org.neodatis.odb.impl.core.transaction

Class DefaultWriteAction

java.lang.Object

org.neodatis.odb.impl.core.transaction.DefaultWriteAction

All Implemented Interfaces:

IWriteAction

public class DefaultWriteAction
extends java.lang.Object
implements IWriteAction

The WriteAction class is the description of a Write operation that will be applied to the main database file when committing. All operations(writes) that can not be written to the database file before committing , pointers (for example) are stored in WriteAction objects. The transaction keeps track of all these WriteActions. When committing, the transaction apply each WriteAction to the engine database file.

Field Summary

Fields

Modifier and Type	Field and Description
static int	count
static int	DATA_WRITE_ACTION
static int	DIRECT_WRITE_ACTION
static java.lang.String	LOG_ID
static int	POINTER_WRITE_ACTION
static int	UNKNOWN_WRITE_ACTION

Constructor Summary

Constructors

Constructor and Description
DefaultWriteAction(long position)
DefaultWriteAction(long position, byte[] bytes)
DefaultWriteAction(long position, byte[] bytes, java.lang.String label)

Method Summary

Modifier and Type	Method and Description
void	addBytes(byte[] bytes)
void	applyTo(IFileSystemInterface fsi, int index)
void	clear()
byte[]	getBytes(int index)
long	getPosition()
boolean	isEmpty()
void	persist(IFileSystemInterface fsi, int index)
static DefaultWriteAction	read(IFileSystemInterface fsi, int index)
void	setPosition(long position)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

count

public static int count

UNKNOWN_WRITE_ACTION

public static final int UNKNOWN_WRITE_ACTION

See Also:

Constant Field Values

DATA_WRITE_ACTION

public static final int DATA_WRITE_ACTION

See Also:

Constant Field Values

POINTER_WRITE_ACTION

public static final int POINTER_WRITE_ACTION

See Also:

Constant Field Values

DIRECT_WRITE_ACTION

public static final int DIRECT_WRITE_ACTION

See Also:

Constant Field Values

LOG_ID

public static final java.lang.String LOG_ID

See Also:

Constant Field Values

Constructor Detail

DefaultWriteAction

public DefaultWriteAction(long position)

DefaultWriteAction

public DefaultWriteAction(long position,
                          byte[] bytes)

DefaultWriteAction

public DefaultWriteAction(long position,
                          byte[] bytes,
                          java.lang.String label)

Method Detail

getPosition

public long getPosition()

Specified by:

getPosition in interface IWriteAction

setPosition

public void setPosition(long position)

getBytes

public byte[] getBytes(int index)

Specified by:

getBytes in interface IWriteAction

addBytes

public void addBytes(byte[] bytes)

Specified by:

addBytes in interface IWriteAction

persist

public void persist(IFileSystemInterface fsi,
                    int index)

Specified by:

persist in interface IWriteAction

read

public static DefaultWriteAction read(IFileSystemInterface fsi,
                                      int index)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

applyTo

public void applyTo(IFileSystemInterface fsi,
                    int index)

Specified by:

applyTo in interface IWriteAction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface IWriteAction

clear

public void clear()