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com.cosylab.util
Class BitSetUtilities

java.lang.Object
  com.cosylab.util.BitSetUtilities

public final class BitSetUtilities
extends java.lang.Object

BitSetUtilities containes usefull clases to manipulate with BitSet.

Since:

Dec 22, 2003.

Version:

$Id: BitSetUtilities.java,v 1.4 2008-04-22 12:26:29 jbobnar Exp $

Author:

Igor Kriznar

Method Summary

static java.util.BitSet	forLong(long value) Converts long value to BitSet.
static long	getMaskedValue(long bits, long mask) Returns bit pattern by ignoring all zeros in the mask.
static long	toLong(java.util.BitSet value) Converts BitSet to long value if possible.

Methods inherited from class java.lang.Object

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

Method Detail

forLong

public static java.util.BitSet forLong(long value)

Converts long value to BitSet.

Parameters:

value - the long value

Returns:

the BitSet corresponding to the value

toLong

public static long toLong(java.util.BitSet value)

Converts BitSet to long value if possible.

Parameters:

value - the BitSet object

Returns:

long representatnion of the bit set

Throws:

java.lang.NullPointerException - DOCUMENT ME!

getMaskedValue

public static long getMaskedValue(long bits,
                                  long mask)

Returns bit pattern by ignoring all zeros in the mask. If mask is less than 0, return value is equal to bits parameter.

Example:
mask = XX10101 bits = XX10010 getCompactValue() = XXXXX100

Parameters:

bits - bit pattern as long value

mask - mask which tells, which bits in pattern are visible, if less than 0, maks is ignored

Returns:

long maksed representation of the bit pattern.