1 files changed, 31 insertions, 0 deletions
diff --git a/docs/teaching/exercises/answers/Answer2h.java b/docs/teaching/exercises/answers/Answer2h.java
new file mode 100644
index 000000000..3dcc47bef
--- /dev/null
+++ b/docs/teaching/exercises/answers/Answer2h.java
@@ -0,0 +1,31 @@
+/* *******************************************************************
+ * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
+ * All rights reserved. 
+ * This program and the accompanying materials are made available 
+ * under the terms of the Common Public License v1.0 
+ * which accompanies this distribution and is available at 
+ * http://www.eclipse.org/legal/cpl-v10.html 
+ *  
+ * Contributors: 
+ *     PARC     initial implementation 
+ * ******************************************************************/
+
+package answers;
+
+import figures.*;
+
+import java.awt.Rectangle;
+
+aspect Answer2h {
+    void around(FigureElement fe, int dx, int dy):
+            target(fe) && call(void move(int, int)) && args(dx, dy) {
+        Rectangle preBounds = new Rectangle(fe.getBounds());
+        proceed(fe, dx, dy);
+
+        preBounds.translate(dx, dy);
+
+        if (!preBounds.equals(fe.getBounds())) {
+            throw new IllegalStateException("bounds don't match move");
+        }
+    }
+}