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

org.apache.hadoop.hbase.filter.RegExpRowFilter
Implementation of RowFilterInterface that can filter by rowkey regular expression and/or individual column values (equals comparison only). Multiple column filters imply an implicit conjunction of filter criteria. Note that column value filtering in this interface has been replaced by {@link ColumnValueFilter}.

    // Get the filter.  The RegExpRowFilter used should filter out vowels.
    Map<Text, byte[]> colCriteria = new TreeMap<Text, byte[]>();
    for (int i = 0; i < colKeys.length; i++) {
      colCriteria.put(colKeys[i], GOOD_BYTES);
    }
    RowFilterInterface filter = new RegExpRowFilter("[^aeiou]", colCriteria);


    // Create the scanner from the filter.
    HScannerInterface scanner = table.obtainScanner(colKeys, new Text(new 
      String(new char[] { FIRST_ROWKEY })), filter);

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    throws Exception {
    // Get the filter.  The RegExpRowFilter used should filter out vowels and 
    // the WhileMatchRowFilter(StopRowFilter) should filter out all rows 
    // greater than or equal to 'r'.
    Set<RowFilterInterface> filterSet = new HashSet<RowFilterInterface>();
    filterSet.add(new RegExpRowFilter("[^aeiou]"));
    filterSet.add(new WhileMatchRowFilter(new StopRowFilter(new Text("r"))));
    RowFilterInterface filter = 
      new RowFilterSet(RowFilterSet.Operator.MUST_PASS_ALL, filterSet);
    
    // Create the scanner from the filter.

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    // Get the filter.  The RegExpRowFilter used should filter out vowels.
    Map<Text, byte[]> colCriteria = new TreeMap<Text, byte[]>();
    for (int i = 0; i < colKeys.length; i++) {
      colCriteria.put(colKeys[i], GOOD_BYTES);
    }
    RowFilterInterface filter = new RegExpRowFilter("[^aeiou]", colCriteria);


    // Create the scanner from the filter.
    HScannerInterface scanner = table.obtainScanner(colKeys, new Text(new 
      String(new char[] { FIRST_ROWKEY })), filter);

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    throws Exception {
    // Get the filter.  The RegExpRowFilter used should filter out vowels and 
    // the WhileMatchRowFilter(StopRowFilter) should filter out all rows 
    // greater than or equal to 'r'.
    Set<RowFilterInterface> filterSet = new HashSet<RowFilterInterface>();
    filterSet.add(new RegExpRowFilter("[^aeiou]"));
    filterSet.add(new WhileMatchRowFilter(new StopRowFilter(new Text("r"))));
    RowFilterInterface filter = 
      new RowFilterSet(RowFilterSet.Operator.MUST_PASS_ALL, filterSet);
    
    // Create the scanner from the filter.

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 * Expects the entire JSON arg string to consist of the
 * entire regular expression to be used.
 */
public class RegExpRowFilterFactory implements FilterFactory {
  public RowFilterInterface getFilterFromJSON(String args) {
    return new RegExpRowFilter(args);
  }

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