Package org.camunda.bpm.engine.impl.util

Class BitMaskUtil

java.lang.Object

org.camunda.bpm.engine.impl.util.BitMaskUtil

public class BitMaskUtil
extends Object

Util class for manipulating bit-flag in ints. Currently, only 8-bits are supporten, but can be extended to use all 31 bits in the integer (1st of 32 bits is used for sign).

Author:

Frederik Heremans

Constructor Summary

Constructors

Constructor	Description
BitMaskUtil()

Method Summary

Modifier and Type	Method	Description
static int	getMaskForBit(int bitNumber)
static boolean	isBitOn(int value, int bitNumber)	Check if the bit is set to '1'
static int	setBit(int value, int bitNumber, boolean bitValue)	Set bit to '0' or '1' in the given int.
static int	setBitOff(int value, int bitNumber)	Set bit to '0' in the given int.
static int	setBitOn(int value, int bitNumber)	Set bit to '1' in the given int.

Methods inherited from class java.lang.Object

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

Constructor Detail

BitMaskUtil

public BitMaskUtil()

Method Detail

setBitOn

public static int setBitOn(int value,
                           int bitNumber)

Set bit to '1' in the given int.

Parameters:

current - integer value

bitNumber - number of the bit to set to '1' (right first bit starting at 1).

setBitOff

public static int setBitOff(int value,
                            int bitNumber)

Set bit to '0' in the given int.

Parameters:

current - integer value

bitNumber - number of the bit to set to '0' (right first bit starting at 1).

isBitOn

public static boolean isBitOn(int value,
                              int bitNumber)

Check if the bit is set to '1'

Parameters:

value - integer to check bit

number - of bit to check (right first bit starting at 1)

setBit

public static int setBit(int value,
                         int bitNumber,
                         boolean bitValue)

Set bit to '0' or '1' in the given int.

Parameters:

current - integer value

bitNumber - number of the bit to set to '0' or '1' (right first bit starting at 1).

bitValue - if true, bit set to '1'. If false, '0'.

getMaskForBit

public static int getMaskForBit(int bitNumber)