java.io
Class FilePermissionCollection

java.lang.Object
  |
  +--java.security.PermissionCollection
        |
        +--java.io.FilePermissionCollection

final class FilePermissionCollection

extends java.security.PermissionCollection

implements Serializable

A FilePermissionCollection stores a set of FilePermission permissions. FilePermission objects must be stored in a manner that allows them to be inserted in any order, but enable the implies function to evaluate the implies method. For example, if you have two FilePermissions:

1. "/tmp/-", "read"
2. "/tmp/scratch/foo", "write"

And you are calling the implies function with the FilePermission: "/tmp/scratch/foo", "read,write", then the implies function must take into account both the /tmp/- and /tmp/scratch/foo permissions, so the effective permission is "read,write".

See Also:

Permission, java.security.Permissions, PermissionCollection, Serialized Form

Field Summary

private Vector

permissions

Fields inherited from class java.security.PermissionCollection

readOnly

Constructor Summary

FilePermissionCollection()
Create an empty FilePermissions object.

Method Summary

void	add(java.security.Permission permission) Adds a permission to the FilePermissions.
Enumeration	elements() Returns an enumeration of all the FilePermission objects in the container.
boolean	implies(java.security.Permission permission) Check and see if this set of permissions implies the permissions expressed in "permission".

Methods inherited from class java.security.PermissionCollection

isReadOnly, setReadOnly, toString

Methods inherited from class java.lang.Object

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

Field Detail

permissions

private Vector permissions

Constructor Detail

FilePermissionCollection

public FilePermissionCollection()

Create an empty FilePermissions object.

Method Detail

add

public void add(java.security.Permission permission)

Adds a permission to the FilePermissions. The key for the hash is permission.path.

Parameters:

permission - the Permission object to add.

Overrides:

add in class java.security.PermissionCollection

implies

public boolean implies(java.security.Permission permission)

Check and see if this set of permissions implies the permissions expressed in "permission".

Parameters:

p - the Permission object to compare

Returns:

true if "permission" is a proper subset of a permission in the set, false if not.

Overrides:

implies in class java.security.PermissionCollection

elements

public Enumeration elements()

Returns an enumeration of all the FilePermission objects in the container.

Returns:

an enumeration of all the FilePermission objects.

Overrides:

elements in class java.security.PermissionCollection