Package com.db4o.internal

Class DefragmentContextImpl

java.lang.Object

com.db4o.internal.DefragmentContextImpl

All Implemented Interfaces:

DefragmentContext, AspectVersionContext, HandlerVersionContext, MarshallingInfo, ReadWriteBuffer, BufferContext, Context, ReadBuffer, WriteBuffer

public final class DefragmentContextImpl
extends java.lang.Object
implements ReadWriteBuffer, DefragmentContext

Constructor Summary

Constructors

Constructor	Description
DefragmentContextImpl(ByteArrayBuffer source, DefragmentServices services)
DefragmentContextImpl(ByteArrayBuffer source, DefragmentServices services, ObjectHeader header)
DefragmentContextImpl(ByteArrayBuffer source, DefragmentContextImpl context)
DefragmentContextImpl(DefragmentContextImpl parentContext, ObjectHeader header)

Method Summary

Modifier and Type	Method	Description
Slot	allocateMappedTargetSlot(int sourceAddress, int length)	only used by old handlers: OpenTypeHandler0, StringHandler0, ArrayHandler0.
Slot	allocateTargetSlot(int length)	only used by old handlers: OpenTypeHandler0, StringHandler0, ArrayHandler0.
void	beginSlot()
ReadBuffer	buffer()
ClassMetadata	classMetadata()
int	consumeCurrentParentSourceID()
ObjectContainerBase	container()
void	copyAddress()
int	copyID()
int	copyID(boolean flipNegative)
int	copyIDReturnOriginalID()
int	copyIDReturnOriginalID(boolean flipNegative)
int	copySlotlessID()
int	copySlotToNewMapped(int sourceAddress, int length)
int	copyUnindexedID()
void	currentParentSourceID(int id)
int	declaredAspectCount()
void	declaredAspectCount(int count)
void	defragment(TypeHandler4 handler)
int	handlerVersion()
void	incrementIntSize()
void	incrementOffset(int numBytes)
void	incrementStringOffset(LatinStringIO sio)
boolean	isLegacyHandlerVersion()
boolean	isNull(int fieldIndex)
int	length()
int	mappedID(int origID)
IDMapping	mapping()
ObjectContainer	objectContainer()
int	offset()	returns the current offset in the buffer
static void	processCopy(DefragmentServices context, int sourceID, SlotCopyHandler command)
static void	processCopy(DefragmentServices services, int sourceID, SlotCopyHandler command, ByteArrayBuffer sourceReader)
void	readBegin(byte identifier)
BitMap4	readBitMap(int bitCount)
byte	readByte()	reads a byte from the buffer.
void	readBytes(byte[] bytes)	reads an array of bytes from the buffer.
void	readEnd()
int	readInt()	reads an int from the buffer.
long	readLong()	reads a long from the buffer.
void	seek(int offset)	positions the read pointer at the specified position
DefragmentServices	services()
SlotFormat	slotFormat()
ByteArrayBuffer	sourceBuffer()
ByteArrayBuffer	sourceBufferByAddress(int sourceAddress, int length)
ByteArrayBuffer	sourceBufferById(int sourceId)
Transaction	systemTrans()
ByteArrayBuffer	targetBuffer()
void	targetWriteBytes(int address, ByteArrayBuffer buffer)
Transaction	transaction()
TypeHandler4	typeHandlerForId(int id)
void	write(LocalObjectContainer file, int address)
void	writeByte(byte value)	writes a single byte to the buffer.
void	writeBytes(byte[] bytes)	writes an array of bytes to the buffer
void	writeInt(int value)	writes an int to the buffer.
void	writeLong(long value)	writes a long to the buffer
int	writeMappedID(int originalID)
void	writeToTarget(int address)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefragmentContextImpl

public DefragmentContextImpl(ByteArrayBuffer source,
                             DefragmentContextImpl context)

DefragmentContextImpl

public DefragmentContextImpl(ByteArrayBuffer source,
                             DefragmentServices services)

