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diff --git a/lib/jetty/org/eclipse/jetty/server/UserIdentity.java b/lib/jetty/org/eclipse/jetty/server/UserIdentity.java
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+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.server;
+
+import java.security.Principal;
+import java.util.Map;
+
+import javax.security.auth.Subject;
+
+/* ------------------------------------------------------------ */
+/** User object that encapsulates user identity and operations such as run-as-role actions,
+ * checking isUserInRole and getUserPrincipal.
+ *
+ * Implementations of UserIdentity should be immutable so that they may be
+ * cached by Authenticators and LoginServices.
+ *
+ */
+public interface UserIdentity
+{
+    /* ------------------------------------------------------------ */
+    /**
+     * @return The user subject
+     */
+    Subject getSubject();
+
+    /* ------------------------------------------------------------ */
+    /**
+     * @return The user principal
+     */
+    Principal getUserPrincipal();
+
+    /* ------------------------------------------------------------ */
+    /** Check if the user is in a role.
+     * This call is used to satisfy authorization calls from
+     * container code which will be using translated role names.
+     * @param role A role name.
+     * @param scope
+     * @return True if the user can act in that role.
+     */
+    boolean isUserInRole(String role, Scope scope);
+
+
+    /* ------------------------------------------------------------ */
+    /**
+     * A UserIdentity Scope.
+     * A scope is the environment in which a User Identity is to
+     * be interpreted. Typically it is set by the target servlet of
+     * a request.
+     */
+    interface Scope
+    {
+        /* ------------------------------------------------------------ */
+        /**
+         * @return The context path that the identity is being considered within
+         */
+        String getContextPath();
+
+        /* ------------------------------------------------------------ */
+        /**
+         * @return The name of the identity context. Typically this is the servlet name.
+         */
+        String getName();
+
+        /* ------------------------------------------------------------ */
+        /**
+         * @return A map of role reference names that converts from names used by application code
+         * to names used by the context deployment.
+         */
+        Map<String,String> getRoleRefMap();
+    }
+
+    /* ------------------------------------------------------------ */
+    public interface UnauthenticatedUserIdentity extends UserIdentity
+    {
+    }
+
+    /* ------------------------------------------------------------ */
+    public static final UserIdentity UNAUTHENTICATED_IDENTITY = new UnauthenticatedUserIdentity()
+    {
+        public Subject getSubject()
+        {
+            return null;
+        }
+
+        public Principal getUserPrincipal()
+        {
+            return null;
+        }
+
+        public boolean isUserInRole(String role, Scope scope)
+        {
+            return false;
+        }
+
+        @Override
+        public String toString()
+        {
+            return "UNAUTHENTICATED";
+        }
+    };
+}