ONOS-3759 Group default provider

Change-Id: I318c8036a1836d13f57187bfd28464c740e09f08

+/*
+ * 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.group;
+
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.driver.HandlerBehaviour;
+
+/**
+ * Group programmable device behaviour.
+ */
+public interface GroupProgrammable extends HandlerBehaviour {
+
+    /**
+     * Performs the Group operations for the specified device.
+     *
+     * @param deviceId ID of the device
+     * @param groupOps operations to be performed
+     */
+    void performGroupOperation(DeviceId deviceId, GroupOperations groupOps);
+}

+/*
+ * 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.group.impl;
+
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.group.GroupOperations;
+import org.onosproject.net.group.GroupProgrammable;
+import org.onosproject.net.group.GroupProvider;
+import org.onosproject.net.provider.AbstractProvider;
+import org.onosproject.net.provider.ProviderId;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Driver-based Group rule provider.
+ */
+public class GroupDriverProvider extends AbstractProvider implements GroupProvider {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    // To be extracted for reuse as we deal with other.
+    private static final String SCHEME = "default";
+    private static final String PROVIDER_NAME = "org.onosproject.provider";
+    protected DeviceService deviceService;
+
+    public GroupDriverProvider() {
+        super(new ProviderId(SCHEME, PROVIDER_NAME));
+    }
+
+    /**
+     * Initializes the provider with the necessary device service.
+     *
+     * @param deviceService device service
+     */
+    void init(DeviceService deviceService) {
+        this.deviceService = deviceService;
+    }
+
+    @Override
+    public void performGroupOperation(DeviceId deviceId, GroupOperations groupOps) {
+        GroupProgrammable programmable = getGroupProgrammable(deviceId);
+        if (programmable != null) {
+            programmable.performGroupOperation(deviceId, groupOps);
+        }
+    }
+
+    private GroupProgrammable getGroupProgrammable(DeviceId deviceId) {
+        GroupProgrammable programmable = deviceService.getDevice(deviceId).as(GroupProgrammable.class);
+        if (programmable == null) {
+            log.warn("Device {} is not group programmable");
+        }
+        return programmable;
+    }
+}

@@ -87,6 +87,7 @@ public class GroupManager
     @Property(name = "purgeOnDisconnection", boolValue = false,
             label = "Purge entries associated with a device when the device goes offline")
     private boolean purgeOnDisconnection = false;
+    private final  GroupDriverProvider defaultProvider = new GroupDriverProvider();
 
     @Activate
     public void activate(ComponentContext context) {
@@ -111,6 +112,12 @@ public class GroupManager
         if (context != null) {
             readComponentConfiguration(context);
         }
+        defaultProvider.init(deviceService);
+    }
+
+    @Override
+    protected GroupProvider defaultProvider() {
+        return defaultProvider;
     }
 
     /**