer.rescore(0L, 1.0), EPSILON);
    assertEquals(0.0, rescorer.rescore(1L, 0.0), EPSILON);
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }
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