java.io
Class FilePermissionCollection

java.lang.Object
  java.security.PermissionCollection
      java.io.FilePermissionCollection

All Implemented Interfaces:

Serializable

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".

Author:

Marianne Mueller, Roland Schemers

See Also:

Permission, Permissions, PermissionCollection, Serialized Form

Field Summary

private List	perms
private static ObjectStreamField[]	serialPersistentFields
private static long	serialVersionUID

Fields inherited from class java.security.PermissionCollection

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".
private void	readObject(ObjectInputStream in)
private void	writeObject(ObjectOutputStream out)

Methods inherited from class java.security.PermissionCollection

isReadOnly, setReadOnly, toString

Methods inherited from class java.lang.Object

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

Field Detail

perms

private transient List perms

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

serialPersistentFields

private static final ObjectStreamField[] serialPersistentFields

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.

Throws:

IllegalArgumentException - - if the permission is not a FilePermission

SecurityException - - if this FilePermissionCollection object has been marked readonly

implies

public boolean implies(java.security.Permission permission)

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

Returns:

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

elements

public Enumeration elements()

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

Returns:

an enumeration of all the FilePermission objects.

writeObject

private void writeObject(ObjectOutputStream out)
                  throws IOException

Throws:

IOException

readObject

private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException

Throws:

IOException

ClassNotFoundException