Package org.apache.hadoop.hbase.filter

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

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  }

  @Test
  public void testSumWithFilter() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setFilter(f);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Long sum = null;
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  @Test
  public void testAvgWithFilter() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY,TEST_QUALIFIER);
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    scan.setFilter(f);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Double avg = null;
    avg = aClient.avg(TEST_TABLE, ci, scan);
    assertEquals(Double.NaN, avg, 0);
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  }

  @Test
  public void testStdWithFilter() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setFilter(f);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Double std = null;
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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 testFilters() throws IOException {
    try {
      this.r = createNewHRegion(TESTTABLEDESC, null, null);
      addContent(this.r, HConstants.CATALOG_FAMILY);
      byte [] prefix = Bytes.toBytes("ab");
      Filter newFilter = new PrefixFilter(prefix);
      Scan scan = new Scan();
      scan.setFilter(newFilter);
      rowPrefixFilter(scan);

      byte[] stopRow = Bytes.toBytes("bbc");
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    arr.add("universe");
    obj = doType(conf,  arr, ArrayList.class);
    assertTrue(obj instanceof ArrayList);
    Assert.assertArrayEquals(list.toArray(), ((ArrayList)obj).toArray() );
    // Check that filters can be serialized
    obj = doType(conf, new PrefixFilter(HConstants.EMPTY_BYTE_ARRAY),
      PrefixFilter.class);
    assertTrue(obj instanceof PrefixFilter);
  }
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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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      // Test filters are serialized properly.
      scan = new Scan(startRow);
      final String name = "testScan";
      byte [] prefix = Bytes.toBytes(name);
      scan.setFilter(new PrefixFilter(prefix));
      sb = Writables.getBytes(scan);
      desScan = (Scan)Writables.getWritable(sb, new Scan());
      Filter f = desScan.getFilter();
      assertTrue(f instanceof PrefixFilter);
    }
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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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        throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startAndPrefix));
        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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