Generic extensions to the treatment API to support protocol extensions like
OF experimenter actions.
Change-Id: I88cc5896d17fdbf89807f911f9c23e4f19f6a5ad
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/ExtensionResolver.java b/core/api/src/main/java/org/onosproject/net/behaviour/ExtensionResolver.java
new file mode 100644
index 0000000..54cbc7a
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/ExtensionResolver.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.net.behaviour;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.driver.HandlerBehaviour;
+import org.onosproject.net.flow.instructions.ExtensionInstruction;
+import org.onosproject.net.flow.instructions.ExtensionType;
+
+/**
+ * Provides access to the extension implemented by this driver.
+ */
+@Beta
+public interface ExtensionResolver extends HandlerBehaviour {
+
+ /**
+ * Gets an extension instruction instance of the specified type, if supported
+ * by the driver.
+ *
+ * @param type type of extension to get
+ * @return extension instruction
+ * @throws UnsupportedOperationException if the extension type is not
+ * supported by this driver
+ */
+ ExtensionInstruction getExtensionInstruction(ExtensionType type);
+}