rossi.fstools.fs.reiserfs
Class ItemHead

java.lang.Object
  rossi.fstools.fs.reiserfs.ItemHead

All Implemented Interfaces:

DiskStructure

public class ItemHead

extends java.lang.Object

implements DiskStructure

Representation of a ItemHead.

Item Head is an intrablock pointer to an item.

        31        24        16       8       0
        --------------------------------------
  0000  |        Key                         |
        --------------------------------------
  0004  |        Key                         |
        --------------------------------------
  0008  |        Key                         |
        --------------------------------------
  000C  |        Key                         |
        --------------------------------------
  0010  | Free/EntCount    |  Item Length    |
        --------------------------------------
  0014  |  Item Location   |  Item Version   |
        --------------------------------------
 

Field Summary

protected int	freeEntCt
protected int	itemLen
protected int	itemLocation
protected int	itemVersion
protected Key	key

Constructor Summary

ItemHead()

Method Summary

int	getDataSize() Get the size in bytes of the structure.
int	getFreeEntCt() Get the number of entries if this is a DirectoryItem, or the free space if this is a indirect item.
int	getItemLen() Get the length of this Item in bytes.
int	getItemLocation() Location of the item within this block.
int	getItemVersion() Indicates the item version.
Key	getKey() Get the Key of the item.
void	loadFromBuffer(byte[] buffer, int blkoffset) Loads the object from a memory buffer
void	setFreeEntCt(int aFreeEntCt)
void	setItemLen(int aItemLen)
void	setItemLocation(int aItemLocation)
void	setItemVersion(int aItemVersion)
void	setKey(Key aKey)

Methods inherited from class java.lang.Object

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

Field Detail

key

protected Key key

freeEntCt

protected int freeEntCt

itemLen

protected int itemLen

itemLocation

protected int itemLocation

itemVersion

protected int itemVersion

Constructor Detail

ItemHead

public ItemHead()

Method Detail

getDataSize

public int getDataSize()

Description copied from interface: DiskStructure

Get the size in bytes of the structure. For variable length sturctures this may represent the minimum length rather than the actual length.

Specified by:

getDataSize in interface DiskStructure

Returns:

the size of the structure.

getKey

public Key getKey()

Get the Key of the item. The key is used to associate directory entries to items.

Returns:

the key

setKey

public void setKey(Key aKey)

getFreeEntCt

public int getFreeEntCt()

Get the number of entries if this is a DirectoryItem, or the free space if this is a indirect item.

Returns:

free space or entry count

setFreeEntCt

public void setFreeEntCt(int aFreeEntCt)

getItemLen

public int getItemLen()

Get the length of this Item in bytes.

Returns:

item length.

setItemLen

public void setItemLen(int aItemLen)

getItemLocation

public int getItemLocation()

Location of the item within this block.

Returns:

item location.

setItemLocation

public void setItemLocation(int aItemLocation)

getItemVersion

public int getItemVersion()

Indicates the item version.

0 for old items, 2 for new items.

Returns:

item version.

setItemVersion

public void setItemVersion(int aItemVersion)

loadFromBuffer

public void loadFromBuffer(byte[] buffer,
                           int blkoffset)
                    throws FsException

Description copied from interface: DiskStructure

Loads the object from a memory buffer

Specified by:

loadFromBuffer in interface DiskStructure

Parameters:

buffer - a byte[] containing data to be read in populating the object

blkoffset - a int indicating the offset within the buffer to start parsing.

Throws:

FsException - if a parse error occurs.