org.apache.pig.impl.util

Class StorageUtil

java.lang.Object

org.apache.pig.impl.util.StorageUtil

public final class StorageUtil
extends Object

This util class provides methods that are shared by storage class PigStorage and streaming class PigStreaming

Field Summary

Fields

Modifier and Type	Field and Description
static StreamingDelimiters	DEFAULT_DELIMITERS

Constructor Summary

Constructors

Constructor and Description
StorageUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static Tuple	bytesToTuple(byte[] buf, int offset, int length, byte fieldDel) Transform bytes from a byte array up to the specified length to a Tuple
static byte	parseFieldDel(String delimiter) Transform a String into a byte representing the field delimiter.
static void	putField(OutputStream out, Object field)
static void	putField(OutputStream out, Object field, boolean includeTypeInformation)
static void	putField(OutputStream out, Object field, StreamingDelimiters delims, boolean includeTypeInformation) Serialize an object to an OutputStream in the field-delimited form.
static Tuple	textToTuple(org.apache.hadoop.io.Text val, byte fieldDel) Transform a line of Text to a Tuple

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DELIMITERS

public static final StreamingDelimiters DEFAULT_DELIMITERS

Constructor Detail

StorageUtil

public StorageUtil()

Method Detail

parseFieldDel

public static byte parseFieldDel(String delimiter)

Transform a String into a byte representing the field delimiter.

Parameters:

delimiter - a string that may be in single-quoted form

Returns:

the field delimiter in byte form

putField

public static void putField(OutputStream out,
            Object field)
                     throws IOException

Throws:

IOException

putField

public static void putField(OutputStream out,
            Object field,
            boolean includeTypeInformation)
                     throws IOException

Throws:

IOException

putField

public static void putField(OutputStream out,
            Object field,
            StreamingDelimiters delims,
            boolean includeTypeInformation)
                     throws IOException

Serialize an object to an OutputStream in the field-delimited form.

Parameters:

out - an OutputStream object

field - an object to be serialized

Throws:

IOException - if serialization fails.

textToTuple

public static Tuple textToTuple(org.apache.hadoop.io.Text val,
                byte fieldDel)

Transform a line of Text to a Tuple

Parameters:

val - a line of text

fieldDel - the field delimiter

Returns:

tuple constructed from the text

bytesToTuple

public static Tuple bytesToTuple(byte[] buf,
                 int offset,
                 int length,
                 byte fieldDel)

Transform bytes from a byte array up to the specified length to a Tuple

Parameters:

buf - the byte array

length - number of bytes to consume from the byte array

fieldDel - the field delimiter

Returns:

tuple constructed from the bytes