Package com.googlecode.javaewah

Class BitCounter

  • All Implemented Interfaces:
    BitmapStorage
    public final class BitCounter
extends java.lang.Object
implements BitmapStorage
    BitCounter is a fake bitset data structure. Instead of storing the actual data, it only records the number of set bits.
    Since:
    0.4.0
    Author:
    David McIntosh

    • Constructor Summary

      Constructors 
      Constructor Description
      BitCounter()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void add​(long newdata)
      Virtually add words directly to the bitmap
      void addStreamOfEmptyWords​(boolean v, long number)
      virtually add many zeroes or ones.
      void addStreamOfLiteralWords​(long[] data, int start, int number)
      virtually add several literal words.
      void addStreamOfNegatedLiteralWords​(long[] data, int start, int number)
      virtually add several negated literal words.
      int getCount()
      As you act on this class, it records the number of set (true) bits.
      void setSizeInBits​(int bits)
      should directly set the sizeinbits field, but is effectively ignored in this class.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • BitCounter

        public BitCounter()

    • Method Detail

      • add

        public void add​(long newdata)
        Virtually add words directly to the bitmap
        Specified by:
        add in interface BitmapStorage
        Parameters:
        newdata - the word

      • addStreamOfLiteralWords

        public void addStreamOfLiteralWords​(long[] data,
                                    int start,
                                    int number)
        virtually add several literal words.
        Specified by:
        addStreamOfLiteralWords in interface BitmapStorage
        Parameters:
        data - the literal words
        start - the starting point in the array
        number - the number of literal words to add

      • addStreamOfEmptyWords

        public void addStreamOfEmptyWords​(boolean v,
                                  long number)
        virtually add many zeroes or ones.
        Specified by:
        addStreamOfEmptyWords in interface BitmapStorage
        Parameters:
        v - zeros or ones
        number - how many to words add

      • addStreamOfNegatedLiteralWords

        public void addStreamOfNegatedLiteralWords​(long[] data,
                                           int start,
                                           int number)
        virtually add several negated literal words.
        Specified by:
        addStreamOfNegatedLiteralWords in interface BitmapStorage
        Parameters:
        data - the literal words
        start - the starting point in the array
        number - the number of literal words to add

      • getCount

        public int getCount()
        As you act on this class, it records the number of set (true) bits.
        Returns:
        number of set bits

      • setSizeInBits

        public void setSizeInBits​(int bits)
        should directly set the sizeinbits field, but is effectively ignored in this class.
        Specified by:
        setSizeInBits in interface BitmapStorage
        Parameters:
        bits - number of bits