rossi.fstools.fs.fatfs
Class FatFileSystem

java.lang.Object
  rossi.fstools.fs.fatfs.FatFileSystem

All Implemented Interfaces:

FileSystem

public class FatFileSystem

extends java.lang.Object

implements FileSystem

Implementation of the FAT 12/16/32 file systems.

Constructor Summary

FatFileSystem()

Method Summary

void	close() Close the underlying BlockReader used by this file system.
Directory	createFatDirectory(FatDirEntry inode) Create a directory.
File	createFatFile(FatDirEntry inode) Creates a file from an inode
Inode	getInode(InodePtr ptr) Gets an inode.
FsObject	getObject(Inode inode) Get the filesystem object represented by an inode.
InodePtr	getRootDir() Get a pointer to the root directory's inode.
SuperBlock	open(BlockReader br) Open a file system for reading.

Methods inherited from class java.lang.Object

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

Constructor Detail

FatFileSystem

public FatFileSystem()

Method Detail

open

public SuperBlock open(BlockReader br)
                throws FsException,
                       java.io.IOException

Description copied from interface: FileSystem

Open a file system for reading. The BlockReader should be initialized to point to the phyical storage of the desired filesystem.

Specified by:

open in interface FileSystem

Parameters:

br - a BlockReader for accessing the physical filesystem.

Returns:

the filesystem's SuperBlock

Throws:

java.io.IOException

FsException - if the superblock cannot be parsed.

close

public void close()
           throws java.io.IOException

Description copied from interface: FileSystem

Close the underlying BlockReader used by this file system.

Specified by:

close in interface FileSystem

Throws:

java.io.IOException

getRootDir

public InodePtr getRootDir()

Description copied from interface: FileSystem

Get a pointer to the root directory's inode.

Specified by:

getRootDir in interface FileSystem

Returns:

InodePtr pointing to the root directory.

getInode

public Inode getInode(InodePtr ptr)
               throws FsException,
                      java.io.IOException

Gets an inode. In this case the ptr is the inode.

Specified by:

getInode in interface FileSystem

Parameters:

ptr - an InodePtr

Returns:

Inode pointed to by ptr

Throws:

FsException - if the Inode cannot be parsed.

java.io.IOException - if an IO error occurs

createFatFile

public File createFatFile(FatDirEntry inode)
                   throws FsException,
                          java.io.IOException

Creates a file from an inode

Parameters:

inode - the inode

Returns:

the file

Throws:

java.io.IOException - in case of an IO error

FSException - in case of a FS format error

FsException

createFatDirectory

public Directory createFatDirectory(FatDirEntry inode)
                             throws FsException,
                                    java.io.IOException

Create a directory.

Parameters:

inode - a Ext2Inode

Returns:

Directory

Throws:

FsException

java.io.IOException

getObject

public FsObject getObject(Inode inode)
                   throws FsException,
                          java.io.IOException

Description copied from interface: FileSystem

Get the filesystem object represented by an inode.

Specified by:

getObject in interface FileSystem

Parameters:

inode - an Inode

Returns:

FsObject that is represented by the inode

Throws:

FsException - if the object cannot be parsed.

java.io.IOException - if an IO error occurs.