rossi.fstools.fs.reiserfs
Class DiskChild

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

All Implemented Interfaces:

DiskStructure

public class DiskChild

extends java.lang.Object

implements DiskStructure

Representation of a DiskChild. DiskChild is an block-to-block pointer stored within InternalNode of the B+Tree in ReiserFS.

        31        24        16       8       0
        --------------------------------------
  0000  |        Block Number                |
        --------------------------------------
  0004  |        Size       | Reserved       |
        --------------------------------------












Field Summary




protected  long
blockNumber



           



protected  int
childSize



           



protected  int
reserved



           


 



Constructor Summary
DiskChild()



           
 



Method Summary




 long
getBlockNumber()



          Get the block number of the child block that we are pointing to.



 int
getChildSize()



          Get the number of bytes used within the child block.



 int
getDataSize()



          Get the size of this structure.



 int
getReserved()



           



 void
loadFromBuffer(byte[] buffer,
               int blkoffset)



          Load this structure from disk.



 void
setBlockNumber(long aBlockNumber)



           



 void
setChildSize(int aChildSize)



           



 void
setReserved(int aReserved)



           


 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 





Field Detail



blockNumber
protected long blockNumber







childSize
protected int childSize







reserved
protected int reserved








Constructor Detail



DiskChild
public DiskChild()






Method Detail



getDataSize
public int getDataSize()

Get the size of this structure.


Specified by:
getDataSize in interface DiskStructure



Returns:
size
See Also:
DiskStructure.getDataSize()





getBlockNumber
public long getBlockNumber()

Get the block number of the child block that we are pointing to.






Returns:
block number





setBlockNumber
public void setBlockNumber(long aBlockNumber)











getChildSize
public int getChildSize()

Get the number of bytes used within the child block.






Returns:
child size.





setChildSize
public void setChildSize(int aChildSize)











getReserved
public int getReserved()











setReserved
public void setReserved(int aReserved)











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

Load this structure from disk.


Specified by:
loadFromBuffer in interface DiskStructure


Parameters:
blkoffset - offset within buffer where data begins.
buffer - a byte[] containing data to be read in populating the object
Throws:
FsException - if a parse error occurs
See Also:
DiskStructure.loadFromBuffer(byte[], int)