Package org.apache.mahout.cf.taste.model

Examples of org.apache.mahout.cf.taste.model.IDMigrator.toStringID()

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    /* we shouldn't see any changes in the data as we have not yet refreshed */
    long cowAsLong = migrator.toLongID("cow");
    long donkeyAsLong = migrator.toLongID("donkey");
    assertEquals("dog", migrator.toStringID(dogAsLong));
    assertEquals("cow", migrator.toStringID(cowAsLong));
    assertNull(migrator.toStringID(donkeyAsLong));
  }

  @Test
  public void testRefreshAfterFileUpdate() throws Exception {
    IDMigrator migrator = new FileIDMigrator(testFile, 0L);
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  public void testRefreshAfterFileUpdate() throws Exception {
    IDMigrator migrator = new FileIDMigrator(testFile, 0L);

    /* call a method to make sure the original file is loaded */
    long dogAsLong = migrator.toLongID("dog");
    migrator.toStringID(dogAsLong);

    /* change the underlying file,
     * we have to wait at least a second to see the change in the file's lastModified timestamp */
    Thread.sleep(2000L);
    writeLines(testFile, UPDATED_STRING_IDS);
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    migrator.refresh(null);

    long cowAsLong = migrator.toLongID("cow");
    long donkeyAsLong = migrator.toLongID("donkey");
    assertEquals("dog", migrator.toStringID(dogAsLong));
    assertEquals("cow", migrator.toStringID(cowAsLong));
    assertEquals("donkey", migrator.toStringID(donkeyAsLong));
  }
}
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    migrator.refresh(null);

    long cowAsLong = migrator.toLongID("cow");
    long donkeyAsLong = migrator.toLongID("donkey");
    assertEquals("dog", migrator.toStringID(dogAsLong));
    assertEquals("cow", migrator.toStringID(cowAsLong));
    assertEquals("donkey", migrator.toStringID(donkeyAsLong));
  }
}
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    long cowAsLong = migrator.toLongID("cow");
    long donkeyAsLong = migrator.toLongID("donkey");
    assertEquals("dog", migrator.toStringID(dogAsLong));
    assertEquals("cow", migrator.toStringID(cowAsLong));
    assertEquals("donkey", migrator.toStringID(donkeyAsLong));
  }
}
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  }

  @Test(expected = UnsupportedOperationException.class)
  public void testBackward() throws Exception {
    IDMigrator migrator = new OneWayMigrator();
    migrator.toStringID(0L);
  }

}
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