com.pervasive.datarush.tokens.scalar

Class BinaryDataUtil

java.lang.Object

com.pervasive.datarush.tokens.scalar.BinaryDataUtil

public class BinaryDataUtil
extends Object

Utilities for working with binary data.

Constructor Summary

Constructors

Constructor and Description
BinaryDataUtil()

Method Summary

Modifier and Type	Method and Description
static int	compare(byte[] lhs, byte[] rhs) Compares two byte arrays.
static byte[]	copy(byte[] data) Creates a copy of the specified byte array.
static byte[]	copy(byte[] data, int offset, int length) Creates a copy of a subsequence of the specified byte array.
static byte[]	parseHexBytes(String value) Converts the given hexadecimal string value into a binary value.
static String	toHexString(byte[] value) Converts the given byte array into a string representing the hex values of each byte.

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryDataUtil

public BinaryDataUtil()

Method Detail

copy

public static byte[] copy(byte[] data)

Creates a copy of the specified byte array.

Parameters:

data - the byte array to copy

Returns:

null if the input was null, otherwise a copy of the input array

copy

public static byte[] copy(byte[] data,
                          int offset,
                          int length)

Creates a copy of a subsequence of the specified byte array.

Parameters:

data - the byte array to copy

offset - the initial position of the subsequence in the array

length - the length of the subsequence

Returns:

null if the input was null, otherwise a copy of the subsequence

toHexString

public static String toHexString(byte[] value)

Converts the given byte array into a string representing the hex values of each byte.

Parameters:

value - binary value to convert

Returns:

a hexadecimal string encoding the binary value. If the value was null, the empty string ("") is returned.

parseHexBytes

public static byte[] parseHexBytes(String value)

Converts the given hexadecimal string value into a binary value. The string must contain only value hexadecimal characters. A pair of text characters is required for each byte of output, although the first byte may be represented by only one character if the high nibble is zero. This is handled by filling in with a zero character.

Parameters:

value - String value to convert

Returns:

the byte[] encoded by the string. null is returned, if the encoding string is null.

Throws:

DRException - if the input is not a valid hexadecimal string

compare

public static int compare(byte[] lhs,
                          byte[] rhs)

Compares two byte arrays. Comparison is performed byte-by-byte until either the bytes are unequal or one array has no more bytes, in which case the array with no more bytes is considered lesser.

Parameters:

lhs - Left hand side value

rhs - Right hand side value

Returns:

-1, 0 or 1 indicating less than, equal to, or greater than, respectively