Package org.apache.accumulo.core.iterators

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

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    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());
   
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    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());
   
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    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());
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    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());
   
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    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());
   
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    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());
   
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    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());
   
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    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());
   
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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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