Added methods and @Intern annotation to stream pooled strings (a

la String.intern) as we do class names, by sending the value the 
first time and a short code thereafter (with special handling for 
datagrams, where me must continue sending the mapping until we 
know they've been received).  This is mostly useful for the 
lengthy config names and parameter names of Project X, but it 
could conceivably also be used for things like NamedEvents, which 
stream the same object field names many times in the course of a 
stream.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5797 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/io/UnreliableObjectInputStream.java

@@ -43,4 +43,25 @@ public class UnreliableObjectInputStream extends ObjectInputStream
         _classmap.set(code, cmap);
         return cmap;
     }
+
+    @Override // documentation inherited
+    protected void mapIntern (short code, String value)
+    {
+        // see if we already have a mapping
+        String ovalue = (code < _internmap.size()) ? _internmap.get(code) : null;
+        if (ovalue != null) {
+            // sanity check
+            if (!ovalue.equals(value)) {
+                throw new RuntimeException(
+                    "Received mapping for intern that conflicts with existing mapping " +
+                    "[code=" + code + ", ovalue=" + ovalue + ", nvalue=" + value + "]");
+            }
+            return;
+        }
+        // insert null entries for missing mappings
+        for (int ii = 0, nn = (code + 1) - _internmap.size(); ii < nn; ii++) {
+            _internmap.add(null);
+        }
+        _internmap.set(code, value);
+    }
 }