Package dev.aherscu.qa.testing.utils

Class NumberUtils

java.lang.Object

dev.aherscu.qa.testing.utils.NumberUtils

public final class NumberUtils
extends Object

Number utilities.

Author:

aherscu

Method Summary

Modifier and Type	Method	Description
static Number	numericValueOf(String text, Class<? extends Number>... expectedNumericType)	Tries to call valueOf(String) on specified numeric type with specified text.
static int	parseIntOrZero(String value)	Safely parses specified integer.
static long	parseLongOrZero(String value)	Safely parses specified long.
static double	safeDoubleOf(Number number)	Returns a double even if no number was supplied.

Methods inherited from class java.lang.Object

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

Method Detail

numericValueOf

@SafeVarargs
public static Number numericValueOf(String text,
                                    Class<? extends Number>... expectedNumericType)

Tries to call valueOf(String) on specified numeric type with specified text.

NOTE: There is no generic method for parsing text into any given Number subtype; this method will work for part of these subtypes, for others will just throw an UnsupportedOperationException:

• Byte.valueOf(String)
• Short.valueOf(String)
• Integer.valueOf(String)
• Long.valueOf(String)
• Float.valueOf(String)
• Double.valueOf(String)

Parameters:

text - the text containing numeric value

expectedNumericType - the expected numeric type; optional, assuming Double if not provided

Returns:

the numeric value

Throws:

UnsupportedOperationException - if failed to call the valueOf method on expected number type

parseIntOrZero

public static int parseIntOrZero(String value)

Safely parses specified integer.

Parameters:

value - integer value as string

Returns:

the integer value if parsed successfully, otherwise 0

parseLongOrZero

public static long parseLongOrZero(String value)

Safely parses specified long.

Parameters:

value - long value as string

Returns:

the long value if parsed successfully, otherwise 0

safeDoubleOf

public static double safeDoubleOf(Number number)

Returns a double even if no number was supplied.

Parameters:

number - the number

Returns:

the double representation of the supplied number or Double.NaN if no number was supplied.