java.security
Class BasicPermissionCollection

java.lang.Object
  |
  +--java.security.PermissionCollection
        |
        +--java.security.BasicPermissionCollection

All Implemented Interfaces:

Serializable

final class BasicPermissionCollection

extends PermissionCollection

implements Serializable

A BasicPermissionCollection stores a collection of BasicPermission permissions. BasicPermission 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 in an efficient (and consistent) manner. A BasicPermissionCollection handles comparing a permission like "a.b.c.d.e" with a Permission such as "a.b.*", or "*".

Version:

1.33 02/01/02

Author:

Roland Schemers

See Also:

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

Field Summary

private boolean	all_allowed This is set to true if this BasicPermissionCollection contains a BasicPermission with '*' as its permission name.
private Class	permClass The class to which all BasicPermissions in this BasicPermissionCollection belongs.
private Hashtable	permissions The BasicPermissions in this BasicPermissionCollection.
(package private) static long	serialVersionUID

Fields inherited from class java.security.PermissionCollection

Constructor Summary

BasicPermissionCollection()
Create an empty BasicPermissionCollection object.

Method Summary

void	add(Permission permission) Adds a permission to the BasicPermissions.
Enumeration	elements() Returns an enumeration of all the BasicPermission objects in the container.
boolean	implies(Permission permission) Check and see if this set of permissions implies the permissions expressed in "permission".
private void	readObject(ObjectInputStream s) readObject is called to restore the state of the BasicPermissionCollection from a stream.

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

serialVersionUID

static final long serialVersionUID

permissions

private Hashtable permissions

The BasicPermissions in this BasicPermissionCollection. All BasicPermissions in the collection must belong to the same class.

all_allowed

private boolean all_allowed

This is set to true if this BasicPermissionCollection contains a BasicPermission with '*' as its permission name.

permClass

private Class permClass

The class to which all BasicPermissions in this BasicPermissionCollection belongs.

Constructor Detail

BasicPermissionCollection

public BasicPermissionCollection()

Create an empty BasicPermissionCollection object.

Method Detail

add

public void add(Permission permission)

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

Specified by:

add in class PermissionCollection

Parameters:

permission - the Permission object to add.

implies

public boolean implies(Permission permission)

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

Specified by:

implies in class PermissionCollection

Parameters:

permission - the Permission object to compare.

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 BasicPermission objects in the container.

Specified by:

elements in class PermissionCollection

Returns:

an enumeration of all the BasicPermission objects.

readObject

private void readObject(ObjectInputStream s)
                 throws IOException,
                        ClassNotFoundException

readObject is called to restore the state of the BasicPermissionCollection from a stream.

IOException

ClassNotFoundException