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

Class BitMaskUtil

  • public class BitMaskUtil
extends java.lang.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

      All Methods Static Methods Concrete Methods 
      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)