diff --git a/protocols/openflow/api/src/main/java/org/onosproject/openflow/controller/ExtensionSelectorInterpreter.java b/protocols/openflow/api/src/main/java/org/onosproject/openflow/controller/ExtensionSelectorInterpreter.java
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+++ b/protocols/openflow/api/src/main/java/org/onosproject/openflow/controller/ExtensionSelectorInterpreter.java
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+/*
+ * 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.openflow.controller;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.driver.HandlerBehaviour;
+import org.onosproject.net.flow.criteria.ExtensionSelector;
+import org.onosproject.net.flow.criteria.ExtensionSelectorType;
+import org.projectfloodlight.openflow.protocol.OFFactory;
+import org.projectfloodlight.openflow.protocol.oxm.OFOxm;
+
+/**
+ * Interprets extension selectors and converts them to/from OpenFlow objects.
+ */
+@Beta
+public interface ExtensionSelectorInterpreter extends HandlerBehaviour {
+
+    /**
+     * Returns true if the given extension selector is supported by this
+     * driver.
+     *
+     * @param extensionSelectorType extension selector type
+     * @return true if the instruction is supported, otherwise false
+     */
+    boolean supported(ExtensionSelectorType extensionSelectorType);
+
+    /**
+     * Maps an extension selector to an OpenFlow OXM.
+     *
+     * @param factory OpenFlow factory
+     * @param extensionSelector extension selector
+     * @return OpenFlow action
+     */
+    OFOxm<?> mapSelector(OFFactory factory, ExtensionSelector extensionSelector);
+
+    /**
+     * Maps an OpenFlow OXM to an extension selector.
+     *
+     * @param oxm OpenFlow OXM
+     * @return extension selector
+     */
+    ExtensionSelector mapOxm(OFOxm<?> oxm);
+}