org.apache.paimon.utils

Class MathUtils

java.lang.Object

org.apache.paimon.utils.MathUtils

public class MathUtils
extends Object

Collection of simple mathematical routines.

Constructor Summary

Constructors

Constructor and Description
MathUtils()

Method Summary

Modifier and Type	Method and Description
static int	addSafely(int a, int b) Safely add the given int value by another int value, ensuring that no overflow occurs.
static int	incrementSafely(int a) Safely increments the given int value by one, ensuring that no overflow occurs.
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.

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtils

public MathUtils()

Method Detail

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.

Parameters:

value - The value to round down.

Returns:

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.

Parameters:

value - The value to check.

Returns:

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.

Parameters:

value - The value to compute the logarithm for.

Returns:

The logarithm to the base of 2.

Throws:

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)

incrementSafely

public static int incrementSafely(int a)

Safely increments the given int value by one, ensuring that no overflow occurs.

addSafely

public static int addSafely(int a,
                            int b)

Safely add the given int value by another int value, ensuring that no overflow occurs.