--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/rmi/activation/ActivationGroupID.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,115 @@
+/*
+ * Copyright 1997-1999 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.rmi.activation;
+
+import java.rmi.server.UID;
+
+/**
+ * The identifier for a registered activation group serves several
+ * purposes: <ul>
+ * <li>identifies the group uniquely within the activation system, and
+ * <li>contains a reference to the group's activation system so that the
+ * group can contact its activation system when necessary.</ul><p>
+ *
+ * The <code>ActivationGroupID</code> is returned from the call to
+ * <code>ActivationSystem.registerGroup</code> and is used to identify
+ * the group within the activation system. This group id is passed
+ * as one of the arguments to the activation group's special constructor
+ * when an activation group is created/recreated.
+ *
+ * @author      Ann Wollrath
+ * @see         ActivationGroup
+ * @see         ActivationGroupDesc
+ * @since       1.2
+ */
+public class ActivationGroupID implements java.io.Serializable {
+    /**
+     * @serial The group's activation system.
+     */
+    private ActivationSystem system;
+
+    /**
+     * @serial The group's unique id.
+     */
+    private UID uid = new UID();
+
+    /** indicate compatibility with the Java 2 SDK v1.2 version of class */
+    private  static final long serialVersionUID = -1648432278909740833L;
+
+    /**
+     * Constructs a unique group id.
+     *
+     * @param system the group's activation system
+     * @since 1.2
+     */
+    public ActivationGroupID(ActivationSystem system) {
+        this.system = system;
+    }
+
+    /**
+     * Returns the group's activation system.
+     * @return the group's activation system
+     * @since 1.2
+     */
+    public ActivationSystem getSystem() {
+        return system;
+    }
+
+    /**
+     * Returns a hashcode for the group's identifier.  Two group
+     * identifiers that refer to the same remote group will have the
+     * same hash code.
+     *
+     * @see java.util.Hashtable
+     * @since 1.2
+     */
+    public int hashCode() {
+        return uid.hashCode();
+    }
+
+    /**
+     * Compares two group identifiers for content equality.
+     * Returns true if both of the following conditions are true:
+     * 1) the unique identifiers are equivalent (by content), and
+     * 2) the activation system specified in each
+     *    refers to the same remote object.
+     *
+     * @param   obj     the Object to compare with
+     * @return  true if these Objects are equal; false otherwise.
+     * @see             java.util.Hashtable
+     * @since 1.2
+     */
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        } else if (obj instanceof ActivationGroupID) {
+            ActivationGroupID id = (ActivationGroupID)obj;
+            return (uid.equals(id.uid) && system.equals(id.system));
+        } else {
+            return false;
+        }
+    }
+}