Added local attributes to DObject. These are objects that are stored only on

the local JVM (in general we'll use them on the server). The idea is to get rid
of all of our messy transients in BodyObject on down (and possibly other
places) and encapsulate them in a nice ClientLocal object (extended to
BodyLocal and on down).


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5472 542714f4-19e9-0310-aa3c-eee0fc999fb1

tests/src/java/com/threerings/presents/dobj/LocalAttrTest.java

@@ -0,0 +1,71 @@
+//
+// $Id$
+
+package com.threerings.presents.dobj;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Tests distributed object local attributes.
+ */
+public class LocalAttrTest
+{
+    public static class BaseLocalAttr
+    {
+    }
+
+    public static class DerivedLocalAttr extends BaseLocalAttr
+    {
+    }
+
+    @Test public void testSetGet ()
+    {
+        DObject o1 = new DObject();
+        BaseLocalAttr base = new BaseLocalAttr();
+        o1.setLocalAttribute(BaseLocalAttr.class, base);
+        assertSame(o1.getLocalAttribute(BaseLocalAttr.class), base);
+    }
+
+    @Test public void testPoly ()
+    {
+        // polymorphic usage
+        DObject o2 = new DObject();
+        DerivedLocalAttr derived = new DerivedLocalAttr();
+        o2.setLocalAttribute(DerivedLocalAttr.class, derived);
+        BaseLocalAttr upcasted = derived;
+        assertSame(o2.getLocalAttribute(DerivedLocalAttr.class), derived);
+        assertSame(o2.getLocalAttribute(BaseLocalAttr.class), upcasted);
+
+        // cannot overwrite already set attribute
+        DObject o3 = new DObject();
+        o3.setLocalAttribute(DerivedLocalAttr.class, derived);
+        try {
+            o3.setLocalAttribute(DerivedLocalAttr.class, new DerivedLocalAttr());
+            fail("Object allowed attribute overwrite.");
+        } catch (IllegalStateException ise) {
+            // good
+        }
+        try {
+            o3.setLocalAttribute(BaseLocalAttr.class, new BaseLocalAttr());
+            fail("Object allowed polymorhic attribute overwrite.");
+        } catch (IllegalStateException ise) {
+            // good
+        }
+    }
+
+    @Test public void testSetClearSet ()
+    {
+        DObject o1 = new DObject();
+        BaseLocalAttr base = new BaseLocalAttr();
+        o1.setLocalAttribute(BaseLocalAttr.class, base);
+        assertSame(o1.getLocalAttribute(BaseLocalAttr.class), base);
+        o1.setLocalAttribute(BaseLocalAttr.class, null);
+        assertNull(o1.getLocalAttribute(BaseLocalAttr.class));
+        BaseLocalAttr nbase = new BaseLocalAttr();
+        o1.setLocalAttribute(BaseLocalAttr.class, nbase);
+        assertNotSame(o1.getLocalAttribute(BaseLocalAttr.class), base);
+        assertSame(o1.getLocalAttribute(BaseLocalAttr.class), nbase);
+    }
+}