net.timewalker.ffmq4.utils

Class FastBitSet

java.lang.Object

net.timewalker.ffmq4.utils.FastBitSet

public final class FastBitSet
extends Object

Simplistic version of the jdk BitSet

No bound-checking, internal capacity must be extended explicitely.

Constructor Summary

Constructors

Constructor and Description
FastBitSet(int nbits) Creates a bit set of size nbits

Method Summary

Modifier and Type	Method and Description
void	clear() Sets all of the bits in this BitSet to false.
void	clear(int bitIndex) Sets the bit specified by the index to false.
void	ensureCapacity(int requiredBits) Ensures that the BitSet can hold enough bits.
boolean	flip(int bitIndex) Sets the bit at the specified index to the complement of its current value.
boolean	get(int bitIndex) Returns the value of the bit with the specified index.
void	set(int bitIndex) Sets the bit at the specified index to true.
int	size() Returns the number of bits of space actually in use by this BitSet to represent bit values.

Methods inherited from class java.lang.Object

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

Constructor Detail

FastBitSet

public FastBitSet(int nbits)

Creates a bit set of size nbits

Parameters:

nbits - the initial size of the bit set.

Method Detail

ensureCapacity

public void ensureCapacity(int requiredBits)

Ensures that the BitSet can hold enough bits.

Parameters:

requiredBits - the required number of bits.

flip

public boolean flip(int bitIndex)

Sets the bit at the specified index to the complement of its current value.

Parameters:

bitIndex - the index of the bit to flip

Returns:

true if the bit was set to, false if it was unset

set

public void set(int bitIndex)

Sets the bit at the specified index to true.

Parameters:

bitIndex - a bit index.

clear

public void clear(int bitIndex)

Sets the bit specified by the index to false.

Parameters:

bitIndex - the index of the bit to be cleared.

clear

public void clear()

Sets all of the bits in this BitSet to false.

get

public boolean get(int bitIndex)

Returns the value of the bit with the specified index. The value is true if the bit with the index bitIndex is currently set in this BitSet; otherwise, the result is false.

Parameters:

bitIndex - the bit index.

Returns:

the value of the bit with the specified index.

size

public int size()

Returns the number of bits of space actually in use by this BitSet to represent bit values. The maximum element in the set is the size - 1st element.

Returns:

the number of bits currently in this bit set.