java.security
Class AccessControlContext

java.lang.Object
  java.security.AccessControlContext

public final class AccessControlContext
extends Object

An AccessControlContext is used to make system resource access decisions based on the context it encapsulates.

More specifically, it encapsulates a context and has a single method, checkPermission, that is equivalent to the checkPermission method in the AccessController class, with one difference: The AccessControlContext checkPermission method makes access decisions based on the context it encapsulates, rather than that of the current execution thread.

Thus, the purpose of AccessControlContext is for those situations where a security check that should be made within a given context actually needs to be done from within a different context (for example, from within a worker thread).

An AccessControlContext is created by calling the AccessController.getContext method. The getContext method takes a "snapshot" of the current calling context, and places it in an AccessControlContext object, which it returns. A sample call is the following:

 
   AccessControlContext acc = AccessController.getContext()
 
 

Code within a different context can subsequently call the checkPermission method on the previously-saved AccessControlContext object. A sample call is the following:

 
   acc.checkPermission(permission)
 
 

See Also:

AccessController

Constructor Summary

AccessControlContext(AccessControlContext acc, DomainCombiner combiner)
Create a new AccessControlContext with the given AccessControlContext and DomainCombiner.

AccessControlContext(ProtectionDomain[] context)
Create an AccessControlContext with the given set of ProtectionDomains.

Method Summary

void	checkPermission(Permission perm) Determines whether the access request indicated by the specified permission should be allowed or denied, based on the security policy currently in effect, and the context in this object.
boolean	equals(Object obj) Checks two AccessControlContext objects for equality.
DomainCombiner	getDomainCombiner() Get the DomainCombiner associated with this AccessControlContext.
int	hashCode() Returns the hash code value for this context.

Methods inherited from class java.lang.Object

clone,