org.apache.pig.impl.streaming

Class StreamingDelimiters

java.lang.Object

org.apache.pig.impl.streaming.StreamingDelimiters

public class StreamingDelimiters
extends Object

Constructor Summary

Constructors

Constructor and Description
StreamingDelimiters()
StreamingDelimiters(byte preWrapDelim, byte postWrapDelim, boolean useEmptyNull)

Method Summary

Modifier and Type	Method and Description
byte[]	getBagBegin()
byte[]	getBagEnd()
byte[]	getFieldDelim()
byte[]	getMapBegin()
byte[]	getMapEnd()
byte	getMapKeyDelim()
byte[]	getNull()
byte[]	getParamDelim()
byte[]	getRecordEnd()
byte[]	getTupleBegin()
byte[]	getTupleEnd()
static boolean	isDelimiter(byte[] delimiter, byte[] buf, int index, int depth, int endIndex)
int	updateDepth(byte[] buf, int currDepth, int index)

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamingDelimiters

public StreamingDelimiters()

StreamingDelimiters

public StreamingDelimiters(byte preWrapDelim,
                           byte postWrapDelim,
                           boolean useEmptyNull)

Parameters:

preWrapDelim -

postWrapDelim -

useEmptyNull - - In the past empty was used to serialize null. But this can make it impossible to differentiate between an empty string and null. Set to false if you want to use a special character to represent null.

Method Detail

getTupleBegin

public byte[] getTupleBegin()

getTupleEnd

public byte[] getTupleEnd()

getBagBegin

public byte[] getBagBegin()

getBagEnd

public byte[] getBagEnd()

getMapBegin

public byte[] getMapBegin()

getMapEnd

public byte[] getMapEnd()

getFieldDelim

public byte[] getFieldDelim()

getMapKeyDelim

public byte getMapKeyDelim()

getNull

public byte[] getNull()

getParamDelim

public byte[] getParamDelim()

getRecordEnd

public byte[] getRecordEnd()

updateDepth

public int updateDepth(byte[] buf,
                       int currDepth,
                       int index)

Returns:

- The new depth. Depth is increased if at the end of a byte sequence that indicates the start of a bag, tuple, or map. Depth is decreased if at the end of a byte sequence that indicates the end of a bug, tuple, or map.

isDelimiter

public static boolean isDelimiter(byte[] delimiter,
                                  byte[] buf,
                                  int index,
                                  int depth,
                                  int endIndex)

Parameters:

delimiter -

buf -

index -

depth -

endIndex -

Returns:

- True iff the delimiter