javaewah32
Class BitCounter32

java.lang.Object
  javaewah32.BitCounter32

All Implemented Interfaces:

BitmapStorage32

public final class BitCounter32
extends Object
implements BitmapStorage32

BitCounter is a fake bitset data structure. Instead of storing the actual data, it only records the number of set bits.

Since:

0.5.0

Author:

Daniel Lemire and David McIntosh

Constructor Summary

BitCounter32()

Method Summary

void	add(int newdata) Virtually add words directly to the bitmap
void	addStreamOfDirtyWords(int[] data, int start, int number) virtually add several dirty words.
void	addStreamOfEmptyWords(boolean v, int number) virtually add many zeroes or ones.
void	addStreamOfNegatedDirtyWords(int[] data, int start, int number) virtually add several negated dirty 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

BitCounter32

public BitCounter32()

Method Detail

add

public void add(int newdata)

Virtually add words directly to the bitmap

Specified by:

add in interface BitmapStorage32

Parameters:

newdata - the word

addStreamOfDirtyWords

public void addStreamOfDirtyWords(int[] data,
                                  int start,
                                  int number)

virtually add several dirty words.

Specified by:

addStreamOfDirtyWords in interface BitmapStorage32

Parameters:

data - the dirty words

start - the starting point in the array

number - the number of dirty words to add

addStreamOfEmptyWords

public void addStreamOfEmptyWords(boolean v,
                                  int number)

virtually add many zeroes or ones.

Specified by:

addStreamOfEmptyWords in interface BitmapStorage32

Parameters:

v - zeros or ones

number - how many to words add

addStreamOfNegatedDirtyWords

public void addStreamOfNegatedDirtyWords(int[] data,
                                         int start,
                                         int number)

virtually add several negated dirty words.

Specified by:

addStreamOfNegatedDirtyWords in interface BitmapStorage32

Parameters:

data - the dirty words

start - the starting point in the array

number - the number of dirty 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 BitmapStorage32

Parameters:

bits - number of bits