Package org.apache.accumulo.core.iterators

Examples of org.apache.accumulo.core.iterators.AggregatingIterator

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    // keys that do not aggregate
    nkv(tm1, 1, 1, 1, 1, false, "2");
    nkv(tm1, 1, 1, 1, 2, false, "3");
    nkv(tm1, 1, 1, 1, 3, false, "4");
   
    AggregatingIterator ai = new AggregatingIterator();
   
    Map<String,String> emptyMap = Collections.emptyMap();
    ai.init(new SortedMapIterator(tm1), emptyMap, null);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("4", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 2), ai.getTopKey());
    assertEquals("3", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 1), ai.getTopKey());
    assertEquals("2", ai.getTopValue().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", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 1), ai.getTopKey());
    assertEquals("2", ai.getTopValue().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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    // keys that aggregate
    nkv(tm1, 1, 1, 1, 1, false, "2");
    nkv(tm1, 1, 1, 1, 2, false, "3");
    nkv(tm1, 1, 1, 1, 3, false, "4");
   
    AggregatingIterator ai = new AggregatingIterator();
   
    Map<String,String> opts = new HashMap<String,String>();
   
    opts.put("cf001", SummationAggregator.class.getName());
   
    ai.init(new SortedMapIterator(tm1), opts, null);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", ai.getTopValue().toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    // try seeking to the beginning of a key that aggregates
   
    ai.seek(nr(1, 1, 1, 3), EMPTY_COL_FAMS, false);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", ai.getTopValue().toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
   
    // try seeking the middle of a key the aggregates
    ai.seek(nr(1, 1, 1, 2), EMPTY_COL_FAMS, false);
   
    assertFalse(ai.hasTop());
   
    // try seeking to the end of a key the aggregates
    ai.seek(nr(1, 1, 1, 1), EMPTY_COL_FAMS, false);
   
    assertFalse(ai.hasTop());
   
    // try seeking before a key the 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", ai.getTopValue().toString());
   
    ai.next();
   
    assertFalse(ai.hasTop());
  }
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    // keys that do not aggregate
    nkv(tm1, 2, 2, 1, 1, false, "2");
    nkv(tm1, 2, 2, 1, 2, false, "3");
   
    AggregatingIterator ai = new AggregatingIterator();
   
    Map<String,String> opts = new HashMap<String,String>();
   
    opts.put("cf001", SummationAggregator.class.getName());
   
    ai.init(new SortedMapIterator(tm1), opts, null);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 1), ai.getTopKey());
    assertEquals("2", ai.getTopValue().toString());
   
    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", ai.getTopValue().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", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", ai.getTopValue().toString());
   
  }
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    // keys that do not aggregate
    nkv(tm1, 2, 2, 1, 1, false, "2");
    nkv(tm1, 2, 2, 1, 2, false, "3");
   
    AggregatingIterator ai = new AggregatingIterator();
   
    Map<String,String> opts = new HashMap<String,String>();
   
    opts.put("cf001", SummationAggregator.class.getName());
   
    ai.init(new SortedMapIterator(tm1), opts, null);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(0, 0, 1, 1), ai.getTopKey());
    assertEquals("7", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals("9", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 1), ai.getTopKey());
    assertEquals("2", ai.getTopValue().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", ai.getTopValue().toString());
   
    ai.next();
   
    assertTrue(ai.hasTop());
    assertEquals(nk(2, 2, 1, 2), ai.getTopKey());
    assertEquals("3", ai.getTopValue().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", ai.getTopValue().toString());
   
  }
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    nkv(tm2, 1, 1, 1, 1, false, "3");
   
    TreeMap<Key,Value> tm3 = new TreeMap<Key,Value>();
    nkv(tm3, 1, 1, 1, 1, false, "4");
   
    AggregatingIterator ai = new AggregatingIterator();
    Map<String,String> opts = new HashMap<String,String>();
    opts.put("cf001", SummationAggregator.class.getName());
   
    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, opts, null);
   
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 1), ai.getTopKey());
    assertEquals("9", ai.getTopValue().toString());
  }
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    // keys that aggregate
    nkv(tm1, 1, 1, 1, 1, false, "2");
    nkv(tm1, 1, 1, 1, 2, false, "3");
    nkv(tm1, 1, 1, 1, 3, false, "4");
   
    AggregatingIterator ai = new AggregatingIterator();
   
    Map<String,String> opts = new HashMap<String,String>();
   
    opts.put("cf001", SummationAggregator.class.getName());
   
    ai.init(new SortedMapIterator(tm1), opts, 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, "");
    nkv(tm1, 1, 1, 1, 3, false, "4");
    nkv(tm1, 1, 1, 1, 4, false, "3");
   
    AggregatingIterator ai = new AggregatingIterator();
   
    Map<String,String> opts = new HashMap<String,String>();
   
    opts.put("cf001", SummationAggregator.class.getName());
   
    ai.init(new SortedMapIterator(tm1), opts, 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", ai.getTopValue().toString());
   
    ai.next();
    assertTrue(ai.hasTop());
    assertEquals(nk(1, 1, 1, 2, true), ai.getTopKey());
    assertEquals("", ai.getTopValue().toString());
   
    ai.next();
    assertFalse(ai.hasTop());
   
    tm1 = new TreeMap<Key,Value>();
    nkv(tm1, 1, 1, 1, 2, true, "");
    ai = new AggregatingIterator();
    ai.init(new SortedMapIterator(tm1), opts, 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("", ai.getTopValue().toString());
   
    ai.next();
    assertFalse(ai.hasTop());
   
  }
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Related Classes of org.apache.accumulo.core.iterators.AggregatingIterator

  • org.apache.accumulo.core.data.Key
  • org.apache.accumulo.core.data.Range
  • org.apache.accumulo.core.iterators.AggregatingIteratorTest
  • org.apache.accumulo.core.iterators.aggregation.Aggregator
  • java.io.IOException
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