org.planx.xmlstore.io
Class LocalLocator

java.lang.Object
  org.planx.xmlstore.io.LocalLocator

All Implemented Interfaces:

Comparable<LocalLocator>, Reference, Locator

public class LocalLocator
extends Object
implements Locator, Comparable<LocalLocator>

A LocalLocator consists of a file offset, a length, and a FileSystemIdentifier. The file offset and the FileSystemIdentifier uniquely identifies a LocalLocator. The length is merely used for efficient de-allocation of the space occupied in the FileSystem.

TODO: Only path compression is currently performed. Add union-by-rank.

Author:

Thomas Ambus

Field Summary

static byte	CLASS_ID
protected LocalLocator	eqref
protected FileSystemIdentifier	fsi
protected int	len
protected int	off

Constructor Summary

LocalLocator(int off, int len, FileSystemIdentifier fsi)

Method Summary

LocalLocator	clone() Careful with this!
int	compareTo(LocalLocator loc)
boolean	equals(Object o)
protected LocalLocator	find()
static Discriminator<LocalLocator>	getDiscriminator(Memory memory)
FileSystemIdentifier	getFileSystemId()
int	getLen()
int	getOff()
static Streamer<LocalLocator>	getStreamer(boolean isCompact)
int	hashCode()
boolean	isContained(LocalLocator l)
void	locatorMoved(LocalLocator loc)
void	setFileSystemId(FileSystemIdentifier fsi)
String	toString()

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

CLASS_ID

public static final byte CLASS_ID

See Also:

Constant Field Values

off

protected int off

len

protected int len

fsi

protected FileSystemIdentifier fsi

eqref

protected LocalLocator eqref

Constructor Detail

LocalLocator

public LocalLocator(int off,
                    int len,
                    FileSystemIdentifier fsi)

Method Detail

clone

public LocalLocator clone()

Careful with this! It breaks union-find for in-memory locators.

Overrides:

clone in class Object

find

protected LocalLocator find()

getFileSystemId

public FileSystemIdentifier getFileSystemId()

setFileSystemId

public void setFileSystemId(FileSystemIdentifier fsi)

locatorMoved

public void locatorMoved(LocalLocator loc)

getOff

public int getOff()

getLen

public int getLen()

isContained

public boolean isContained(LocalLocator l)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public int compareTo(LocalLocator loc)

Specified by:

compareTo in interface Comparable<LocalLocator>

toString

public String toString()

Overrides:

toString in class Object

getStreamer

public static Streamer<LocalLocator> getStreamer(boolean isCompact)

getDiscriminator

public static Discriminator<LocalLocator> getDiscriminator(Memory memory)