org.codehaus.activemq.util
Class BitArray

java.lang.Object
  org.codehaus.activemq.util.BitArray

public class BitArray

extends Object

Simple BitArray to enable setting multiple boolean values efficently Used instead of BitSet because BitSet does not allow for efficent serialization. Will store up to 64 boolean values

Version:

$Revision: 1.4 $

Field Summary

(package private) static int	BYTE_SIZE
(package private) static int	INT_SIZE
(package private) static int	LONG_SIZE
(package private) static int	SHORT_SIZE

Constructor Summary

BitArray()

Method Summary

boolean	get(int index)
long	getBits()
int	length()
void	readFromStream(DataInput dataIn) read the bits from an input stream
void	reset() reset all the bit values to false
boolean	set(int index, boolean flag) set the boolean value at the index
void	writeToStream(DataOutput dataOut) write the bits to an output stream

Methods inherited from class java.lang.Object

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

Field Detail

LONG_SIZE

static final int LONG_SIZE

See Also:

Constant Field Values

INT_SIZE

static final int INT_SIZE

See Also:

Constant Field Values

SHORT_SIZE

static final int SHORT_SIZE

See Also:

Constant Field Values

BYTE_SIZE

static final int BYTE_SIZE

See Also:

Constant Field Values

Constructor Detail

BitArray

public BitArray()

Method Detail

length

public int length()

Returns:

the length of bits set

getBits

public long getBits()

Returns:

the long containing the bits

set

public boolean set(int index,
                   boolean flag)

set the boolean value at the index

Parameters:

index -

flag -

Returns:

the old value held at this index

get

public boolean get(int index)

Parameters:

index -

Returns:

the boolean value at this index

reset

public void reset()

reset all the bit values to false

writeToStream

public void writeToStream(DataOutput dataOut)
                   throws IOException

write the bits to an output stream

Parameters:

dataOut -

Throws:

IOException

readFromStream

public void readFromStream(DataInput dataIn)
                    throws IOException

read the bits from an input stream

Parameters:

dataIn -

Throws:

IOException