ajanta.security.fileacl
Class FileAcl

java.lang.Object
  |
  +--ajanta.security.fileacl.FileAcl

Direct Known Subclasses:

FileSystemAcl

public class FileAcl

extends java.lang.Object

This class provides Access Control List for determining whether user has read and write permission for a given file.

See Also:

ajanta.security.acl

Field Summary

protected java.util.Hashtable	fileAclTable HashTable to maintain ACL entries
protected java.security.acl.Permission	inherit
protected java.security.Principal	owner Owner of the acl entries
protected ajanta.naming.URN	ownerURN Owner URN of the acl entries
protected java.security.acl.Permission	read
protected java.lang.String	rootPath path to the root directory where .acl file can be obtained
protected java.lang.String	urnPart this is domain part of file URNs
protected java.security.acl.Permission	write

Constructor Summary

FileAcl(java.lang.String root)

Method Summary

void	addFilePermission(ajanta.naming.URN userURN, java.lang.String fileName, java.lang.String perm) Add file permission for a given user
protected boolean	checkFilePermission(ajanta.naming.URN userURN, ajanta.naming.URN fileName, java.lang.String perm) Check permission for a user
boolean	checkPermission(java.lang.String user, java.lang.String file, java.lang.String perm) Check permission for a user
boolean	checkPermission(ajanta.naming.URN userURN, java.lang.String file, java.lang.String perm) Check permission for a user
boolean	checkPermission(ajanta.naming.URN userURN, ajanta.naming.URN file, java.lang.String perm) Check permission for a user
protected void	createAclEntry(java.lang.String line) Create ACL entries : read for "r","write" for "w" and inherit for "i"
void	deleteFilePermission(ajanta.naming.URN userURN, java.lang.String fileName, java.lang.String perm) delete file permission for a given user
protected void	initAclTable() It reads .acl file under "root" directory and initializes the ACL table.

Methods inherited from class java.lang.Object

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

Field Detail

ownerURN

protected ajanta.naming.URN ownerURN

Owner URN of the acl entries

rootPath

protected java.lang.String rootPath

path to the root directory where .acl file can be obtained

owner

protected java.security.Principal owner

Owner of the acl entries

read

protected java.security.acl.Permission read

write

protected java.security.acl.Permission write

inherit

protected java.security.acl.Permission inherit

fileAclTable

protected java.util.Hashtable fileAclTable

HashTable to maintain ACL entries

urnPart

protected java.lang.String urnPart

this is domain part of file URNs

Constructor Detail

FileAcl

public FileAcl(java.lang.String root)

Parameters:

root - path to the root directory where .acl file can be obtained

Method Detail

initAclTable

protected void initAclTable()

It reads .acl file under "root" directory and initializes the ACL table. An entry in .acl file can be
/home/grad25/rsingh/.ajanta/servers/calendarServer/HashTableDB rw URN:ans:fourier.cs.umn.edu/rsingh
name of the file "rwi" user1-URN user2-URN .....
r - read , w - write, i - inherit

createAclEntry

protected void createAclEntry(java.lang.String line)

Create ACL entries : read for "r","write" for "w" and inherit for "i"

deleteFilePermission

public void deleteFilePermission(ajanta.naming.URN userURN,
                                 java.lang.String fileName,
                                 java.lang.String perm)

delete file permission for a given user

Parameters:

userURN - urn of the user who'e permission is being deleted

fileName - name of the file

perm - permission string "read","write" or "inherit"

addFilePermission

public void addFilePermission(ajanta.naming.URN userURN,
                              java.lang.String fileName,
                              java.lang.String perm)

Add file permission for a given user

Parameters:

userURN - urn of the user who'e permission is being added

fileName - name of the file

perm - permission string "read","write" or "inherit"

checkFilePermission

protected boolean checkFilePermission(ajanta.naming.URN userURN,
                                      ajanta.naming.URN fileName,
                                      java.lang.String perm)

Check permission for a user

Parameters:

userURN - urn of the user

fileName - urn of the file ( urn:ans:root/somefile )

checkPermission

public boolean checkPermission(java.lang.String user,
                               java.lang.String file,
                               java.lang.String perm)

Check permission for a user

checkPermission

public boolean checkPermission(ajanta.naming.URN userURN,
                               java.lang.String file,
                               java.lang.String perm)

Check permission for a user

Parameters:

userURN - urn of the user

checkPermission

public boolean checkPermission(ajanta.naming.URN userURN,
                               ajanta.naming.URN file,
                               java.lang.String perm)

Check permission for a user

Parameters:

userURN - urn of the user