org.apache.paimon.utils

类 MathUtils

java.lang.Object

org.apache.paimon.utils.MathUtils

public class MathUtils
extends Object

Collection of simple mathematical routines.

构造器概要

构造器

构造器和说明
MathUtils()

方法概要

限定符和类型	方法和说明
static boolean	isPowerOf2(long value) Checks whether the given value is a power of two.
static int	log2strict(int value) Computes the logarithm of the given value to the base of 2.
static Integer	max(Integer v1, Integer v2)
static Integer	min(Integer v1, Integer v2)
static int	roundDownToPowerOf2(int value) Decrements the given number down to the closest power of two.

从类继承的方法 java.lang.Object

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

构造器详细资料

MathUtils

public MathUtils()

方法详细资料

roundDownToPowerOf2

public static int roundDownToPowerOf2(int value)

Decrements the given number down to the closest power of two. If the argument is a power of two, it remains unchanged.

参数:

value - The value to round down.

返回:

The closest value that is a power of two and less or equal than the given value.

isPowerOf2

public static boolean isPowerOf2(long value)

Checks whether the given value is a power of two.

参数:

value - The value to check.

返回:

True, if the value is a power of two, false otherwise.

log2strict

public static int log2strict(int value)
                      throws ArithmeticException,
                             IllegalArgumentException

Computes the logarithm of the given value to the base of 2. This method throws an error, if the given argument is not a power of 2.

参数:

value - The value to compute the logarithm for.

返回:

The logarithm to the base of 2.

抛出:

ArithmeticException - Thrown, if the given value is zero.

IllegalArgumentException - Thrown, if the given value is not a power of two.

max

public static Integer max(Integer v1,
                          Integer v2)

min

public static Integer min(Integer v1,
                          Integer v2)