Package org.apache.accumulo.core.iterators

Examples of org.apache.accumulo.core.iterators.Combiner$ValueIterator

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    // keys that do not aggregate
    CombinerTest.nkv(tm1, 1, 1, 1, 1, false, new BigDecimal(2), encoder);
    CombinerTest.nkv(tm1, 1, 1, 1, 2, false, new BigDecimal(2.3), encoder);
    CombinerTest.nkv(tm1, 1, 1, 1, 3, false, new BigDecimal(-1.4E1), encoder);
   
    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);
   
    ai.next();
   
    assertFalse(ai.hasTop());
  }
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    // keys that do not aggregate
    nkv(tm1, 2, 2, 1, 1, false, 2l, encoder);
    nkv(tm1, 2, 2, 1, 2, false, 3l, encoder);
   
    Combiner ai = new SummingCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, FixedLenEncoder.class.getName());
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    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());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 1), ai.getTopKey());
    assertEquals("2", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    // seek after key that aggregates
    ai2.seek(nr(1, 1, 1, 2), EMPTY_COL_FAMS, false);
   
    assertTrue(ai2.hasTop());
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    // keys that do not aggregate
    nkv(tm1, 2, 2, 1, 1, false, 2l, encoder);
    nkv(tm1, 2, 2, 1, 2, false, 3l, encoder);
   
    Combiner ai = new SummingCombiner();
   
    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());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 1), ai.getTopKey());
    assertEquals("2", encoder.decode(ai.getTopValue().get()).toString());
   
    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());
   
    ai.next();
   
    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());
   
    // combine all columns
   
    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());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("5", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
  }
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    nkv(tm2, 1, 1, 1, 1, false, 3l, encoder);
   
    TreeMap<Key,Value> tm3 = new TreeMap<Key,Value>();
    nkv(tm3, 1, 1, 1, 1, false, 4l, encoder);
   
    Combiner ai = new SummingCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, StringEncoder.class);
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    List<SortedKeyValueIterator<Key,Value>> sources = new ArrayList<SortedKeyValueIterator<Key,Value>>(3);
    sources.add(new SortedMapIterator(tm1));
    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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    // keys that aggregate
    nkv(tm1, 1, 1, 1, 1, false, 2l, encoder);
    nkv(tm1, 1, 1, 1, 2, false, 3l, encoder);
    nkv(tm1, 1, 1, 1, 3, false, 4l, encoder);
   
    Combiner ai = new SummingCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, VarLenEncoder.class.getName());
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    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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    nkv(tm1, 1, 1, 1, 2, true, 0l, encoder);
    nkv(tm1, 1, 1, 1, 3, false, 4l, encoder);
    nkv(tm1, 1, 1, 1, 4, false, 3l, encoder);
   
    Combiner ai = new SummingCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, SummingCombiner.Type.FIXEDLEN);
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    ai.init(new SortedMapIterator(tm1), is.getOptions(), new DefaultIteratorEnvironment());
   
    ai.seek(nr(1, 1, 1, 4, true), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 4), ai.getTopKey());
    assertEquals("7", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 2, true), ai.getTopKey());
    assertEquals("0", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
    assertFalse(ai.hasTop());
   
    tm1 = new TreeMap<Key,Value>();
    nkv(tm1, 1, 1, 1, 2, true, 0l, encoder);
    ai = new SummingCombiner();
    ai.init(new SortedMapIterator(tm1), is.getOptions(), new DefaultIteratorEnvironment());
   
