org.apache.tinkerpop.gremlin.util

Class NumberHelper

java.lang.Object

org.apache.tinkerpop.gremlin.util.NumberHelper

public final class NumberHelper
extends Object

Author:

Daniel Kuppitz (http://gremlin.guru)

Field Summary

Fields

Modifier and Type	Field and Description
BiFunction<Number,Number,Number>	add
BiFunction<Number,Number,Integer>	cmp
BiFunction<Number,Number,Number>	div
BiFunction<Number,Number,Number>	max
BiFunction<Number,Number,Number>	min
BiFunction<Number,Number,Number>	mul
BiFunction<Number,Number,Number>	sub

Method Summary

Modifier and Type	Method and Description
static Number	add(Number a, Number b) Adds two numbers returning the highest common number class between them.
static boolean	bothAreNaN(Object first, Object second)
static Integer	compare(Number a, Number b) Compares two numbers.
static Number	div(Number a, Number b) Divides two numbers returning the highest common number class between them calling div(Number, Number, boolean) with a false.
static Number	div(Number a, Number b, boolean forceFloatingPoint) Divides two numbers returning the highest common number class between them.
static boolean	eitherAreNaN(Object first, Object second)
static Class<? extends Number>	getHighestCommonNumberClass(boolean forceFloatingPoint, Number... numbers)
static Class<? extends Number>	getHighestCommonNumberClass(Number... numbers)
static boolean	isNaN(Object object)
static boolean	isNegativeInfinity(Object value)
static boolean	isPositiveInfinity(Object value)
static Comparable	max(Comparable a, Comparable b) Gets the larger number of the two provided returning the highest common number class between them.
static Number	max(Number a, Number b) Gets the larger number of the two provided returning the highest common number class between them.
static Comparable	min(Comparable a, Comparable b) Gets the smaller number of the two provided returning the highest common number class between them.
static Number	min(Number a, Number b) Gets the smaller number of the two provided returning the highest common number class between them.
static Number	mul(Number a, Number b) Multiplies two numbers returning the highest common number class between them.
static Number	sub(Number a, Number b) Subtracts two numbers returning the highest common number class between them.

Methods inherited from class java.lang.Object

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

Field Detail

add

public final BiFunction<Number,Number,Number> add

sub

public final BiFunction<Number,Number,Number> sub

mul

public final BiFunction<Number,Number,Number> mul

div

public final BiFunction<Number,Number,Number> div

min

public final BiFunction<Number,Number,Number> min

max

public final BiFunction<Number,Number,Number> max

cmp

public final BiFunction<Number,Number,Integer> cmp

Method Detail

getHighestCommonNumberClass

public static Class<? extends Number> getHighestCommonNumberClass(Number... numbers)

getHighestCommonNumberClass

public static Class<? extends Number> getHighestCommonNumberClass(boolean forceFloatingPoint,
                                                                  Number... numbers)

add

public static Number add(Number a,
                         Number b)

Adds two numbers returning the highest common number class between them.

     a = 1, b = 1 -> 2
     a = null, b = 1 -> null
     a = 1, b = null -> 1
     a = null, b = null -> null
 

Parameters:

a - should be thought of as the seed to be modified by b

b - the modifier to {code a}

sub

public static Number sub(Number a,
                         Number b)

Subtracts two numbers returning the highest common number class between them.

     a = 1, b = 1 -> 0
     a = null, b = 1 -> null
     a = 1, b = null -> 1
     a = null, b = null -> null
 

Parameters:

a - should be thought of as the seed to be modified by b

b - the modifier to {code a}

mul

public static Number mul(Number a,
                         Number b)

Multiplies two numbers returning the highest common number class between them.

     a = 1, b = 2 -> 2
     a = null, b = 1 -> null
     a = 1, b = null -> 1
     a = null, b = null -> null
 

Parameters:

a - should be thought of as the seed to be modified by b

b - the modifier to {code a}

div

public static Number div(Number a,
                         Number b)

Divides two numbers returning the highest common number class between them calling div(Number, Number, boolean) with a false.

div

public static Number div(Number a,
                         Number b,
                         boolean forceFloatingPoint)

Divides two numbers returning the highest common number class between them.

     a = 4, b = 2 -> 2
     a = null, b = 1 -> null
     a = 1, b = null -> 1
     a = null, b = null -> null
 

Parameters:

a - should be thought of as the seed to be modified by b

b - the modifier to {code a}

forceFloatingPoint - when set to true ensures that the return value is the highest common floating number class

min

public static Number min(Number a,
                         Number b)

Gets the smaller number of the two provided returning the highest common number class between them.

     a = 4, b = 2 -> 2
     a = null, b = 1 -> 1
     a = 1, b = null -> 1
     a = null, b = null -> null
     a = NaN, b = 1 -> 1
     a = 1, b = NaN -> 1
     a = NaN, b = NaN -> NaN
 

min

public static Comparable min(Comparable a,
                             Comparable b)

Gets the smaller number of the two provided returning the highest common number class between them.

     a = 4, b = 2 -> 2
     a = null, b = 1 -> 1
     a = 1, b = null -> 1
     a = null, b = null -> null
     a = NaN, b = 1 -> 1
     a = 1, b = NaN -> 1
     a = NaN, b = NaN -> NaN
 

max

public static Number max(Number a,
                         Number b)

Gets the larger number of the two provided returning the highest common number class between them.

     a = 4, b = 2 -> 4
     a = null, b = 1 -> 1
     a = 1, b = null -> 1
     a = null, b = null -> null
     a = NaN, b = 1 -> 1
     a = 1, b = NaN -> 1
     a = NaN, b = NaN -> NaN
 

max

public static Comparable max(Comparable a,
                             Comparable b)

Gets the larger number of the two provided returning the highest common number class between them.

     a = 4, b = 2 -> 4
     a = null, b = 1 -> 1
     a = 1, b = null -> 1
     a = null, b = null -> null
     a = NaN, b = 1 -> 1
     a = 1, b = NaN -> 1
     a = NaN, b = NaN -> NaN
 

compare

public static Integer compare(Number a,
                              Number b)

Compares two numbers. Follows orderability semantics for NaN, which places NaN after +Inf.

     a = 4, b = 2 -> 1
     a = 2, b = 4 -> -1
     a = null, b = 1 -> -1
     a = 1, b = null -> 1
     a = null, b = null -> 0
     a = NaN, b = NaN -> 0
     a = NaN, b = Inf -> 1
 

isNaN

public static boolean isNaN(Object object)

eitherAreNaN

public static boolean eitherAreNaN(Object first,
                                   Object second)

bothAreNaN

public static boolean bothAreNaN(Object first,
                                 Object second)

isPositiveInfinity

public static boolean isPositiveInfinity(Object value)

isNegativeInfinity

public static boolean isNegativeInfinity(Object value)