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

org.apache.hadoop.hbase.filter.Filter
Interface for row and column filters directly applied within the regionserver. A filter can expect the following call sequence:
- {@link #reset()}
- {@link #filterAllRemaining()} -> true indicates scan is over, false, keep going on.
- {@link #filterRowKey(byte[],int,int)} -> true to drop this row,if false, we will also call
- {@link #filterKeyValue(KeyValue)} -> true to drop this key/value
- {@link #filterRow(List)} -> allows directmodification of the final list to be submitted
- {@link #filterRow()} -> last chance to drop entire row based on the sequence offilterValue() calls. Eg: filter a row if it doesn't contain a specified column.
Filter instances are created one per region/scan. This interface replaces the old RowFilterInterface. When implementing your own filters, consider inheriting {@link FilterBase} to helpyou reduce boilerplate. @see FilterBase

    singleIndexExpression.setRangeExpression(re);


    Scan scan = new Scan();
    scan.setAttribute(Constants.INDEX_EXPRESSION, IndexUtils.toBytes(singleIndexExpression));
    FilterList fl = new FilterList(Operator.MUST_PASS_ALL);
    Filter filter = new SingleColumnValueFilter(FAMILY1, QUALIFIER1, CompareOp.EQUAL, value1);
    fl.addFilter(filter);
    filter = new SingleColumnValueFilter(FAMILY1, QUALIFIER2, CompareOp.EQUAL, value2);
    fl.addFilter(filter);
    filter = new SingleColumnValueFilter(FAMILY1, QUALIFIER3, CompareOp.GREATER_OR_EQUAL, value3_1);
    fl.addFilter(filter);

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    Scan scan = new Scan();
    scan.setAttribute(Constants.INDEX_EXPRESSION, IndexUtils.toBytes(multiIndexExpression));
    FilterList outerFL = new FilterList(Operator.MUST_PASS_ALL);
    FilterList fl = new FilterList(Operator.MUST_PASS_ALL);
    Filter filter = new SingleColumnValueFilter(FAMILY1, QUALIFIER2, CompareOp.EQUAL, value2);
    fl.addFilter(filter);
    filter = new SingleColumnValueFilter(FAMILY1, QUALIFIER3, CompareOp.GREATER_OR_EQUAL, value3_1);
    fl.addFilter(filter);
    filter = new SingleColumnValueFilter(FAMILY1, QUALIFIER3, CompareOp.LESS, value3_2);
    fl.addFilter(filter);

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    public void doAnAction() throws Exception {
      Scan s = new Scan();
      for (byte[] family : targetFamilies) {
        s.addFamily(family);
      }
      Filter filter =
          new SingleColumnValueFilter(FAMILY_A, (Bytes.toString(QUALIFIER_NAME) + "1").getBytes(),
              CompareOp.EQUAL, data);
      s.setFilter(filter);
      ResultScanner scanner = table.getScanner(s);

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    // test put with the indexed column
    Put p = new Put("row1".getBytes());
    p.add("col".getBytes(), "ql".getBytes(), "Val".getBytes());
    table.put(p);
    Scan s = new Scan();
    Filter filter = new ExceptionFilter();
    s.setFilter(filter);
    int i = 0;
    ResultScanner scanner = table.getScanner(s);
    for (Result result : scanner) {
      i++;

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    HTable table = new HTable(conf, userTableName);
    int i = 0;
    Scan s = new Scan();
    FilterList filterList = new FilterList();
    // check for combination of cat in q1 and dog in q1
    Filter filter1 =
        new RowFilter(CompareOp.LESS_OR_EQUAL, new BinaryComparator("row5".getBytes()));
    Filter filter2 = new FirstKeyOnlyFilter();
    filterList.addFilter(filter1);
    filterList.addFilter(filter2);
    s.setFilter(filterList);
    ResultScanner scanner = table.getScanner(s);
    for (Result result : scanner) {

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    HTable table = put4ColumnIndex();
    int i = 0;
    Scan s = new Scan();
    FilterList filterList = new FilterList();
    // check for combination of cat in q1 and dog in q1
    Filter filter1 =
        new SingleColumnValueFilter("col1".getBytes(), "ql".getBytes(), CompareOp.EQUAL,
            "cat".getBytes());
    Filter filter2 =
        new SingleColumnValueFilter("col2".getBytes(), "ql".getBytes(), CompareOp.EQUAL,
            "dog".getBytes());
    filterList.addFilter(filter1);
    filterList.addFilter(filter2);
    s.setFilter(filterList);

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  private int countNumberOfRowsWithFilter(String tableName, String filterVal, boolean isIndexed,
      boolean isCached, int cacheNumber) throws IOException {
    Configuration conf = UTIL.getConfiguration();
    HTable table = new HTable(conf, tableName);
    Scan s = new Scan();
    Filter filter = null;
    if (isIndexed) {
      filter =
          new SingleColumnValueFilter("col".getBytes(), "ql".getBytes(), CompareOp.EQUAL,
              filterVal.getBytes());
    } else {

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    p8.add("col".getBytes(), "ql".getBytes(), "cat".getBytes());
    table.put(p8);


    int i = 0;
    Scan s = new Scan();
    Filter filter = null;
    filter =
        new SingleColumnValueFilter("col".getBytes(), "ql".getBytes(), CompareOp.EQUAL,
            "cat".getBytes());


    s.setFilter(filter);

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    throws IOException {
    Transaction tx = txCodec.getFromOperation(get);
    if (tx != null) {
      get.setMaxVersions(tx.excludesSize() + 1);
      get.setTimeRange(TxUtils.getOldestVisibleTimestamp(ttlByFamily, tx), TxUtils.getMaxVisibleTimestamp(tx));
      Filter newFilter = Filters.combine(getTransactionFilter(tx), get.getFilter());
      get.setFilter(newFilter);
    }
  }

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    throws IOException {
    Transaction tx = txCodec.getFromOperation(scan);
    if (tx != null) {
      scan.setMaxVersions(tx.excludesSize() + 1);
      scan.setTimeRange(TxUtils.getOldestVisibleTimestamp(ttlByFamily, tx), TxUtils.getMaxVisibleTimestamp(tx));
      Filter newFilter = Filters.combine(getTransactionFilter(tx), scan.getFilter());
      scan.setFilter(newFilter);
    }
    return s;
  }

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