org.hsqldb.index

Class NodeAVLDisk

java.lang.Object

org.hsqldb.index.NodeAVL

org.hsqldb.index.NodeAVLDisk

All Implemented Interfaces:

CachedObject

public class NodeAVLDisk
extends NodeAVL

Cached table Node implementation.

Only integral references to left, right and parent nodes in the AVL tree are held and used as pointers data.

iId is a reference to the Index object that contains this node.
This fields can be eliminated in the future, by changing the method signatures to take a Index parameter from Index.java (fredt@users) New class derived from Hypersonic SQL code and enhanced in HSQLDB.

Since:

Hypersonic SQL

Field Summary

Fields

Modifier and Type	Field and Description
static int	SIZE_IN_BYTE

Fields inherited from class org.hsqldb.index.NodeAVL

iBalance, nNext

Fields inherited from interface org.hsqldb.persist.CachedObject

emptyArray

Constructor Summary

Constructors

Constructor and Description
NodeAVLDisk(RowAVLDisk r, int id)
NodeAVLDisk(RowAVLDisk r, RowInputInterface in, int id)

Method Summary

Modifier and Type	Method and Description
NodeAVL	child(PersistentStore store, boolean isleft)
void	delete()
void	destroy()
int	getAccessCount()
int	getBalance(PersistentStore store)
java.lang.Object[]	getData(PersistentStore store)
long	getPos()
int	getRealSize(RowOutputInterface out)
RowAVL	getRow(PersistentStore store)
int	getStorageSize()
boolean	hasChanged()
boolean	isInMemory()
boolean	isKeepInMemory()
boolean	isMemory()
boolean	isNew()
boolean	keepInMemory(boolean keep)
void	replace(PersistentStore store, Index index, NodeAVL n)
void	restore()
NodeAVL	set(PersistentStore store, boolean isLeft, NodeAVL n)
NodeAVL	setBalance(PersistentStore store, int b)
void	setInMemory(boolean in)
void	setPos(long pos)
void	setStorageSize(int size)
void	updateAccessCount(int count)
void	write(RowOutputInterface out)
void	write(RowOutputInterface out, LongLookup lookup)

Methods inherited from class org.hsqldb.index.NodeAVL

getDefaultCapacity, isBlock, read

Methods inherited from class java.lang.Object

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

Field Detail

SIZE_IN_BYTE

public static final int SIZE_IN_BYTE

See Also:

Constant Field Values

Constructor Detail

NodeAVLDisk

public NodeAVLDisk(RowAVLDisk r,
                   RowInputInterface in,
                   int id)
            throws java.io.IOException

Throws:

java.io.IOException

NodeAVLDisk

public NodeAVLDisk(RowAVLDisk r,
                   int id)

Method Detail

delete

public void delete()

Overrides:

delete in class NodeAVL

isInMemory

public boolean isInMemory()

Specified by:

isInMemory in interface CachedObject

Overrides:

isInMemory in class NodeAVL

isMemory

public boolean isMemory()

Specified by:

isMemory in interface CachedObject

Overrides:

isMemory in class NodeAVL

getPos

public long getPos()

Specified by:

getPos in interface CachedObject

Overrides:

getPos in class NodeAVL

getRow

public RowAVL getRow(PersistentStore store)

Overrides:

getRow in class NodeAVL

getData

public java.lang.Object[] getData(PersistentStore store)

getBalance

public int getBalance(PersistentStore store)

Overrides:

getBalance in class NodeAVL

child

public NodeAVL child(PersistentStore store,
                     boolean isleft)

Overrides:

child in class NodeAVL

setBalance

public NodeAVL setBalance(PersistentStore store,
                          int b)

Overrides:

setBalance in class NodeAVL

set

public NodeAVL set(PersistentStore store,
                   boolean isLeft,
                   NodeAVL n)

Overrides:

set in class NodeAVL

replace

public void replace(PersistentStore store,
                    Index index,
                    NodeAVL n)

Overrides:

replace in class NodeAVL

getRealSize

public int getRealSize(RowOutputInterface out)

Specified by:

getRealSize in interface CachedObject

Overrides:

getRealSize in class NodeAVL

setInMemory

public void setInMemory(boolean in)

Specified by:

setInMemory in interface CachedObject

Overrides:

setInMemory in class NodeAVL

write

public void write(RowOutputInterface out)

Specified by:

write in interface CachedObject

Overrides:

write in class NodeAVL

write

public void write(RowOutputInterface out,
                  LongLookup lookup)

Specified by:

write in interface CachedObject

Overrides:

write in class NodeAVL

restore

public void restore()

Specified by:

restore in interface CachedObject

Overrides:

restore in class NodeAVL

destroy

public void destroy()

Specified by:

destroy in interface CachedObject

Overrides:

destroy in class NodeAVL

updateAccessCount

public void updateAccessCount(int count)

Specified by:

updateAccessCount in interface CachedObject

Overrides:

updateAccessCount in class NodeAVL

getAccessCount

public int getAccessCount()

Specified by:

getAccessCount in interface CachedObject

Overrides:

getAccessCount in class NodeAVL

setStorageSize

public void setStorageSize(int size)

Specified by:

setStorageSize in interface CachedObject

Overrides:

setStorageSize in class NodeAVL

getStorageSize

public int getStorageSize()

Specified by:

getStorageSize in interface CachedObject

Overrides:

getStorageSize in class NodeAVL

setPos

public void setPos(long pos)

Specified by:

setPos in interface CachedObject

Overrides:

setPos in class NodeAVL

isNew

public boolean isNew()

Specified by:

isNew in interface CachedObject

Overrides:

isNew in class NodeAVL

hasChanged

public boolean hasChanged()

Specified by:

hasChanged in interface CachedObject

Overrides:

hasChanged in class NodeAVL

isKeepInMemory

public boolean isKeepInMemory()

Specified by:

isKeepInMemory in interface CachedObject

Overrides:

isKeepInMemory in class NodeAVL

keepInMemory

public boolean keepInMemory(boolean keep)

Specified by:

keepInMemory in interface CachedObject

Overrides:

keepInMemory in class NodeAVL