DefragmentContextImpl

public DefragmentContextImpl(ByteArrayBuffer source,
                             DefragmentServices services,
                             ObjectHeader header)

DefragmentContextImpl

public DefragmentContextImpl(DefragmentContextImpl parentContext,
                             ObjectHeader header)

Method Detail

offset

public int offset()

Description copied from interface: ReadBuffer

returns the current offset in the buffer

Specified by:

offset in interface ReadBuffer

Returns:

the offset

seek

public void seek(int offset)

Description copied from interface: ReadBuffer

positions the read pointer at the specified position

Specified by:

seek in interface ReadBuffer

Parameters:

offset - the desired position in the buffer

incrementOffset

public void incrementOffset(int numBytes)

Specified by:

incrementOffset in interface DefragmentContext

Specified by:

incrementOffset in interface ReadWriteBuffer

incrementIntSize

public void incrementIntSize()

Specified by:

incrementIntSize in interface ReadWriteBuffer

copySlotlessID

public int copySlotlessID()

Specified by:

copySlotlessID in interface DefragmentContext

copyUnindexedID

public int copyUnindexedID()

Specified by:

copyUnindexedID in interface DefragmentContext

copyID

public int copyID()

Specified by:

copyID in interface DefragmentContext

copyID

public int copyID(boolean flipNegative)

copyIDReturnOriginalID

public int copyIDReturnOriginalID()

Specified by:

copyIDReturnOriginalID in interface DefragmentContext

copyIDReturnOriginalID

public int copyIDReturnOriginalID(boolean flipNegative)

readBegin

public void readBegin(byte identifier)

Specified by:

readBegin in interface ReadWriteBuffer

readByte

public byte readByte()

Description copied from interface: ReadBuffer

reads a byte from the buffer.

Specified by:

readByte in interface ReadBuffer

Returns:

the byte

readBytes

public void readBytes(byte[] bytes)

Description copied from interface: ReadBuffer

reads an array of bytes from the buffer. The length of the array that is passed as a parameter specifies the number of bytes that are to be read. The passed bytes buffer parameter is directly filled.

Specified by:

readBytes in interface ReadBuffer

Parameters:

bytes - the byte array to read the bytes into.

readInt

public int readInt()

Description copied from interface: ReadBuffer

reads an int from the buffer.

Specified by:

readInt in interface ReadBuffer

Returns:

the int

writeInt

public void writeInt(int value)

Description copied from interface: WriteBuffer

writes an int to the buffer.

Specified by:

writeInt in interface WriteBuffer

Parameters:

value - the int

write

public void write(LocalObjectContainer file,
                  int address)

incrementStringOffset

public void incrementStringOffset(LatinStringIO sio)

sourceBuffer

public ByteArrayBuffer sourceBuffer()

Specified by:

sourceBuffer in interface DefragmentContext

targetBuffer

public ByteArrayBuffer targetBuffer()

Specified by:

targetBuffer in interface DefragmentContext

mapping

public IDMapping mapping()

systemTrans

public Transaction systemTrans()

services

public DefragmentServices services()

Specified by:

services in interface DefragmentContext

processCopy

public static void processCopy(DefragmentServices context,
                               int sourceID,
                               SlotCopyHandler command)

processCopy

public static void processCopy(DefragmentServices services,
                               int sourceID,
                               SlotCopyHandler command,
                               ByteArrayBuffer sourceReader)

writeByte

public void writeByte(byte value)

Description copied from interface: WriteBuffer

writes a single byte to the buffer.

Specified by:

writeByte in interface WriteBuffer

Parameters:

value - the byte

readLong

public long readLong()

Description copied from interface: ReadBuffer

reads a long from the buffer.

