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diff --git a/libjava/java/security/DomainCombiner.java b/libjava/java/security/DomainCombiner.java
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+/* DomainCombiner.java - Combines ProtectionDomains
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.security;
+
+/**
+   A public interface used to combine two ProtectionDomains in a new
+   ProtectionDomain and update the current Protection Domains
+   associated with the current AccessControllerContext.
+
+   It can add, subtract, or update ProtectionDomains or possibly
+   remove duplicates or any possible complex action but just not add
+   ones that do not already exist in either array.
+
+   @since JDK 1.3
+   @author Mark Benvenuto 
+ */
+public interface DomainCombiner
+{
+  /**
+     Combines the current ProtectionDomains of the Thread with new
+     ProtectionDomains.
+
+     @param currentDomains - the ProtectionDomains for the current thread.
+     @param assignedDomains - ProtectionsDomains to add
+     @returns a new array of all the ProtectionDomains 
+   */
+  public ProtectionDomain[] combine(ProtectionDomain[]currentDomains,
+				    ProtectionDomain[]assignedDomains);
+}