de.lmu.ifi.dbs.elki.database.ids.integer

Class TrivialDBIDFactory

java.lang.Object

de.lmu.ifi.dbs.elki.database.ids.integer.TrivialDBIDFactory

All Implemented Interfaces:

DBIDFactory

public class TrivialDBIDFactory
extends Object
implements DBIDFactory

Trivial DBID management, that never reuses IDs and just gives them out in sequence. Statically allocated DBID ranges are given positive values, Dynamically allocated DBIDs are given negative values.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) AtomicInteger	next Keep track of the smallest dynamic DBID offset not used

Fields inherited from interface de.lmu.ifi.dbs.elki.database.ids.DBIDFactory

FACTORY

Constructor Summary

Constructors

Constructor and Description
TrivialDBIDFactory() Constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	deallocateDBIDRange(DBIDRange range) Deallocate a static DBID range.
void	deallocateSingleDBID(DBID id) Return a single DBID for reuse.
DBID	generateSingleDBID() Generate a single DBID
DBIDRange	generateStaticDBIDRange(int size) Generate a static DBID range.
ByteBufferSerializer<DBID>	getDBIDSerializer() Get a serializer for DBIDs
FixedSizeByteBufferSerializer<DBID>	getDBIDSerializerStatic() Get a serializer for DBIDs with static size
Class<? extends DBID>	getTypeRestriction() Get type restriction
DBID	importInteger(int id) Import an integer ID
DBIDPair	makePair(DBID first, DBID second) Make a DBID pair from two existing DBIDs.
ArrayModifiableDBIDs	newArray() Make a new (modifiable) array of DBIDs.
ArrayModifiableDBIDs	newArray(DBIDs existing) Make a new (modifiable) array of DBIDs.
ArrayModifiableDBIDs	newArray(int size) Make a new (modifiable) array of DBIDs.
HashSetModifiableDBIDs	newHashSet() Make a new (modifiable) hash set of DBIDs.
HashSetModifiableDBIDs	newHashSet(DBIDs existing) Make a new (modifiable) hash set of DBIDs.
HashSetModifiableDBIDs	newHashSet(int size) Make a new (modifiable) hash set of DBIDs.
TreeSetModifiableDBIDs	newTreeSet() Make a new (modifiable) tree set of DBIDs.
TreeSetModifiableDBIDs	newTreeSet(DBIDs existing) Make a new (modifiable) tree set of DBIDs.
TreeSetModifiableDBIDs	newTreeSet(int size) Make a new (modifiable) tree set of DBIDs.

Methods inherited from class java.lang.Object

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

Field Detail

next

AtomicInteger next

Keep track of the smallest dynamic DBID offset not used

Constructor Detail

TrivialDBIDFactory

public TrivialDBIDFactory()

Constructor

Method Detail

generateSingleDBID

public DBID generateSingleDBID()

Description copied from interface: DBIDFactory

Generate a single DBID

Specified by:

generateSingleDBID in interface DBIDFactory

Returns:

A single DBID

deallocateSingleDBID

public void deallocateSingleDBID(DBID id)

Description copied from interface: DBIDFactory

Return a single DBID for reuse.

Specified by:

deallocateSingleDBID in interface DBIDFactory

Parameters:

id - DBID to deallocate

generateStaticDBIDRange

public DBIDRange generateStaticDBIDRange(int size)

Description copied from interface: DBIDFactory

Generate a static DBID range.

Specified by:

generateStaticDBIDRange in interface DBIDFactory

Parameters:

size - Requested size

Returns:

DBID range

deallocateDBIDRange

public void deallocateDBIDRange(DBIDRange range)

Description copied from interface: DBIDFactory

Deallocate a static DBID range.

Specified by:

deallocateDBIDRange in interface DBIDFactory

Parameters:

range - Range to deallocate

importInteger

public DBID importInteger(int id)

Description copied from interface: DBIDFactory

Import an integer ID

Specified by:

importInteger in interface DBIDFactory

Parameters:

id - Integer ID to import

Returns:

DBID

newArray

public ArrayModifiableDBIDs newArray()

Description copied from interface: DBIDFactory

Make a new (modifiable) array of DBIDs.

Specified by:

newArray in interface DBIDFactory

Returns:

New array

newHashSet

public HashSetModifiableDBIDs newHashSet()

Description copied from interface: DBIDFactory

Make a new (modifiable) hash set of DBIDs.

Specified by:

newHashSet in interface DBIDFactory

Returns:

New hash set

newTreeSet

public TreeSetModifiableDBIDs newTreeSet()

Description copied from interface: DBIDFactory

Make a new (modifiable) tree set of DBIDs.

Specified by:

newTreeSet in interface DBIDFactory

Returns:

New tree set

newArray

public ArrayModifiableDBIDs newArray(int size)

Description copied from interface: DBIDFactory

Make a new (modifiable) array of DBIDs.

Specified by:

newArray in interface DBIDFactory

Parameters:

size - Size hint

Returns:

New array

newHashSet

public HashSetModifiableDBIDs newHashSet(int size)

Description copied from interface: DBIDFactory

Make a new (modifiable) hash set of DBIDs.

Specified by:

newHashSet in interface DBIDFactory

Parameters:

size - Size hint

Returns:

New hash set

newTreeSet

public TreeSetModifiableDBIDs newTreeSet(int size)

Description copied from interface: DBIDFactory

Make a new (modifiable) tree set of DBIDs.

Specified by:

newTreeSet in interface DBIDFactory

Parameters:

size - Size hint

Returns:

New tree set

newArray

public ArrayModifiableDBIDs newArray(DBIDs existing)

Description copied from interface: DBIDFactory

Make a new (modifiable) array of DBIDs.

Specified by:

newArray in interface DBIDFactory

Parameters:

existing - existing DBIDs to use

Returns:

New array

newHashSet

public HashSetModifiableDBIDs newHashSet(DBIDs existing)

Description copied from interface: DBIDFactory

Make a new (modifiable) hash set of DBIDs.

Specified by:

newHashSet in interface DBIDFactory

Parameters:

existing - existing DBIDs to use

Returns:

New hash set

newTreeSet

public TreeSetModifiableDBIDs newTreeSet(DBIDs existing)

Description copied from interface: DBIDFactory

Make a new (modifiable) tree set of DBIDs.

Specified by:

newTreeSet in interface DBIDFactory

Parameters:

existing - existing DBIDs to use

Returns:

New tree set

makePair

public DBIDPair makePair(DBID first,
                DBID second)

Description copied from interface: DBIDFactory

Make a DBID pair from two existing DBIDs.

Specified by:

makePair in interface DBIDFactory

Parameters:

first - first DBID

second - second DBID

Returns:

new pair.

getDBIDSerializer

public ByteBufferSerializer<DBID> getDBIDSerializer()

Description copied from interface: DBIDFactory

Get a serializer for DBIDs

Specified by:

getDBIDSerializer in interface DBIDFactory

Returns:

DBID serializer

getDBIDSerializerStatic

public FixedSizeByteBufferSerializer<DBID> getDBIDSerializerStatic()

Description copied from interface: DBIDFactory

Get a serializer for DBIDs with static size

Specified by:

getDBIDSerializerStatic in interface DBIDFactory

Returns:

DBID serializer

getTypeRestriction

public Class<? extends DBID> getTypeRestriction()

Description copied from interface: DBIDFactory

Get type restriction

Specified by:

getTypeRestriction in interface DBIDFactory

Returns:

type restriction for DBIDs