Specified by:

readLong in interface ReadBuffer

Returns:

the long

writeLong

public void writeLong(long value)

Description copied from interface: WriteBuffer

writes a long to the buffer

Specified by:

writeLong in interface WriteBuffer

Parameters:

value - the long

readBitMap

public BitMap4 readBitMap(int bitCount)

Specified by:

readBitMap in interface ReadBuffer

readEnd

public void readEnd()

Specified by:

readEnd in interface ReadWriteBuffer

writeMappedID

public int writeMappedID(int originalID)

length

public int length()

Specified by:

length in interface ReadWriteBuffer

transaction

public Transaction transaction()

Specified by:

transaction in interface Context

container

public ObjectContainerBase container()

Specified by:

container in interface DefragmentContext

typeHandlerForId

public TypeHandler4 typeHandlerForId(int id)

Specified by:

typeHandlerForId in interface DefragmentContext

handlerVersion

public int handlerVersion()

Specified by:

handlerVersion in interface DefragmentContext

Specified by:

handlerVersion in interface HandlerVersionContext

isLegacyHandlerVersion

public boolean isLegacyHandlerVersion()

Specified by:

isLegacyHandlerVersion in interface DefragmentContext

mappedID

public int mappedID(int origID)

Specified by:

mappedID in interface DefragmentContext

objectContainer

public ObjectContainer objectContainer()

Specified by:

objectContainer in interface Context

allocateTargetSlot

public Slot allocateTargetSlot(int length)

only used by old handlers: OpenTypeHandler0, StringHandler0, ArrayHandler0. Doesn't need to work with modern IdSystems.

Specified by:

allocateTargetSlot in interface DefragmentContext

allocateMappedTargetSlot

public Slot allocateMappedTargetSlot(int sourceAddress,
                                     int length)

only used by old handlers: OpenTypeHandler0, StringHandler0, ArrayHandler0. Doesn't need to work with modern IdSystems.

Specified by:

allocateMappedTargetSlot in interface DefragmentContext

copySlotToNewMapped

public int copySlotToNewMapped(int sourceAddress,
                               int length)
                        throws java.io.IOException

Specified by:

copySlotToNewMapped in interface DefragmentContext

Throws:

java.io.IOException

targetWriteBytes

public void targetWriteBytes(int address,
                             ByteArrayBuffer buffer)

Specified by:

targetWriteBytes in interface DefragmentContext

sourceBufferByAddress

public ByteArrayBuffer sourceBufferByAddress(int sourceAddress,
                                             int length)
                                      throws java.io.IOException

Specified by:

sourceBufferByAddress in interface DefragmentContext

Throws:

java.io.IOException

sourceBufferById

public ByteArrayBuffer sourceBufferById(int sourceId)
                                 throws java.io.IOException

Specified by:

sourceBufferById in interface DefragmentContext

Throws:

java.io.IOException

writeToTarget

public void writeToTarget(int address)

writeBytes

public void writeBytes(byte[] bytes)

Description copied from interface: WriteBuffer

writes an array of bytes to the buffer

Specified by:

writeBytes in interface WriteBuffer

Parameters:

bytes - the byte array

buffer

public ReadBuffer buffer()

Specified by:

buffer in interface BufferContext

Specified by:

buffer in interface MarshallingInfo

defragment

public void defragment(TypeHandler4 handler)

Specified by:

defragment in interface DefragmentContext

beginSlot

public void beginSlot()

Specified by:

beginSlot in interface MarshallingInfo

classMetadata

public ClassMetadata classMetadata()

Specified by:

classMetadata in interface MarshallingInfo

isNull

public boolean isNull(int fieldIndex)

Specified by:

isNull in interface MarshallingInfo

declaredAspectCount

public int declaredAspectCount()

Specified by:

declaredAspectCount in interface AspectVersionContext

declaredAspectCount

public void declaredAspectCount(int count)

Specified by:

declaredAspectCount in interface AspectVersionContext

slotFormat

public SlotFormat slotFormat()

Specified by:

slotFormat in interface HandlerVersionContext

currentParentSourceID

public void currentParentSourceID(int id)

consumeCurrentParentSourceID

public int consumeCurrentParentSourceID()

copyAddress

public void copyAddress()