eu.unicore.uftp.server

Class UserFileAccess

java.lang.Object

eu.unicore.uftp.server.UserFileAccess

public class UserFileAccess
extends Object

wraps file access (read/write operations) and other operations which need to be performed as a fixed user/group

Author:

schuller

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BUFFERSIZE default file read/write buffersize in bytes

Constructor Summary

Constructors

Constructor and Description
UserFileAccess(FileAccess fa, String userID, String groupID)

Method Summary

Modifier and Type	Method and Description
void	asUser(Runnable runnable) run the given task as the current user
String	getHome() gets the user's home directory
RandomAccessFile	getRandomAccessFile(File file, String mode) create a RandomAccessFile for accessing the given path
FileInfo[]	listFiles(File directory) lists files in the given directory
void	mkdir(String canonicalPath) create a directory.
InputStream	readFile(String canonicalPath, int bufferSize) create a InputStream for reading
void	rm(String canonicalPath) delete a file or directory
void	setUser(String canonicalPath) set user/group on the given file
FileInfo	stat(String path) get info on a single file
OutputStream	writeFile(String canonicalPath, boolean append, int bufferSize) create a OutputStream for writing

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFERSIZE

public static final int DEFAULT_BUFFERSIZE

default file read/write buffersize in bytes

See Also:

Constant Field Values

Constructor Detail

UserFileAccess

public UserFileAccess(FileAccess fa,
                      String userID,
                      String groupID)

Method Detail

readFile

public InputStream readFile(String canonicalPath,
                            int bufferSize)
                     throws Exception

create a InputStream for reading

Parameters:

canonicalPath - - the canonical path to the file

bufferSize - - the buffer size for reading from

Returns:

a InputStream

Throws:

Exception

getRandomAccessFile

public RandomAccessFile getRandomAccessFile(File file,
                                            String mode)
                                     throws IOException

create a RandomAccessFile for accessing the given path

Parameters:

file - - the path

mode - - the mode (see RandomAccessFile.RandomAccessFile(java.io.File, String)

Returns:

RandomAccessFile

Throws:

IOException

Exception

listFiles

public FileInfo[] listFiles(File directory)

lists files in the given directory

Parameters:

parent - - the parent file

Returns:

list of FileInfo objects

stat

public FileInfo stat(String path)

get info on a single file

Parameters:

path - - the file

writeFile

public OutputStream writeFile(String canonicalPath,
                              boolean append,
                              int bufferSize)
                       throws Exception

create a OutputStream for writing

Parameters:

canonicalPath - - the canonical path to the file

bufferSize - - the buffer size for writing to disk

Returns:

OutputStream

Throws:

Exception

setUser

public void setUser(String canonicalPath)
             throws Exception

set user/group on the given file

Parameters:

canonicalPath -

Throws:

Exception

mkdir

public void mkdir(String canonicalPath)
           throws Exception

create a directory. all parent directories must exist

Parameters:

canonicalPath - - the directory to create

Throws:

Exception

rm

public void rm(String canonicalPath)
        throws Exception

delete a file or directory

Parameters:

canonicalPath - - the file/directory to delete

Throws:

Exception

getHome

public String getHome()

gets the user's home directory

Returns:

user's home directory

Throws:

Exception

asUser

public void asUser(Runnable runnable)
            throws Exception

run the given task as the current user

Parameters:

runnable -

Throws:

Exception