org.hsqldb

Class RowAVLDiskData

java.lang.Object

org.hsqldb.Row

org.hsqldb.RowAVL

org.hsqldb.RowAVLDiskData

All Implemented Interfaces:

CachedObject

public class RowAVLDiskData
extends RowAVL

Implementation of rows for tables with memory resident indexes and disk-based data, such as TEXT tables.

Field Summary

Fields inherited from class org.hsqldb.RowAVL

nPrimaryNode

Fields inherited from class org.hsqldb.Row

rowAction

Fields inherited from interface org.hsqldb.persist.CachedObject

emptyArray

Constructor Summary

Constructors

Constructor and Description
RowAVLDiskData(PersistentStore store, TableBase t, java.lang.Object[] o) Constructor for new rows.
RowAVLDiskData(PersistentStore store, TableBase t, RowInputInterface in) Constructor when read from the disk into the Cache.

Method Summary

Modifier and Type	Method and Description
int	getAccessCount()
java.lang.Object[]	getData() Returns the array of fields in the database row.
int	getRealSize(RowOutputInterface out)
void	getRowData(TableBase t, RowInputInterface in)
int	getStorageSize()
boolean	hasChanged()
NodeAVL	insertNode(int index)
boolean	isInMemory() used by Index, nodes are always in memory
boolean	isKeepInMemory()
boolean	isMemory()
boolean	isNew()
boolean	keepInMemory(boolean keep)
void	setChanged(boolean changed)
void	setData(java.lang.Object[] data)
void	setInMemory(boolean in) required to purge cache
void	setNewNodes(PersistentStore store) Used when data is read from the disk into the Cache the first time.
void	setPos(long pos) Sets the file position for the row and registers the row with the table.
void	setStorageSize(int size)
void	updateAccessCount(int count)
void	write(RowOutputInterface out) Writes the data to disk.

Methods inherited from class org.hsqldb.RowAVL

clearNonPrimaryNodes, delete, destroy, getNode, restore

Methods inherited from class org.hsqldb.Row

equals, getAction, getDefaultCapacity, getId, getPos, getTable, hashCode, isBlock, read, write

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RowAVLDiskData

public RowAVLDiskData(PersistentStore store,
                      TableBase t,
                      java.lang.Object[] o)

Constructor for new rows.

RowAVLDiskData

public RowAVLDiskData(PersistentStore store,
                      TableBase t,
                      RowInputInterface in)
               throws java.io.IOException

Constructor when read from the disk into the Cache. The link with the Nodes is made separetly.

Throws:

java.io.IOException

Method Detail

getRowData

public void getRowData(TableBase t,
                       RowInputInterface in)
                throws java.io.IOException

Throws:

java.io.IOException

setData

public void setData(java.lang.Object[] data)

getData

public java.lang.Object[] getData()

Description copied from class: Row

Returns the array of fields in the database row.

Overrides:

getData in class Row

setNewNodes

public void setNewNodes(PersistentStore store)

Used when data is read from the disk into the Cache the first time. New Nodes are created which are then indexed.

Overrides:

setNewNodes in class RowAVL

insertNode

public NodeAVL insertNode(int index)

Overrides:

insertNode in class RowAVL

getRealSize

public int getRealSize(RowOutputInterface out)

Specified by:

getRealSize in interface CachedObject

Overrides:

getRealSize in class Row

write

public void write(RowOutputInterface out)

Writes the data to disk. Unlike CachedRow, hasChanged is never set to true when changes are made to the Nodes. (Nodes are in-memory). The only time this is used is when a new Row is added to the Caches.

Specified by:

write in interface CachedObject

Overrides:

write in class Row

setChanged

public void setChanged(boolean changed)

Overrides:

setChanged in class Row

isNew

public boolean isNew()

Specified by:

isNew in interface CachedObject

Overrides:

isNew in class Row

hasChanged

public boolean hasChanged()

Specified by:

hasChanged in interface CachedObject

Overrides:

hasChanged in class Row

updateAccessCount

public void updateAccessCount(int count)

Specified by:

updateAccessCount in interface CachedObject

Overrides:

updateAccessCount in class Row

getAccessCount

public int getAccessCount()

Specified by:

getAccessCount in interface CachedObject

Overrides:

getAccessCount in class Row

getStorageSize

public int getStorageSize()

Specified by:

getStorageSize in interface CachedObject

Overrides:

getStorageSize in class Row

setStorageSize

public void setStorageSize(int size)

Specified by:

setStorageSize in interface CachedObject

Overrides:

setStorageSize in class Row

setPos

public void setPos(long pos)

Sets the file position for the row and registers the row with the table.

Specified by:

setPos in interface CachedObject

Overrides:

setPos in class Row

Parameters:

pos - position in data file

isMemory

public boolean isMemory()

Specified by:

isMemory in interface CachedObject

Overrides:

isMemory in class Row

isInMemory

public boolean isInMemory()

used by Index, nodes are always in memory

Specified by:

isInMemory in interface CachedObject

Overrides:

isInMemory in class Row

isKeepInMemory

public boolean isKeepInMemory()

Specified by:

isKeepInMemory in interface CachedObject

Overrides:

isKeepInMemory in class Row

keepInMemory

public boolean keepInMemory(boolean keep)

Specified by:

keepInMemory in interface CachedObject

Overrides:

keepInMemory in class Row

setInMemory

public void setInMemory(boolean in)

required to purge cache

Specified by:

setInMemory in interface CachedObject

Overrides:

setInMemory in class Row