ajanta.security.fileacl
Class FileSystemAcl

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

public class FileSystemAcl

extends FileAcl

This Access Control list is used by the ajanta FileSystem The rules for granting or denying access are as follows:
1. If an access control list (ACL) is associated with the file exists, then this system checks if this list contains an entry giving permission to the agent's owner for the requested operation. If so, the operation is allowed.
2. If there is no access control list (ACL) associated with a file/directory, then the system looks for the ACL of its parent directory. This rule is applied recursively, until a directory with an ACL or the root directory is reached. If no ACL is associated with the root directory, access is denied.
3. If a directory is reached with an ACL associated, this ACL is searched for the access rights given to the agent's owner. Each entry also contains an ``inheritance" right, which means that the rights given to a principal for this directory are also applicable to the files and directories contained within it if no ACL is associated with them.

Field Summary

Fields inherited from class ajanta.security.fileacl.FileAcl

fileAclTable, inherit, owner, ownerURN, read, rootPath, urnPart, write

Constructor Summary

FileSystemAcl(java.lang.String root)

Method Summary

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"

Methods inherited from class ajanta.security.fileacl.FileAcl

addFilePermission, checkFilePermission, checkPermission, checkPermission, deleteFilePermission, initAclTable

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSystemAcl

public FileSystemAcl(java.lang.String root)

Method Detail

createAclEntry

protected void createAclEntry(java.lang.String line)

Description copied from class: FileAcl

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

Overrides:

createAclEntry in class FileAcl

checkPermission

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

Description copied from class: FileAcl

Check permission for a user

Overrides:

checkPermission in class FileAcl

Parameters:

userURN - urn of the user