001 /* SubjectDomainCombiner.java -- domain combiner for Subjects.
002 Copyright (C) 2004, 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package javax.security.auth;
040
041 import java.security.DomainCombiner;
042 import java.security.Principal;
043 import java.security.ProtectionDomain;
044
045 import java.util.LinkedList;
046
047 public class SubjectDomainCombiner implements DomainCombiner
048 {
049
050 // Field.
051 // -------------------------------------------------------------------------
052
053 private final Subject subject;
054
055 // Constructor.
056 // -------------------------------------------------------------------------
057
058 public SubjectDomainCombiner (final Subject subject)
059 {
060 this.subject = subject;
061 }
062
063 // Instance methods.
064 // -------------------------------------------------------------------------
065
066 public ProtectionDomain[] combine (final ProtectionDomain[] current,
067 final ProtectionDomain[] assigned)
068 {
069 LinkedList domains = new LinkedList();
070 Principal[] principals = null;
071 if (subject != null)
072 principals = (Principal[]) subject.getPrincipals().toArray (new Principal[0]);
073 if (current != null)
074 {
075 for (int i = 0; i < current.length; i++)
076 {
077 domains.add (new ProtectionDomain (current[i].getCodeSource(),
078 current[i].getPermissions(),
079 current[i].getClassLoader(),
080 principals));
081 }
082 }
083 if (assigned != null)
084 {
085 for (int i = 0; i < assigned.length; i++)
086 {
087 domains.add (assigned[i]);
088 }
089 }
090 return (ProtectionDomain[]) domains.toArray (new ProtectionDomain[domains.size()]);
091 }
092
093 public Subject getSubject()
094 {
095 return subject;
096 }
097 }