java.security
Class PermissionCollection

java.lang.Object
  java.security.PermissionCollection

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AllPermissionCollection, BasicPermissionCollection, FilePermissionCollection, Permissions, PermissionsHash, PropertyPermissionCollection, SocketPermissionCollection, UnresolvedPermissionCollection

public abstract class PermissionCollection
extends Object
implements Serializable

Abstract superclass of classes which are collections of Permission objects.

See Also:

Serialized Form

Constructor Summary

PermissionCollection()

Method Summary

abstract void	add(Permission permission) Adds the argument to the collection.
abstract Enumeration<Permission>	elements() Returns an enumeration of the permissions in the receiver.
abstract boolean	implies(Permission permission) Indicates whether the argument permission is implied by the permissions contained in the receiver.
boolean	isReadOnly() Indicates whether new permissions can be added to the receiver.
void	setReadOnly() Marks the receiver as read only, so that no new permissions can be added to it.
String	toString() Returns a string containing a concise, human-readable description of the receiver.

Methods inherited from class java.lang.Object

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

Constructor Detail

PermissionCollection

public PermissionCollection()

Method Detail

add

public abstract void add(Permission permission)

Adds the argument to the collection.

Parameters:

permission - java.security.Permission the permission to add to the collection.

Throws:

IllegalStateException - if the collection is read only.

elements

public abstract Enumeration<Permission> elements()

Returns an enumeration of the permissions in the receiver.

Returns:

Enumeration the permissions in the receiver.

implies

public abstract boolean implies(Permission permission)

Indicates whether the argument permission is implied by the permissions contained in the receiver.

Parameters:

permission - java.security.Permission the permission to check

Returns:

boolean true if the argument permission is implied by the permissions in the receiver, and false if it is not.

isReadOnly

public boolean isReadOnly()

Indicates whether new permissions can be added to the receiver.

Returns:

boolean true if the receiver is read only false if new elements can still be added to the receiver.

setReadOnly

public void setReadOnly()

Marks the receiver as read only, so that no new permissions can be added to it.

toString

public String toString()

Returns a string containing a concise, human-readable description of the receiver.

Overrides:

toString in class Object

Returns:

a printable representation for the receiver.