Examples of Scan

cellmate.accumulo.reader.scan.Scan
Returns the internal scan
com.denimgroup.threadfix.data.entities.Scan
net.sf.mzmine.data.Scan
This class represent one spectrum of a raw data file.
org.apache.drill.common.logical.data.Scan
org.apache.hadoop.hbase.client.Scan
Used to perform Scan operations.
All operations are identical to {@link Get} with the exception ofinstantiation. Rather than specifying a single row, an optional startRow and stopRow may be defined. If rows are not specified, the Scanner will iterate over all rows.
To scan everything for each row, instantiate a Scan object.
To modify scanner caching for just this scan, use {@link #setCaching(int) setCaching}. If caching is NOT set, we will use the caching value of the hosting {@link HTable}. See {@link HTable#setScannerCaching(int)}.
To further define the scope of what to get when scanning, perform additional methods as outlined below.
To get all columns from specific families, execute {@link #addFamily(byte[]) addFamily}for each family to retrieve.
To get specific columns, execute {@link #addColumn(byte[],byte[]) addColumn}for each column to retrieve.
To only retrieve columns within a specific range of version timestamps, execute {@link #setTimeRange(long,long) setTimeRange}.
To only retrieve columns with a specific timestamp, execute {@link #setTimeStamp(long) setTimestamp}.
To limit the number of versions of each column to be returned, execute {@link #setMaxVersions(int) setMaxVersions}.
To limit the maximum number of values returned for each call to next(), execute {@link #setBatch(int) setBatch}.
To add a filter, execute {@link #setFilter(org.apache.hadoop.hbase.filter.Filter) setFilter}.
Expert: To explicitly disable server-side block caching for this scan, execute {@link #setCacheBlocks(boolean)}.

Examples of org.apache.hadoop.hbase.client.Scan

        KeyValueTestUtil.create(r1, CF_STR, "a", 5, KeyValue.Type.Put, "dont-care"),
    };
    KeyValueScanner [] scanners = new KeyValueScanner[] {
      new KeyValueScanFixture(KeyValue.COMPARATOR, kvs)
    };
    Scan scanSpec = new Scan(Bytes.toBytes(r1));
    scanSpec.setTimeRange(0, 6);
    scanSpec.setMaxVersions();
    StoreScanner scan =
      new StoreScanner(scanSpec, CF, Long.MAX_VALUE,
        KeyValue.COMPARATOR, getCols("a"), scanners);
    List<KeyValue> results = new ArrayList<KeyValue>();
    assertEquals(true, scan.next(results));
    assertEquals(5, results.size());
    assertEquals(kvs[kvs.length - 1], results.get(0));
    // Scan limited TimeRange
    scanSpec = new Scan(Bytes.toBytes(r1));
    scanSpec.setTimeRange(1, 3);
    scanSpec.setMaxVersions();
    scan = new StoreScanner(scanSpec, CF, Long.MAX_VALUE,
      KeyValue.COMPARATOR, getCols("a"), scanners);
    results = new ArrayList<KeyValue>();
    assertEquals(true, scan.next(results));
    assertEquals(2, results.size());
    // Another range.
    scanSpec = new Scan(Bytes.toBytes(r1));
    scanSpec.setTimeRange(5, 10);
    scanSpec.setMaxVersions();
    scan = new StoreScanner(scanSpec, CF, Long.MAX_VALUE,
      KeyValue.COMPARATOR, getCols("a"), scanners);
    results = new ArrayList<KeyValue>();
    assertEquals(true, scan.next(results));
    assertEquals(1, results.size());
    // See how TimeRange and Versions interact.
    // Another range.
    scanSpec = new Scan(Bytes.toBytes(r1));
    scanSpec.setTimeRange(0, 10);
    scanSpec.setMaxVersions(3);
    scan = new StoreScanner(scanSpec, CF, Long.MAX_VALUE,
      KeyValue.COMPARATOR, getCols("a"), scanners);
    results = new ArrayList<KeyValue>();
    assertEquals(true, scan.next(results));
    assertEquals(3, results.size());

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Examples of org.apache.hadoop.hbase.client.Scan

    };
    KeyValueScanner [] scanners = new KeyValueScanner[] {
      new KeyValueScanFixture(KeyValue.COMPARATOR, kvs)
    };


    Scan scanSpec = new Scan(Bytes.toBytes("R1"));
    // this only uses maxVersions (default=1) and TimeRange (default=all)
    StoreScanner scan =
      new StoreScanner(scanSpec, CF, Long.MAX_VALUE,
          KeyValue.COMPARATOR, getCols("a"),
          scanners);

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Examples of org.apache.hadoop.hbase.client.Scan

    KeyValueScanner [] scanners = new KeyValueScanner[] {
        new KeyValueScanFixture(KeyValue.COMPARATOR,
            kvs)
    };


    Scan scanSpec = new Scan(Bytes.toBytes("R1"));
    // this only uses maxVersions (default=1) and TimeRange (default=all)
    StoreScanner scan =
      new StoreScanner(scanSpec, CF, Long.MAX_VALUE,
          KeyValue.COMPARATOR, getCols("a"),
          scanners);

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Examples of org.apache.hadoop.hbase.client.Scan

        KeyValueTestUtil.create("R1", "cf", "a", 1, KeyValue.Type.Delete, "dont-care"),
    };
    KeyValueScanner [] scanners = new KeyValueScanner[] {
        new KeyValueScanFixture(KeyValue.COMPARATOR, kvs)
    };
    Scan scanSpec = new Scan(Bytes.toBytes("R1"));
    StoreScanner scan =
      new StoreScanner(scanSpec, CF, Long.MAX_VALUE, KeyValue.COMPARATOR,
          getCols("a"), scanners);


    List<KeyValue> results = new ArrayList<KeyValue>();

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Examples of org.apache.hadoop.hbase.client.Scan

        KeyValueTestUtil.create("R2", "cf", "a", 20, KeyValue.Type.Put, "dont-care")
    };
    KeyValueScanner [] scanners = new KeyValueScanner[] {
        new KeyValueScanFixture(KeyValue.COMPARATOR, kvs)
    };
    Scan scanSpec = new Scan(Bytes.toBytes("R1"));
    StoreScanner scan =
      new StoreScanner(scanSpec, CF, Long.MAX_VALUE, KeyValue.COMPARATOR,
          getCols("a"), scanners);


    List<KeyValue> results = new ArrayList<KeyValue>();

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