This class implements the DomainCombiner interface. It is used to merge permissions based on code source and code signers with permissions granted to the specified Subject. A SubjectDomainCombiner is created by the Subject.doAs( ) and Subject.doAsPrivileged( ) methods for use in by the AccessControlContext.

Figure 19-5. javax.security.auth.SubjectDomainCombiner

public class SubjectDomainCombiner implements java.security.DomainCombiner {
// Public Constructors
     public SubjectDomainCombiner(Subject subject);  
// Public Instance Methods
     public Subject getSubject( );  
// Methods Implementing DomainCombiner
     public java.security.ProtectionDomain[ ] combine(java.security.ProtectionDomain[ ] 
        currentDomains, 
        java.security.ProtectionDomain[ ] assignedDomains);  
}