[ONOS-3119] Flow classification rules installer for SFC.

Change-Id: Ife696b1deb8c6b71a73e65bfdaf6639ec092013b

+/*
+ * 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.sfc.installer;
+
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.vtnrsc.FlowClassifier;
+import org.onosproject.vtnrsc.PortPair;
+
+/**
+ * Abstraction of an entity which installs flow classification rules in ovs.
+ */
+public interface FlowClassifierInstaller {
+
+    /**
+     * Install flow classifier rules.
+     *
+     * @param flowClassifier Flow Classifier
+     * @param portPair Port pair
+     */
+    void install(FlowClassifier flowClassifier, PortPair portPair);
+
+    /**
+     * Programs forwarding object for flow classifier.
+     *
+     * @param flowClassifier flow classifier
+     * @param portPair port pair
+     * @param appid application id
+     * @param type forwarding objective operation type
+     */
+    void programFlowClassification(FlowClassifier flowClassifier, PortPair portPair, ApplicationId appid,
+            Objective.Operation type);
+}