javaewah
Class BitCounter

java.lang.Object
  javaewah.BitCounter

All Implemented Interfaces:

BitmapStorage

public final class BitCounter
extends 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

BitCounter()

Method Summary

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

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

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

addStreamOfDirtyWords

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

virtually add several dirty words.

Specified by:

addStreamOfDirtyWords in interface BitmapStorage

Parameters:

data - the dirty words

start - the starting point in the array

number - the number of dirty words to add

addStreamOfNegatedDirtyWords

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

virtually add several negated dirty words.

Specified by:

addStreamOfNegatedDirtyWords in interface BitmapStorage

Parameters:

data - the dirty words

start - the starting point in the array

number - the number of dirty words to add

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

getCount

public int getCount()

As you act on this class, it records the number of set (true) bits.

Returns:

number of set bits