diff --git a/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/JsonBlob.java b/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/JsonBlob.java
new file mode 100644
index 0000000..5c20b62
--- /dev/null
+++ b/apps/demo/cord-gui/src/main/java/org/onosproject/cord/gui/model/JsonBlob.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.onosproject.cord.gui.model;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+/**
+ * An object that can be serialized to JSON.
+ */
+public interface JsonBlob {
+
+    /**
+     * Returns an Object Node representation of this object.
+     *
+     * @return object node hierarchy
+     */
+    JsonNode toJsonNode();
+
+    /**
+     * Returns a JSON string representation of this object.
+     *
+     * @return JSON serialization
+     */
+    String toJson();
+}