org.siebengeisslein.util
Class BitMaskUtil

java.lang.Object
  org.siebengeisslein.util.BitMaskUtil

public final class BitMaskUtil
extends java.lang.Object

Layout of oids: bit contain ------------------------ 0..61 oid 62 nofollow flag (in a reference: object should not be loaded on heuristics). 63 new flag (object does not have a final oid yet). Layout of the values in the BTree: ------------------------ 0..61 Position of value in file 61 store file, that contains the entry (datastorestate.getActiveFile()) 62 GC: evaluated 63 GC: references

Field Summary

static long	GC_EVALUATED_MASK
static long	GC_REFERENCED_MASK
static long	NEW_MASK
static long	NO_FOLLOW_MASK
static long	NO_GC_MASK
static long	OID_MASK
static long	POSITION_MASK

Method Summary

static int	getFile(long pos)
static boolean	isGCEvaluated(long oid)
static boolean	isGCReferenced(long oid)
static boolean	isInActiveFile(long pos, int activefile)
static boolean	isNewOID(long oid)
static boolean	isNoFollowOID(long oid)
static long	setBits(int start, int end)
static long	setFile(long pos, int file)
static long	setGCEvaluated(long oid)
static long	setGCReferenced(long oid)
static long	setNoFollow(long oid)
static long	unsetFile(long pos)
static long	unsetGCFlags(long oid)
static long	unsetNoFollowFlag(long oid)

Methods inherited from class java.lang.Object

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

Field Detail

NEW_MASK

public static final long NEW_MASK

See Also:

Constant Field Values

NO_FOLLOW_MASK

public static final long NO_FOLLOW_MASK

See Also:

Constant Field Values

GC_REFERENCED_MASK

public static final long GC_REFERENCED_MASK

See Also:

Constant Field Values

GC_EVALUATED_MASK

public static final long GC_EVALUATED_MASK

See Also:

Constant Field Values

OID_MASK

public static final long OID_MASK

NO_GC_MASK

public static final long NO_GC_MASK

POSITION_MASK

public static final long POSITION_MASK

Method Detail

setBits

public static final long setBits(int start,
                                 int end)

isNewOID

public static final boolean isNewOID(long oid)

isNoFollowOID

public static final boolean isNoFollowOID(long oid)

setGCReferenced

public static final long setGCReferenced(long oid)

isGCReferenced

public static final boolean isGCReferenced(long oid)

setGCEvaluated

public static final long setGCEvaluated(long oid)

isGCEvaluated

public static final boolean isGCEvaluated(long oid)

unsetGCFlags

public static final long unsetGCFlags(long oid)

unsetNoFollowFlag

public static final long unsetNoFollowFlag(long oid)

setNoFollow

public static long setNoFollow(long oid)

isInActiveFile

public static boolean isInActiveFile(long pos,
                                     int activefile)

getFile

public static int getFile(long pos)

setFile

public static long setFile(long pos,
                           int file)

unsetFile

public static long unsetFile(long pos)