001/* DomainCombiner.java -- Combines ProtectionDomains
002   Copyright (C) 1999, 2002 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038package java.security;
039
040/**
041 * A public interface used to combine two ProtectionDomains in a new
042 * ProtectionDomain and update the current Protection Domains
043 * associated with the current AccessControlContext.
044 *
045 * It can add, subtract, or update ProtectionDomains or possibly
046 * remove duplicates or any possible complex action but just not add
047 * ones that do not already exist in either array.
048 *
049 * @author Mark Benvenuto
050 * @see AccessControlContext
051 * @see AccessController
052 * @since 1.3
053 * @status updated to 1.4
054 */
055public interface DomainCombiner
056{
057  /**
058   * Combines the current ProtectionDomains of the Thread with new
059   * ProtectionDomains.
060   *
061   * @param currentDomains - the ProtectionDomains for the current thread.
062   * @param assignedDomains - ProtectionsDomains to add
063   * @return a new array of all the ProtectionDomains
064   */
065  ProtectionDomain[] combine(ProtectionDomain[] currentDomains,
066                             ProtectionDomain[] assignedDomains);
067} // interface DomainCombiner