Examples of org.apache.hadoop.hbase.filter.SingleColumnValueFilter

org.apache.hadoop.hbase.filter.SingleColumnValueFilter
This filter is used to filter cells based on value. It takes a {@link CompareFilter.CompareOp}operator (equal, greater, not equal, etc), and either a byte [] value or a ByteArrayComparable.
If we have a byte [] value then we just do a lexicographic compare. For example, if passed value is 'b' and cell has 'a' and the compare operator is LESS, then we will filter out this cell (return true). If this is not sufficient (eg you want to deserialize a long and then compare it to a fixed long value), then you can pass in your own comparator instead.
You must also specify a family and qualifier. Only the value of this column will be tested. When using this filter on a {@link Scan} with specifiedinputs, the column to be tested should also be added as input (otherwise the filter will regard the column as missing).
To prevent the entire row from being emitted if the column is not found on a row, use {@link #setFilterIfMissing}. Otherwise, if the column is found, the entire row will be emitted only if the value passes. If the value fails, the row will be filtered out.
In order to test values of previous versions (timestamps), set {@link #setLatestVersionOnly} to false. The default is true, meaning thatonly the latest version's value is tested and all previous versions are ignored.
To filter based on the value of all scanned columns, use {@link ValueFilter}.

      throws IOException {
    // Defaults FilterList.Operator.MUST_PASS_ALL.
    FilterList allFilters = new FilterList();
    allFilters.addFilter(new PrefixFilter(Bytes.toBytes(keyPrefix)));
    // Only return rows where this column value exists in the row.
    SingleColumnValueFilter filter = new SingleColumnValueFilter(Bytes.toBytes("trans-tags"),
        Bytes.toBytes("qual2"), CompareOp.EQUAL, Bytes.toBytes(value));
    filter.setFilterIfMissing(true);
    allFilters.addFilter(filter);
    Scan scan = new Scan();
    scan.addFamily(Bytes.toBytes("trans-blob"));
    scan.addFamily(Bytes.toBytes("trans-type"));
    scan.addFamily(Bytes.toBytes("trans-date"));

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      FlushThread flushThread = new FlushThread();
      flushThread.start();


      Scan scan = new Scan();
      scan.addFamily(family);
      scan.setFilter(new SingleColumnValueFilter(family, qual1, CompareOp.EQUAL,
          new BinaryComparator(Bytes.toBytes(5L))));


      int expectedCount = 0;
      List<Cell> res = new ArrayList<Cell>();

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      region.put(put);


      Scan idxScan = new Scan();
      idxScan.addFamily(family);
      idxScan.setFilter(new FilterList(FilterList.Operator.MUST_PASS_ALL, Arrays.<Filter> asList(
          new SingleColumnValueFilter(family, qual1, CompareOp.GREATER_OR_EQUAL,
              new BinaryComparator(Bytes.toBytes(0L))), new SingleColumnValueFilter(family, qual1,
              CompareOp.LESS_OR_EQUAL, new BinaryComparator(Bytes.toBytes(3L))))));
      InternalScanner scanner = region.getScanner(idxScan);
      List<Cell> res = new ArrayList<Cell>();


      while (scanner.next(res))

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    public boolean verify(byte[] rowKey, byte[] cf, Set<byte[]> columnSet) {
      return columnMap.get(cf).length == columnSet.size();
    }


    public Filter getScanFilter() {
      SingleColumnValueFilter scf = new SingleColumnValueFilter(ESSENTIAL_CF, FILTER_COLUMN,
          CompareFilter.CompareOp.EQUAL, Bytes.toBytes(ACCEPTED_VALUE));
      scf.setFilterIfMissing(true);
      return scf;
    }

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        if (scanner != null) scanner.close();
      }
    }


    protected Scan constructScan(byte[] valuePrefix) throws IOException {
      Filter filter = new SingleColumnValueFilter(
          FAMILY_NAME, QUALIFIER_NAME, CompareFilter.CompareOp.EQUAL,
          new BinaryComparator(valuePrefix)
      );
      Scan scan = new Scan();
      scan.addColumn(FAMILY_NAME, QUALIFIER_NAME);

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        if (scanner != null) scanner.close();
      }
    }


    protected Scan constructScan(byte[] valuePrefix) throws IOException {
      Filter filter = new SingleColumnValueFilter(
          FAMILY_NAME, QUALIFIER_NAME, CompareFilter.CompareOp.EQUAL,
          new BinaryComparator(valuePrefix)
      );
      Scan scan = new Scan();
      scan.addColumn(FAMILY_NAME, QUALIFIER_NAME);

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        if (scanner != null) scanner.close();
      }
    }


    protected Scan constructScan(byte[] valuePrefix) throws IOException {
      Filter filter = new SingleColumnValueFilter(
          FAMILY_NAME, QUALIFIER_NAME, CompareFilter.CompareOp.EQUAL,
          new BinaryComparator(valuePrefix)
      );
      Scan scan = new Scan();
      scan.addColumn(FAMILY_NAME, QUALIFIER_NAME);

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  private ResultScanner buildScanner(String keyPrefix, String value, HTable ht)
      throws IOException {
    // OurFilterList allFilters = new OurFilterList();
    FilterList allFilters = new FilterList(/* FilterList.Operator.MUST_PASS_ALL */);
    allFilters.addFilter(new PrefixFilter(Bytes.toBytes(keyPrefix)));
    SingleColumnValueFilter filter = new SingleColumnValueFilter(Bytes
        .toBytes("trans-tags"), Bytes.toBytes("qual2"), CompareOp.EQUAL, Bytes
        .toBytes(value));
    filter.setFilterIfMissing(true);
    allFilters.addFilter(filter);


    // allFilters.addFilter(new
    // RowExcludingSingleColumnValueFilter(Bytes.toBytes("trans-tags"),
    // Bytes.toBytes("qual2"), CompareOp.EQUAL, Bytes.toBytes(value)));

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  throws IOException {
    // Defaults FilterList.Operator.MUST_PASS_ALL.
    FilterList allFilters = new FilterList();
    allFilters.addFilter(new PrefixFilter(Bytes.toBytes(keyPrefix)));
    // Only return rows where this column value exists in the row.
    SingleColumnValueFilter filter =
      new SingleColumnValueFilter(Bytes.toBytes("trans-tags"),
        Bytes.toBytes("qual2"), CompareOp.EQUAL, Bytes.toBytes(value));
    filter.setFilterIfMissing(true);
    allFilters.addFilter(filter);
    Scan scan = new Scan();
    scan.addFamily(Bytes.toBytes("trans-blob"));
    scan.addFamily(Bytes.toBytes("trans-type"));
    scan.addFamily(Bytes.toBytes("trans-date"));

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    FlushThread flushThread = new FlushThread();
    flushThread.start();


    Scan scan = new Scan();
    scan.addFamily(family);
    scan.setFilter(new SingleColumnValueFilter(family, qual1,
      CompareOp.EQUAL, new BinaryComparator(Bytes.toBytes(5L))));


    int expectedCount = 0;
    List<KeyValue> res = new ArrayList<KeyValue>();

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