Package org.apache.accumulo.core.iterators

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

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    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);
   
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    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());
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  @Test
  public void valueIteratorTest() throws IOException {
    TreeMap<Key,Value> tm = new TreeMap<Key,Value>();
    tm.put(new Key("r", "f", "q", 1), new Value("1".getBytes()));
    tm.put(new Key("r", "f", "q", 2), new Value("2".getBytes()));
    SortedMapIterator smi = new SortedMapIterator(tm);
    smi.seek(new Range(), EMPTY_COL_FAMS, false);
    ValueIterator iter = new ValueIterator(smi);
    assertEquals(iter.next().toString(), "2");
    assertEquals(iter.next().toString(), "1");
    assertFalse(iter.hasNext());
  }
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    tm.put(new Key("r", "count", "a", 2), new Value("1".getBytes()));
    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());
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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());
   
    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());
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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());
   
    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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    public synchronized InterruptibleIterator skvIterator() {
      if (map == null)
        throw new IllegalStateException();
     
      return new SortedMapIterator(map);
    }
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  private static SortedKeyValueIterator<Key,Value> createScanIterator(KeyExtent ke, Collection<SortedKeyValueIterator<Key,Value>> mapfiles,
      Authorizations authorizations, byte[] defaultLabels, HashSet<Column> columnSet, List<IterInfo> ssiList, Map<String,Map<String,String>> ssio,
      boolean useTableIterators, TableConfiguration conf) throws IOException {
   
    SortedMapIterator smi = new SortedMapIterator(new TreeMap<Key,Value>());
   
    List<SortedKeyValueIterator<Key,Value>> iters = new ArrayList<SortedKeyValueIterator<Key,Value>>(mapfiles.size() + 1);
   
    iters.addAll(mapfiles);
    iters.add(smi);
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    }
  }
 
  @Override
  public Iterator<Entry<Key,Value>> iterator() {
    SortedKeyValueIterator<Key,Value> i = new SortedMapIterator(table.table);
    try {
      i = new RangeFilter(createFilter(i), range);
      i.seek(range, createColumnBSS(fetchedColumns), !fetchedColumns.isEmpty());
      return new IteratorAdapter(i);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
   
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      throw new IllegalStateException("ranges not set");
    }

    IteratorChain chain = new IteratorChain();
    for (Range range : ranges) {
      SortedKeyValueIterator<Key,Value> i = new SortedMapIterator(table.table);
      try {
        i = createFilter(i);
        i.seek(range, createColumnBSS(fetchedColumns), !fetchedColumns.isEmpty());
        chain.addIterator(new IteratorAdapter(i));
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }
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Related Classes of org.apache.accumulo.core.iterators.SortedMapIterator

  • org.apache.accumulo.core.client.mock.MockBatchScanner
  • org.apache.accumulo.core.client.mock.MockScanner
  • org.apache.accumulo.core.data.Key
  • org.apache.accumulo.core.data.Range
  • org.apache.accumulo.core.iterators.AggregatingIteratorTest
  • org.apache.accumulo.core.iterators.ColumnFamilySkippingIteratorTest
  • org.apache.accumulo.core.iterators.DeletingIteratorTest
  • org.apache.accumulo.core.iterators.FilteringIteratorTest
  • org.apache.accumulo.core.iterators.IntersectingIteratorTest
  • org.apache.accumulo.core.iterators.IterUtilTest
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