Allowing driver loaders to refer to classes loaded by others.

Change-Id: Ife4e50758620d4c052a7bb81740d9b9305647317
diff --git a/core/api/src/main/java/org/onosproject/net/driver/BehaviourClassResolver.java b/core/api/src/main/java/org/onosproject/net/driver/BehaviourClassResolver.java
new file mode 100644
index 0000000..a5474f0
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/driver/BehaviourClassResolver.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2016 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.net.driver;
+
+/**
+ * Entity capable of resolving a class using its name.
+ */
+public interface BehaviourClassResolver {
+
+    /**
+     * Returns the class corresponding to the specified class name.
+     * @param className class className
+     * @return
+     */
+    Class<? extends Behaviour> getBehaviourClass(String className);
+
+}