Add support for clone().

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@783 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/crowd/data/OccupantInfo.java

@@ -1,5 +1,5 @@
 //
-// $Id: OccupantInfo.java,v 1.4 2001/12/14 00:11:17 mdb Exp $
+// $Id: OccupantInfo.java,v 1.5 2001/12/15 04:20:00 mdb Exp $
 
 package com.threerings.crowd.data;
 
@@ -13,15 +13,22 @@ import com.threerings.presents.dobj.DSet;
  * The occupant info object contains all of the information about an
  * occupant of a place that should be shared with other occupants of the
  * place. These objects are stored in the place object itself and are
- * updated when bodies enter and exit a place. A system that builds upon
- * the Crowd framework can extend this class to include extra information
- * about their occupants. They will need to be sure to return the proper
- * class from {@link
- * com.threerings.crowd.server.PlaceManager#getOccupantInfoClass}
- * and populate their occupant info in {@link
+ * updated when bodies enter and exit a place.
+ *
+ * <p> A system that builds upon the Crowd framework can extend this class
+ * to include extra information about their occupants. They will need to
+ * be sure to return the proper class from {@link
+ * com.threerings.crowd.server.PlaceManager#getOccupantInfoClass} and
+ * populate their occupant info in {@link
  * com.threerings.crowd.server.PlaceManager#populateOccupantInfo}.
+ *
+ * <p> Note also that this class implements {@link Cloneable} which means
+ * that if derived classes add non-primitive attributes, they are
+ * responsible for adding the code to clone those attributes when a clone
+ * is requested.
  */
-public class OccupantInfo implements DSet.Element
+public class OccupantInfo
+    implements DSet.Element, Cloneable
 {
     /** The body object id of this occupant (and our element key). */
     public Integer bodyOid;
@@ -41,6 +48,18 @@ public class OccupantInfo implements DSet.Element
         return bodyOid;
     }
 
+    /**
+     * Generates a cloned copy of this instance.
+     */
+    public Object clone ()
+    {
+        try {
+            return super.clone();
+        } catch (CloneNotSupportedException cnse) {
+            throw new RuntimeException("WTF? " + cnse);
+        }
+    }
+
     // documentation inherited
     public void writeTo (DataOutputStream out)
         throws IOException