hera.util

Class NumberUtils

java.lang.Object

hera.util.NumberUtils

public class NumberUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
NumberUtils()

Method Summary

Modifier and Type	Method and Description
static java.math.BigInteger	byteArrayToPositive(byte[] rawBytes) Convert rawBytes to bigInteger.
static <T> T	convert(java.lang.Number number, java.lang.Class<T> targetClass) Convert number to targetClass type.
static <T> T	parse(java.lang.String text, java.lang.Class<?> clazz) Parse text and convert number.
static <T> T	parse(java.lang.String text, java.lang.Class<T> targetClass, java.text.NumberFormat numberFormat) Parse string text as numberFormat and convert to targetClass type instance.
static byte[]	positiveToByteArray(java.math.BigInteger positiveNumber) Convert BigInteger into a byte array without additional sign byte to represent canonical two's-complement form.

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberUtils

public NumberUtils()

Method Detail

convert

public static <T> T convert(java.lang.Number number,
                            java.lang.Class<T> targetClass)
                     throws java.lang.IllegalArgumentException

Convert number to targetClass type.

Type Parameters:

T - type to convert

Parameters:

number - instance to convert

targetClass - type class to convert

Returns:

converted instance

Throws:

java.lang.IllegalArgumentException - No rule for conversion

parse

public static <T> T parse(java.lang.String text,
                          java.lang.Class<?> clazz)

Parse text and convert number.

Type Parameters:

T - type to convert

Parameters:

text - string to parse

clazz - type class to convert

Returns:

converted instance

parse

public static <T> T parse(java.lang.String text,
                          java.lang.Class<T> targetClass,
                          java.text.NumberFormat numberFormat)

Parse string text as numberFormat and convert to targetClass type instance.

Type Parameters:

T - type to convert

Parameters:

text - string to parse

targetClass - type class to convert

numberFormat - format to parse

Returns:

converted number

positiveToByteArray

public static byte[] positiveToByteArray(java.math.BigInteger positiveNumber)

Convert BigInteger into a byte array without additional sign byte to represent canonical two's-complement form. Eg. 255 is "11111111" not "00000000 1111 1111".

Parameters:

positiveNumber - a positive bigInteger

Returns:

a converted byte array. Empty byte array if positiveNumber is null.

byteArrayToPositive

public static java.math.BigInteger byteArrayToPositive(byte[] rawBytes)

Convert rawBytes to bigInteger. A rawBytes is considered only as positive (no extra sign bit).

Parameters:

rawBytes - a rawBytes representing positive number without sign bit.

Returns:

a converted BigInteger