org.eclipse.smila.ipc.bon
Class ValueTrafo

java.lang.Object
  org.eclipse.smila.ipc.bon.ValueTrafo

public final class ValueTrafo
extends java.lang.Object

Helper class to convert between byte arrays and scalar values.

Author:

aweber

Method Summary

static double	byte2double(byte[] b) Reads 8 byte from the byte array and converts them to a double value.
static int	byte2int(byte[] b) Converts given byte array to positive int value assuming result < 2^31.
static long	byte2long(byte[] b) Converts given byte array to positive long value.
static java.lang.String	byte2string(byte[] b) Converts the given byte array to a string by using the default encoding.
static byte[]	double2byte(double d) Converts the given double value to a byte array.
static int	getBytesLength(long v) Get minimum number of bytes to store the long value.
static byte[]	long2byte(long v) Converts positive long value to byte array in Big Endian byte order.
static byte[]	long2byte(long v, int byteLength) Converts positive long value to byte array in Big Endian byte order, assuming the length of the resulting byte array has been calculated before.
static byte[]	string2byte(java.lang.String s) Converts the given string to a byte array using the default encoding (utf-8).

Methods inherited from class java.lang.Object

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

Method Detail

byte2long

public static long byte2long(byte[] b)

Converts given byte array to positive long value.

Parameters:

b - the byte array with length <= 8

Returns:

long value

byte2int

public static int byte2int(byte[] b)

Converts given byte array to positive int value assuming result < 2^31.

Parameters:

b - the byte array with length <= 4

Returns:

int value.

long2byte

public static byte[] long2byte(long v,
                               int byteLength)

Converts positive long value to byte array in Big Endian byte order, assuming the length of the resulting byte array has been calculated before.

Parameters:

v - long value.

byteLength - length of resulting byte array

Returns:

byte array representing the long value

long2byte

public static byte[] long2byte(long v)

Converts positive long value to byte array in Big Endian byte order. The byte array length is the minimum needed to store the value.

Parameters:

v - long value.

Returns:

byte array representing the long value

getBytesLength

public static int getBytesLength(long v)

Get minimum number of bytes to store the long value.

Parameters:

v - long value.

Returns:

minimum length of byte array.

byte2double

public static double byte2double(byte[] b)

Reads 8 byte from the byte array and converts them to a double value.

Parameters:

b - byte array

Returns:

double value. Throws java.nio.BufferUnderflowException, if byte array length < 8.

byte2string

public static java.lang.String byte2string(byte[] b)

Converts the given byte array to a string by using the default encoding.

Parameters:

b - byte array.

Returns:

string value

double2byte

public static byte[] double2byte(double d)

Converts the given double value to a byte array.

Parameters:

d - double value.

Returns:

1 token byte + 8 bytes in Big Endian byte order (IEEE format)

string2byte

public static byte[] string2byte(java.lang.String s)

Converts the given string to a byte array using the default encoding (utf-8).

Parameters:

s - string value.

Returns:

byte representation of string