javax.security.auth
Class SubjectDomainCombiner

java.lang.Object
  javax.security.auth.SubjectDomainCombiner

All Implemented Interfaces:

DomainCombiner

public class SubjectDomainCombiner
extends Object
implements DomainCombiner

A SubjectDomainCombiner updates ProtectionDomains with Principals from the Subject associated with this SubjectDomainCombiner.

Constructor Summary

SubjectDomainCombiner(Subject subject)
Associate the provided Subject with this SubjectDomainCombiner.

Method Summary

ProtectionDomain[]	combine(ProtectionDomain[] currentDomains, ProtectionDomain[] assignedDomains) Update the relevant ProtectionDomains with the Principals from the Subject associated with this SubjectDomainCombiner.
Subject	getSubject() Get the Subject associated with this SubjectDomainCombiner.

Methods inherited from class java.lang.Object

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

Constructor Detail

SubjectDomainCombiner

public SubjectDomainCombiner(Subject subject)

Associate the provided Subject with this SubjectDomainCombiner.

Parameters:

subject - the Subject to be associated with with this SubjectDomainCombiner.

Method Detail

getSubject

public Subject getSubject()

Get the Subject associated with this SubjectDomainCombiner.

Returns:

the Subject associated with this SubjectDomainCombiner, or null if no Subject is associated with this SubjectDomainCombiner.

Throws:

SecurityException - if the caller does not have permission to get the Subject associated with this SubjectDomainCombiner.

combine

public ProtectionDomain[] combine(ProtectionDomain[] currentDomains,
                                  ProtectionDomain[] assignedDomains)

Update the relevant ProtectionDomains with the Principals from the Subject associated with this SubjectDomainCombiner.

A new ProtectionDomain instance is created for each ProtectionDomain in the currentDomains array. Each new ProtectionDomain instance is created using the CodeSource, Permissions and ClassLoader from the corresponding ProtectionDomain in currentDomains, as well as with the Principals from the Subject associated with this SubjectDomainCombiner.

All of the newly instantiated ProtectionDomains are combined into a new array. The ProtectionDomains from the assignedDomains array are appended to this new array, and the result is returned.

Note that optimizations such as the removal of duplicate ProtectionDomains may have occurred. In addition, caching of ProtectionDomains may be permitted.

Specified by:

combine in interface DomainCombiner

Parameters:

currentDomains - the ProtectionDomains associated with the current execution Thread, up to the most recent privileged ProtectionDomain. The ProtectionDomains are are listed in order of execution, with the most recently executing ProtectionDomain residing at the beginning of the array. This parameter may be null if the current execution Thread has no associated ProtectionDomains.

assignedDomains - the ProtectionDomains inherited from the parent Thread, or the ProtectionDomains from the privileged context, if a call to AccessController.doPrivileged(..., context) had occurred This parameter may be null if there were no ProtectionDomains inherited from the parent Thread, or from the privileged context.

Returns:

a new array consisting of the updated ProtectionDomains, or null.