org.hsqldb

Class RowDiskDataChange

java.lang.Object

org.hsqldb.Row

org.hsqldb.RowAVL

org.hsqldb.RowAVLDisk

org.hsqldb.RowDiskDataChange

All Implemented Interfaces:

CachedObject

public class RowDiskDataChange
extends RowAVLDisk

Since:

2.2.7

Field Summary

Fields

Modifier and Type	Field and Description
static int	COL_POS_IS_UPDATE
static int	COL_POS_ROW_ID
static int	COL_POS_ROW_NUM
static int	COL_POS_SCHEMA_NAME
static int	COL_POS_TABLE_ID
static int	COL_POS_TABLE_NAME

Fields inherited from class org.hsqldb.RowAVLDisk

NO_POS

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
RowDiskDataChange(Session session, TableBase t, RowInputInterface in) Constructor when read from the disk into the Cache.
RowDiskDataChange(TableBase t, java.lang.Object[] data, PersistentStore store, Table targetTable) Constructor for new Rows.

Method Summary

Modifier and Type	Method and Description
int	getRealSize(RowOutputInterface out)
int[]	getUpdateColumnMap()
java.lang.Object[]	getUpdateData()
void	setTargetTable(Table table)
void	setUpdateColumnMap(int[] colMap)
void	setUpdateData(java.lang.Object[] data)
void	write(RowOutputInterface out) Used exclusively by Cache to save the row to disk.

Methods inherited from class org.hsqldb.RowAVLDisk

delete, destroy, getAccessCount, getStorageSize, getTable, hasChanged, insertNode, isInMemory, isKeepInMemory, isMemory, isNew, keepInMemory, setChanged, setInMemory, setNewNodes, setNodesChanged, setPos, setStorageSize, updateAccessCount, write

Methods inherited from class org.hsqldb.RowAVL

clearNonPrimaryNodes, getNode, restore

Methods inherited from class org.hsqldb.Row

equals, getAction, getData, getDefaultCapacity, getId, getPos, hashCode, isBlock, read

Methods inherited from class java.lang.Object

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

Field Detail

COL_POS_ROW_NUM

public static final int COL_POS_ROW_NUM

See Also:

Constant Field Values

COL_POS_ROW_ID

public static final int COL_POS_ROW_ID

See Also:

Constant Field Values

COL_POS_TABLE_ID

public static final int COL_POS_TABLE_ID

See Also:

Constant Field Values

COL_POS_SCHEMA_NAME

public static final int COL_POS_SCHEMA_NAME

See Also:

Constant Field Values

COL_POS_TABLE_NAME

public static final int COL_POS_TABLE_NAME

See Also:

Constant Field Values

COL_POS_IS_UPDATE

public static final int COL_POS_IS_UPDATE

See Also:

Constant Field Values

Constructor Detail

RowDiskDataChange

public RowDiskDataChange(TableBase t,
                         java.lang.Object[] data,
                         PersistentStore store,
                         Table targetTable)

Constructor for new Rows. Variable hasDataChanged is set to true in order to indicate the data needs saving.

Parameters:

t - table

o - row data

RowDiskDataChange

public RowDiskDataChange(Session session,
                         TableBase t,
                         RowInputInterface in)
                  throws java.io.IOException

Constructor when read from the disk into the Cache.

Parameters:

t - table

in - data source

Throws:

java.io.IOException

Method Detail

write

public void write(RowOutputInterface out)

Description copied from class: RowAVLDisk

Used exclusively by Cache to save the row to disk. New implementation in 1.7.2 writes out only the Node data if the table row data has not changed. This situation accounts for the majority of invocations as for each row deleted or inserted, the Nodes for several other rows will change.

Specified by:

write in interface CachedObject

Overrides:

write in class RowAVLDisk

getUpdateData

public java.lang.Object[] getUpdateData()

getUpdateColumnMap

public int[] getUpdateColumnMap()

setTargetTable

public void setTargetTable(Table table)

setUpdateData

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

setUpdateColumnMap

public void setUpdateColumnMap(int[] colMap)

getRealSize

public int getRealSize(RowOutputInterface out)

Specified by:

getRealSize in interface CachedObject

Overrides:

getRealSize in class RowAVLDisk