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

org.apache.hadoop.hbase.filter.SingleColumnValueExcludeFilter
A {@link Filter} that checks a single column value, but does not emit thetested column. This will enable a performance boost over {@link SingleColumnValueFilter}, if the tested column value is not actually needed as input (besides for the filtering itself).

        if (latestVersion != null) {
          ((SingleColumnValueFilter)filter).setLatestVersionOnly(latestVersion);
        }
        break;
      case SingleColumnValueExcludeFilter:
        filter = new SingleColumnValueExcludeFilter(Base64.decode(family),
          qualifier != null ? Base64.decode(qualifier) : null,
          CompareOp.valueOf(op), comparator.build());
        if (ifMissing != null) {
          ((SingleColumnValueExcludeFilter)filter).setFilterIfMissing(ifMissing);
        }

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      // Check two things:
      // 1. result list contains expected values
      // 2. result list is sorted properly


      Scan scan = new Scan();
      Filter filter = new SingleColumnValueExcludeFilter(cf_essential, col_normal,
          CompareOp.NOT_EQUAL, filtered_val);
      scan.setFilter(filter);
      scan.setLoadColumnFamiliesOnDemand(true);
      InternalScanner s = region.getScanner(scan);

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      // Check two things:
      // 1. result list contains expected values
      // 2. result list is sorted properly


      Scan scan = new Scan();
      Filter filter = new SingleColumnValueExcludeFilter(cf_essential, col_normal,
                                                         CompareOp.NOT_EQUAL, filtered_val);
      scan.setFilter(filter);
      scan.setLoadColumnFamiliesOnDemand(true);
      InternalScanner s = region.getScanner(scan);

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      // Check two things:
      // 1. result list contains expected values
      // 2. result list is sorted properly


      Scan scan = new Scan();
      Filter filter = new SingleColumnValueExcludeFilter(cf_essential, col_normal,
          CompareOp.NOT_EQUAL, filtered_val);
      scan.setFilter(filter);
      scan.setLoadColumnFamiliesOnDemand(true);
      InternalScanner s = region.getScanner(scan);

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            messages = new HTable(conf, MESSAGES_TABLE);
            /* Limit the number of entries scanned to just the mails in this mailbox */
            Scan scan = new Scan(messageRowKey(mailbox.getMailboxId(), Long.MAX_VALUE),
                    messageRowKey(mailbox.getMailboxId(), 0));
            scan.addFamily(MESSAGES_META_CF);
            scan.setFilter(new SingleColumnValueExcludeFilter(MESSAGES_META_CF, FLAGS_SEEN, CompareOp.EQUAL, MARKER_MISSING));
            scan.setCaching(messages.getScannerCaching() * 2);
            scan.setMaxVersions(1);
            scanner = messages.getScanner(scan);
            long count = 0;
            Result result;

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