com.sleepycat.je.utilint

Class BitMap

java.lang.Object

com.sleepycat.je.utilint.BitMap

public class BitMap
extends java.lang.Object

Bitmap which supports indexing with long arguments. java.util.BitSet provides all the functionality and performance we need, but requires integer indexing. Long indexing is implemented by keeping a Map of java.util.BitSets, where each bitset covers 2^16 bits worth of values. The Bitmap may be sparse, in that each segment is only instantiated when needed. Note that this class is currently not thread safe; adding a new bitset segment is not protected.

Constructor Summary

Constructors

Constructor and Description
BitMap()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) int	cardinality()
boolean	get(long index)
(package private) int	getNumSegments()
void	set(long index)

Methods inherited from class java.lang.Object

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

Constructor Detail

BitMap

public BitMap()

Method Detail

set

public void set(long index)
         throws java.lang.IndexOutOfBoundsException

Throws:

java.lang.IndexOutOfBoundsException

get

public boolean get(long index)
            throws java.lang.IndexOutOfBoundsException

Throws:

java.lang.IndexOutOfBoundsException

getNumSegments

int getNumSegments()

cardinality

int cardinality()