org.apache.pig.data
Class DataReaderWriter

java.lang.Object
  org.apache.pig.data.DataReaderWriter

@InterfaceAudience.Private
@InterfaceStability.Stable
public class DataReaderWriter
extends Object

This class was used to handle reading and writing of intermediate results of data types. Now that functionality is in BinInterSedes This class could also be used for storing permanent results, it used by BinStorage and Zebra through DefaultTuple class.

Field Summary

static String

UTF8

Constructor Summary

DataReaderWriter()

Method Summary

static DataBag	bytesToBag(DataInput in)
static String	bytesToBigCharArray(DataInput in)
static String	bytesToCharArray(DataInput in)
static InternalMap	bytesToInternalMap(DataInput in)
static Map<String,Object>	bytesToMap(DataInput in)
static Tuple	bytesToTuple(DataInput in)
static org.apache.hadoop.io.Writable	bytesToWritable(DataInput in)
static Object	readDatum(DataInput in)
static Object	readDatum(DataInput in, byte type)
static void	writeDatum(DataOutput out, Object val)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UTF8

public static final String UTF8

See Also:

Constant Field Values

Constructor Detail

DataReaderWriter

public DataReaderWriter()

Method Detail

bytesToTuple

public static Tuple bytesToTuple(DataInput in)
                          throws IOException

Throws:

IOException

bytesToBag

public static DataBag bytesToBag(DataInput in)
                          throws IOException

Throws:

IOException

bytesToMap

public static Map<String,Object> bytesToMap(DataInput in)
                                     throws IOException

Throws:

IOException

bytesToInternalMap

public static InternalMap bytesToInternalMap(DataInput in)
                                      throws IOException

Throws:

IOException

bytesToCharArray

public static String bytesToCharArray(DataInput in)
                               throws IOException

Throws:

IOException

bytesToBigCharArray

public static String bytesToBigCharArray(DataInput in)
                                  throws IOException

Throws:

IOException

bytesToWritable

public static org.apache.hadoop.io.Writable bytesToWritable(DataInput in)
                                                     throws IOException

Throws:

IOException

readDatum

public static Object readDatum(DataInput in)
                        throws IOException,
                               ExecException

Throws:

IOException

ExecException

readDatum

public static Object readDatum(DataInput in,
                               byte type)
                        throws IOException,
                               ExecException

Throws:

IOException

ExecException

writeDatum

public static void writeDatum(DataOutput out,
                              Object val)
                       throws IOException

Throws:

IOException