    ai.seek(nr(1, 1, 1, 4, true), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 2, true), ai.getTopKey());
    assertEquals("0", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
    assertFalse(ai.hasTop());
  }
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    tm.put(new Key("r", "count", "b", 3), new Value("1".getBytes()));
    tm.put(new Key("r", "count", "b", 4), new Value("1".getBytes()));
    tm.put(new Key("r", "count", "b", 5), new Value("1".getBytes()));
    tm.put(new Key("r", "count", "c", 6), new Value("1".getBytes()));
    SortedMapIterator smi = new SortedMapIterator(tm);
    Combiner iter = new SummingCombiner();
    IteratorSetting s = new IteratorSetting(10, "s", SummingCombiner.class);
    SummingCombiner.setColumns(s, Collections.singletonList(new IteratorSetting.Column("count")));
    SummingCombiner.setEncodingType(s, LongCombiner.StringEncoder.class);
    iter.init(smi, s.getOptions(), new DefaultIteratorEnvironment());
    Combiner iter2 = new SummingCombiner();
    IteratorSetting s2 = new IteratorSetting(10, "s2", SummingCombiner.class);
    SummingCombiner.setColumns(s2, Collections.singletonList(new IteratorSetting.Column("count","a")));
    SummingCombiner.setEncodingType(s2, LongCombiner.StringEncoder.class);
    iter2.init(iter, s.getOptions(), new DefaultIteratorEnvironment());
    iter2.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(iter2.hasTop());
    assertEquals("2", iter2.getTopValue().toString());
    iter2.next();
    assertTrue(iter2.hasTop());
    assertEquals("3", iter2.getTopValue().toString());
    iter2.next();
    assertTrue(iter2.hasTop());
    assertEquals("1", iter2.getTopValue().toString());
    iter2.next();
    assertFalse(iter2.hasTop());
  }
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    // keys that aggregate
    nkv(tm1, 1, 1, 1, 1, false, 4l, encoder);
    nkv(tm1, 1, 1, 1, 2, false, 3l, encoder);
    nkv(tm1, 1, 1, 1, 3, false, 2l, encoder);
   
    Combiner ai = new MaxCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, SummingCombiner.Type.VARLEN);
    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(1, 1, 1, 3), ai.getTopKey());
    assertEquals("4", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    ai = new MinCombiner();
   
    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("2", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
  }
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    // keys that aggregate
    nkv(tm1, 1, 1, 1, 1, false, nal(1l, 2l), encoder);
    nkv(tm1, 1, 1, 1, 2, false, nal(3l, 4l, 5l), encoder);
    nkv(tm1, 1, 1, 1, 3, false, nal(), encoder);
   
    Combiner ai = new SummingArrayCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingArrayCombiner.class);
    SummingArrayCombiner.setEncodingType(is, type);
    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(1, 1, 1, 3), ai.getTopKey());
    assertBytesEqual(encoder.encode(nal(4l, 6l, 5l)), ai.getTopValue().get());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    is.clearOptions();
    SummingArrayCombiner.setEncodingType(is, encoderClass);
    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(1, 1, 1, 3), ai.getTopKey());
    assertBytesEqual(encoder.encode(nal(4l, 6l, 5l)), ai.getTopValue().get());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    is.clearOptions();
    SummingArrayCombiner.setEncodingType(is, encoderClass.getName());
    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(1, 1, 1, 3), ai.getTopKey());
    assertBytesEqual(encoder.encode(nal(4l, 6l, 5l)), ai.getTopValue().get());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    is.clearOptions();
    SummingArrayCombiner.setEncodingType(is, SummingCombiner.VAR_LEN_ENCODER.getClass().getName());
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    try {
      ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
      Assert.fail();
    } catch (IllegalArgumentException e) {}
   
    is.clearOptions();
    SummingArrayCombiner.setEncodingType(is, BadEncoder.class.getName());
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));
   
    try {
      ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
      Assert.fail();
    } catch (IllegalArgumentException e) {}
  }
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    // keys that do not aggregate
    nkv(tm1, 1, 1, 1, 1, false, 2l, encoder);
    nkv(tm1, 1, 1, 1, 2, false, 3l, encoder);
    nkv(tm1, 1, 1, 1, 3, false, 4l, encoder);
   
    Combiner ai = new SummingCombiner();
   
    IteratorSetting is = new IteratorSetting(1, SummingCombiner.class);
    LongCombiner.setEncodingType(is, SummingCombiner.Type.VARLEN);
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("2")));
   
    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("4", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 1), ai.getTopKey());
    assertEquals("2", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    // try seeking
   
    ai.seek(nr(1, 1, 1, 2), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 2), ai.getTopKey());
    assertEquals("3", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 1), ai.getTopKey());
    assertEquals("2", encoder.decode(ai.getTopValue().get()).toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    // seek after everything
    ai.seek(nr(1, 1, 1, 0), EMPTY_COL_FAMS, false);
   
    assertFalse(ai.hasTop());
   
  }
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  • com.carrotsearch.hppc.cursors.DoubleCursor
  • com.carrotsearch.hppc.cursors.FloatCursor
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  • org.apache.accumulo.core.data.Range
  • org.apache.accumulo.core.data.Value
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