Package org.apache.accumulo.core.iterators

Examples of org.apache.accumulo.core.iterators.Combiner.seek()

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    Combiner ai = new BigDecimalCombiner.BigDecimalSummingCombiner();
    IteratorSetting is = new IteratorSetting(1, BigDecimalCombiner.BigDecimalSummingCombiner.class);
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));

    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(CombinerTest.nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals(-9.7, encoder.decode(ai.getTopValue().get()).doubleValue(),delta);
   
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    ai.next();
   
    assertFalse(ai.hasTop());
   
    // seek after key that aggregates
    ai.seek(nr(1, 1, 1, 2), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
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    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
    // seek before key that aggregates
    ai.seek(nr(1, 1, 1, 4), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", encoder.decode(ai.getTopValue().get()).toString());
   
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    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
   
    SortedKeyValueIterator<Key,Value> ai2 = ai.deepCopy(null);
    SortedKeyValueIterator<Key,Value> ai3 = ai.deepCopy(null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", encoder.decode(ai.getTopValue().get()).toString());
   
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    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, SummingCombiner.Type.STRING);
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(0, 0, 1, 1), ai.getTopKey());
    assertEquals("7", encoder.decode(ai.getTopValue().get()).toString());
   
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    ai.next();
   
    assertFalse(ai.hasTop());
   
    // seek test
    ai.seek(nr(0, 0, 1, 0), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", encoder.decode(ai.getTopValue().get()).toString());
   
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    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
    // seek after key that aggregates
    ai.seek(nr(1, 1, 1, 2), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
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    is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, SummingCombiner.Type.STRING);
    Combiner.setCombineAllColumns(is, true);
   
    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(0, 0, 1, 1), ai.getTopKey());
    assertEquals("7", encoder.decode(ai.getTopValue().get()).toString());
   
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    sources.add(new SortedMapIterator(tm2));
    sources.add(new SortedMapIterator(tm3));
   
    MultiIterator mi = new MultiIterator(sources, true);
    ai.init(mi, is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 1), ai.getTopKey());
    assertEquals("9", encoder.decode(ai.getTopValue().get()).toString());
  }
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    ai.init(new SortedMapIterator(tm1), is.getOptions(), new DefaultIteratorEnvironment());
   
    // try seeking to the beginning of a key that aggregates
   
    ai.seek(nr(1, 1, 1, 3, false), EMPTY_COL_FAMS, false);
   
    assertFalse(ai.hasTop());
   
  }
 
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