Java Doc for AclEntry.java in  » 6.0-JDK-Modules » j2me » java » security » acl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.security.acl 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.security.acl.AclEntry

AclEntry
public interface AclEntry extends Cloneable(Code)
This is the interface used for representing one entry in an Access Control List (ACL).

An ACL can be thought of as a data structure with multiple ACL entry objects. Each ACL entry object contains a set of permissions associated with a particular principal. (A principal represents an entity such as an individual user or a group). Additionally, each ACL entry is specified as being either positive or negative. If positive, the permissions are to be granted to the associated principal. If negative, the permissions are to be denied. Each principal can have at most one positive ACL entry and one negative entry; that is, multiple positive or negative ACL entries are not allowed for any principal. Note: ACL entries are by default positive. An entry becomes a negative entry only if the AclEntry.setNegativePermissions() setNegativePermissions method is called on it.
See Also:   java.security.acl.Acl
author:
   Satish Dharmaraj





Method Summary
public  booleanaddPermission(Permission permission)
     Adds the specified permission to this ACL entry.
public  booleancheckPermission(Permission permission)
     Checks if the specified permission is part of the permission set in this entry.
Parameters:
  permission - the permission to be checked for.
public  Objectclone()
     Clones this ACL entry.
public  PrincipalgetPrincipal()
     Returns the principal for which permissions are granted or denied by this ACL entry.
public  booleanisNegative()
     Returns true if this is a negative ACL entry (one denying the associated principal the set of permissions in the entry), false otherwise.
public  Enumerationpermissions()
     Returns an enumeration of the permissions in this ACL entry.
public  booleanremovePermission(Permission permission)
     Removes the specified permission from this ACL entry.
Parameters:
  permission - the permission to be removed from this entry.
public  voidsetNegativePermissions()
     Sets this ACL entry to be a negative one.
public  booleansetPrincipal(Principal user)
     Specifies the principal for which permissions are granted or denied by this ACL entry.
public  StringtoString()
     Returns a string representation of the contents of this ACL entry.



Method Detail
addPermission
public boolean addPermission(Permission permission)(Code)
Adds the specified permission to this ACL entry. Note: An entry can have multiple permissions.
Parameters:
  permission - the permission to be associated withthe principal in this entry. true if the permission was added, false if thepermission was already part of this entry's permission set.



checkPermission
public boolean checkPermission(Permission permission)(Code)
Checks if the specified permission is part of the permission set in this entry.
Parameters:
  permission - the permission to be checked for. true if the permission is part of thepermission set in this entry, false otherwise.



clone
public Object clone()(Code)
Clones this ACL entry. a clone of this ACL entry.



getPrincipal
public Principal getPrincipal()(Code)
Returns the principal for which permissions are granted or denied by this ACL entry. Returns null if there is no principal set for this entry yet. the principal associated with this entry.
See Also:   AclEntry.setPrincipal



isNegative
public boolean isNegative()(Code)
Returns true if this is a negative ACL entry (one denying the associated principal the set of permissions in the entry), false otherwise. true if this is a negative ACL entry, false if it's not.



permissions
public Enumeration permissions()(Code)
Returns an enumeration of the permissions in this ACL entry. an enumeration of the permissions in this ACL entry.



removePermission
public boolean removePermission(Permission permission)(Code)
Removes the specified permission from this ACL entry.
Parameters:
  permission - the permission to be removed from this entry. true if the permission is removed, false if thepermission was not part of this entry's permission set.



setNegativePermissions
public void setNegativePermissions()(Code)
Sets this ACL entry to be a negative one. That is, the associated principal (e.g., a user or a group) will be denied the permission set specified in the entry. Note: ACL entries are by default positive. An entry becomes a negative entry only if this setNegativePermissions method is called on it.



setPrincipal
public boolean setPrincipal(Principal user)(Code)
Specifies the principal for which permissions are granted or denied by this ACL entry. If a principal was already set for this ACL entry, false is returned, otherwise true is returned.
Parameters:
  user - the principal to be set for this entry. true if the principal is set, false if there wasalready a principal set for this entry.
See Also:   AclEntry.getPrincipal



toString
public String toString()(Code)
Returns a string representation of the contents of this ACL entry. a string representation of the contents.



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