com.phloc.commons.lang

Class BitSetHelper

java.lang.Object

com.phloc.commons.lang.BitSetHelper

@Immutable
public final class BitSetHelper
extends Object

Helper class to work with bit sets.

Author:

Philip Helger

Method Summary

Methods

Modifier and Type	Method and Description
static BitSet	createBitSet(byte nValue) Convert the passed byte value to an bit set of size 8.
static BitSet	createBitSet(int nValue) Convert the passed int value to an bit set of size 32.
static BitSet	createBitSet(long nValue) Convert the passed long value to an bit set of size 64.
static BitSet	createBitSet(short nValue) Convert the passed short value to an bit set of size 16.
static int	getExtractedIntValue(BitSet aBS) Extract the int representation of the passed bit set.
static long	getExtractedLongValue(BitSet aBS) Extract the long representation of the passed bit set.

Methods inherited from class java.lang.Object

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

Method Detail

createBitSet

@Nonnull
public static BitSet createBitSet(byte nValue)

Convert the passed byte value to an bit set of size 8.

Parameters:

nValue - The value to be converted to a bit set.

Returns:

The non-null bit set.

createBitSet

@Nonnull
public static BitSet createBitSet(short nValue)

Convert the passed short value to an bit set of size 16.

Parameters:

nValue - The value to be converted to a bit set.

Returns:

The non-null bit set.

createBitSet

@Nonnull
public static BitSet createBitSet(int nValue)

Convert the passed int value to an bit set of size 32.

Parameters:

nValue - The value to be converted to a bit set.

Returns:

The non-null bit set.

createBitSet

@Nonnull
public static BitSet createBitSet(long nValue)

Convert the passed long value to an bit set of size 64.

Parameters:

nValue - The value to be converted to a bit set.

Returns:

The non-null bit set.

getExtractedIntValue

public static int getExtractedIntValue(@Nonnull
                       BitSet aBS)

Extract the int representation of the passed bit set. To avoid loss of data, the bit set may not have more than 32 bits.

Parameters:

aBS - The bit set to extract the value from. May not be null.

Returns:

The extracted value. May be negative if the bit set has 32 elements, the highest order bit is set.

getExtractedLongValue

public static long getExtractedLongValue(@Nonnull
                         BitSet aBS)

Extract the long representation of the passed bit set. To avoid loss of data, the bit set may not have more than 64 bits.

Parameters:

aBS - The bit set to extract the value from. May not be null.

Returns:

The extracted value. May be negative if the bit set has 64 elements, the highest order bit is set.