Package org.apache.hadoop.hbase.filter

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

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  void doTestPrefixFilter() throws Exception {
    // Grab rows from group one (half of total)
    long expectedRows = this.numRows / 2;
    long expectedKeys = this.colsPerRow;
    Scan s = new Scan();
    s.setFilter(new PrefixFilter(Bytes.toBytes("testRowOne")));
    verifyScan(s, expectedRows, expectedKeys);
  }
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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);
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      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startAndPrefix));
        addAttributes(scan, attributes);
        Filter f = new WhileMatchFilter(
            new PrefixFilter(getBytes(startAndPrefix)));
        scan.setFilter(f);
        if (columns != null && columns.size() != 0) {
          for(ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));
            if(famQf.length == 1) {
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    if (filterCriteria == null) return null;
    if (filterCriteria.startsWith("^")) {
      String regexPattern = filterCriteria.substring(1, filterCriteria.length());
      exportFilter = new RowFilter(CompareOp.EQUAL, new RegexStringComparator(regexPattern));
    } else {
      exportFilter = new PrefixFilter(Bytes.toBytes(filterCriteria));
    }
    return exportFilter;
  }
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  public void testPrefixFilter() throws Exception {
    // Grab rows from group one (half of total)
    long expectedRows = numRows / 2;
    long expectedKeys = colsPerRow;
    Scan s = new Scan();
    s.setFilter(new PrefixFilter(Bytes.toBytes("testRowOne")));
    verifyScan(s, expectedRows, expectedKeys);
  }
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  private InternalScanner buildScanner(String keyPrefix, String value, HRegion r)
      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);
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      } break;
      case PageFilter:
        filter = new PageFilter(Long.valueOf(value));
        break;
      case PrefixFilter:
        filter = new PrefixFilter(Base64.decode(value));
        break;
      case QualifierFilter:
        filter = new QualifierFilter(CompareOp.valueOf(op), comparator.build());
        break;
      case RandomRowFilter:
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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);
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      // Filter the row by its ID
      // The complete key is "tableName/PartSpecs/jobID/taskID"
      // This is a prefix filter, the prefix is "tableName/PartSpecs/JobID", i.e. the taskID is
      // ignored. In SQL, this is equivalent to
      // "Select * FROM tableName where ID LIKE 'tableName/PartSpecs/JobID%';"
      PrefixFilter filter = new PrefixFilter(Bytes.toBytes(rowID));
      scan.setFilter(filter);
      ResultScanner scanner = htable.getScanner(scan);

      for (Result result : scanner) {
        retValue += Long.parseLong(Bytes.toString(result.getValue(family, column)));
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      Scan scan = new Scan();
      // Filter the row by its ID
      // The complete key is "tableName/PartSpecs/jobID/taskID"
      // This is a prefix filter, the prefix is "JobID"
      // In SQL, this is equivalent to "Select * FROM tableName where ID LIKE 'JobID%';"
      PrefixFilter filter = new PrefixFilter(Bytes.toBytes(rowID));
      scan.setFilter(filter);
      ResultScanner scanner = htable.getScanner(scan);
      ArrayList<Delete> toDelete = new ArrayList<Delete>();
      for (Result result : scanner) {
        Delete delete = new Delete(result.getRow());
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