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

Package org.apache.accumulo.core.iterators

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

org.apache.accumulo.core.iterators.Filter
A SortedKeyValueIterator that filters entries from its source iterator. Subclasses must implement an accept method: public boolean accept(Key k, Value v); Key/Value pairs for which the accept method returns true are said to match the filter. By default, this class iterates over entries that match its filter. This iterator takes an optional "negate" boolean parameter that defaults to false. If negate is set to true, this class instead omits entries that match its filter, thus iterating over entries that do not match its filter.

      Key k = new Key(new Text(String.format("%03d", i)), colf, colq);
      tm.put(k, dv);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter = new SimpleFilter();
    
    IteratorSetting is = new IteratorSetting(1, SimpleFilter.class);
    Filter.setNegate(is, true);
    
    filter.init(new SortedMapIterator(tm), is.getOptions(), null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter);
    assertTrue("size = " + size, size == 900);
    
    filter.init(new SortedMapIterator(tm), is.getOptions(), null);
    Key k = new Key(new Text("500"));
    filter.seek(new Range(k, null), EMPTY_COL_FAMS, false);
    size = size(filter);
    assertTrue("size = " + size, size == 450);
    
    filter.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Filter filter2 = new SimpleFilter2();
    filter2.init(filter, is.getOptions(), null);
    filter2.seek(new Range(), EMPTY_COL_FAMS, false);
    size = size(filter2);
    assertTrue("size = " + size, size == 100);
  }

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      Key k = new Key(String.format("%03d", i), "a", "b", i % 10 == 0 ? "vis" : "");
      tm.put(k, v);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter = new ReqVisFilter();
    filter.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter);
    assertTrue("size = " + size, size == 100);
  }

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    k = new Key(new Text("10"), colf, colq);
    tm.put(k, dv);
    
    assertTrue(tm.size() == 4);
    
    Filter filter = new SimpleFilter();
    filter.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter);
    assertTrue("size = " + size, size == 3);
    
  }

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      Key k = new Key(new Text(String.format("%03d", i)), colf, colq);
      tm.put(k, dv);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter1 = new SimpleFilter();
    filter1.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter1.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter1);
    assertTrue("size = " + size, size == 100);
    
    Filter fi = new SimpleFilter();
    fi.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Key k = new Key(new Text("500"));
    fi.seek(new Range(k, null), EMPTY_COL_FAMS, false);
    size = size(fi);
    assertTrue("size = " + size, size == 50);
    
    filter1 = new SimpleFilter();
    filter1.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Filter filter2 = new SimpleFilter2();
    filter2.init(filter1, EMPTY_OPTS, null);
    filter2.seek(new Range(), EMPTY_COL_FAMS, false);
    size = size(filter2);
    assertTrue("size = " + size, size == 0);
  }

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  private void verify(TreeMap<Key,Value> source, int expectedSourceSize, Map<String,String> options, Text expectedCF, Text expectedCQ, Text expectedCV,
      int expectedFinalCount) throws IOException {
    assertEquals(expectedSourceSize, source.size());
    
    Filter filter = new VisibilityFilter();
    filter.init(new SortedMapIterator(source), options, null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    
    int count = 0;
    while (filter.hasTop()) {
      count++;
      // System.out.println(DefaultFormatter.formatEntry(Collections.singletonMap(filter.getTopKey(), filter.getTopValue()).entrySet().iterator().next(),
      // false));
      assertEquals(expectedCF, filter.getTopKey().getColumnFamily());
      assertEquals(expectedCQ, filter.getTopKey().getColumnQualifier());
      assertEquals(expectedCV, filter.getTopKey().getColumnVisibility());
      filter.next();
    }
    assertEquals(expectedFinalCount, count);
  }

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      Key k = new Key(new Text(String.format("%03d", i)), colf, colq);
      tm.put(k, dv);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter1 = new SimpleFilter();
    filter1.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter1.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter1);
    assertTrue("size = " + size, size == 100);
    
    Filter fi = new SimpleFilter();
    fi.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Key k = new Key(new Text("500"));
    fi.seek(new Range(k, null), EMPTY_COL_FAMS, false);
    size = size(fi);
    assertTrue("size = " + size, size == 50);
    
    filter1 = new SimpleFilter();
    filter1.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Filter filter2 = new SimpleFilter2();
    filter2.init(filter1, EMPTY_OPTS, null);
    filter2.seek(new Range(), EMPTY_COL_FAMS, false);
    size = size(filter2);
    assertTrue("size = " + size, size == 0);
  }

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      Key k = new Key(new Text(String.format("%03d", i)), colf, colq);
      tm.put(k, dv);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter = new SimpleFilter();
    
    IteratorSetting is = new IteratorSetting(1, SimpleFilter.class);
    Filter.setNegate(is, true);
    
    filter.init(new SortedMapIterator(tm), is.getOptions(), null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter);
    assertTrue("size = " + size, size == 900);
    
    filter.init(new SortedMapIterator(tm), is.getOptions(), null);
    Key k = new Key(new Text("500"));
    filter.seek(new Range(k, null), EMPTY_COL_FAMS, false);
    size = size(filter);
    assertTrue("size = " + size, size == 450);
    
    filter.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Filter filter2 = new SimpleFilter2();
    filter2.init(filter, is.getOptions(), null);
    filter2.seek(new Range(), EMPTY_COL_FAMS, false);
    size = size(filter2);
    assertTrue("size = " + size, size == 100);
  }

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      Key k = new Key(String.format("%03d", i), "a", "b", i % 10 == 0 ? "vis" : "");
      tm.put(k, v);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter = new ReqVisFilter();
    filter.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter);
    assertTrue("size = " + size, size == 100);
  }

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    k = new Key(new Text("10"), colf, colq);
    tm.put(k, dv);
    
    assertTrue(tm.size() == 4);
    
    Filter filter = new SimpleFilter();
    filter.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter);
    assertTrue("size = " + size, size == 3);
    
  }

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      Key k = new Key(new Text(String.format("%03d", i)), colf, colq);
      tm.put(k, dv);
    }
    assertTrue(tm.size() == 1000);
    
    Filter filter1 = new SimpleFilter();
    filter1.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    filter1.seek(new Range(), EMPTY_COL_FAMS, false);
    int size = size(filter1);
    assertTrue("size = " + size, size == 100);
    
    Filter fi = new SimpleFilter();
    fi.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Key k = new Key(new Text("500"));
    fi.seek(new Range(k, null), EMPTY_COL_FAMS, false);
    size = size(fi);
    assertTrue("size = " + size, size == 50);
    
    filter1 = new SimpleFilter();
    filter1.init(new SortedMapIterator(tm), EMPTY_OPTS, null);
    Filter filter2 = new SimpleFilter2();
    filter2.init(filter1, EMPTY_OPTS, null);
    filter2.seek(new Range(), EMPTY_COL_FAMS, false);
    size = size(filter2);
    assertTrue("size = " + size, size == 0);
  }

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Related Classes of org.apache.accumulo.core.iterators.Filter

org.apache.accumulo.core.iterators.user.FilterTest

org.apache.accumulo.core.iterators.user.VisibilityFilterTest

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