org.apache.hadoop.mapred.nativetask.util

Class BytesUtil

java.lang.Object

org.apache.hadoop.mapred.nativetask.util.BytesUtil

@InterfaceAudience.Private
public class BytesUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
BytesUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	toBytes(boolean b) Convert a boolean to a byte array.
static byte[]	toBytes(double d) Serialize a double as the IEEE 754 double format output.
static byte[]	toBytes(float f)
static double	toDouble(byte[] bytes)
static double	toDouble(byte[] bytes, int offset)
static float	toFloat(byte[] bytes) Presumes float encoded as IEEE 754 floating-point "single format"
static float	toFloat(byte[] bytes, int offset) Presumes float encoded as IEEE 754 floating-point "single format"
static int	toInt(byte[] bytes, int offset) Convert a big-endian integer from a byte array to a primitive value.
static long	toLong(byte[] bytes, int offset) Converts a big-endian byte array to a long value.
static String	toStringBinary(byte[] b) Write a printable representation of a byte array.
static String	toStringBinary(byte[] b, int off, int len) Write a printable representation of a byte array.

Methods inherited from class java.lang.Object

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

Constructor Detail

BytesUtil

public BytesUtil()

Method Detail

toLong

public static long toLong(byte[] bytes,
                          int offset)

Converts a big-endian byte array to a long value.

Parameters:

bytes - array of bytes

offset - offset into array

toInt

public static int toInt(byte[] bytes,
                        int offset)

Convert a big-endian integer from a byte array to a primitive value.

Parameters:

bytes - the array to parse from

offset - the offset in the array

toFloat

public static float toFloat(byte[] bytes)

Presumes float encoded as IEEE 754 floating-point "single format"

Parameters:

bytes - byte array

Returns:

Float made from passed byte array.

toFloat

public static float toFloat(byte[] bytes,
                            int offset)

Presumes float encoded as IEEE 754 floating-point "single format"

Parameters:

bytes - array to convert

offset - offset into array

Returns:

Float made from passed byte array.

toDouble

public static double toDouble(byte[] bytes)

Parameters:

bytes - byte array

Returns:

Return double made from passed bytes.

toDouble

public static double toDouble(byte[] bytes,
                              int offset)

Parameters:

bytes - byte array

offset - offset where double is

Returns:

Return double made from passed bytes.

toStringBinary

public static String toStringBinary(byte[] b)

Write a printable representation of a byte array.

Parameters:

b - byte array

Returns:

the printable presentation

See Also:

toStringBinary(byte[], int, int)

toStringBinary

public static String toStringBinary(byte[] b,
                                    int off,
                                    int len)

Write a printable representation of a byte array. Non-printable characters are hex escaped in the format \\x%02X, eg: \x00 \x05 etc

Parameters:

b - array to write out

off - offset to start at

len - length to write

Returns:

string output

toBytes

public static byte[] toBytes(boolean b)

Convert a boolean to a byte array. True becomes -1 and false becomes 0.

Parameters:

b - value

Returns:

b encoded in a byte array.

toBytes

public static byte[] toBytes(float f)

Parameters:

f - float value

Returns:

the float represented as byte []

toBytes

public static byte[] toBytes(double d)

Serialize a double as the IEEE 754 double format output. The resultant array will be 8 bytes long.

Parameters:

d - value

Returns:

the double represented as byte []