added FlowObjectiveService to act as an objective manager between applications and drivers

Change-Id: I4dc44db8bafae8a55b7663895c87b1b08645637f
diff --git a/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveService.java b/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveService.java
new file mode 100644
index 0000000..dc5e5e1
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveService.java
@@ -0,0 +1,34 @@
+/*
+ * 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.flowobjective;
+
+import org.onosproject.net.DeviceId;
+
+import java.util.Collection;
+import java.util.concurrent.Future;
+
+/**
+ * Created by ash on 07/04/15.
+ */
+public interface FlowObjectiveService {
+
+    Future<Boolean> filter(DeviceId deviceId, Collection<FilteringObjective> filterObjectives);
+
+    Future<Boolean> forward(DeviceId deviceId, Collection<ForwardingObjective> forwardingObjectives);
+
+    Future<Boolean> next(DeviceId deviceId, Collection<NextObjective> nextObjectives);
+
+}