moving igmp app to use access device config

Change-Id: I2940b3db9c6da3a3c43c192a2b390c46b40749e7
diff --git a/api/src/main/java/org/onosproject/olt/AccessDeviceConfig.java b/api/src/main/java/org/onosproject/olt/AccessDeviceConfig.java
new file mode 100644
index 0000000..07b73c8
--- /dev/null
+++ b/api/src/main/java/org/onosproject/olt/AccessDeviceConfig.java
@@ -0,0 +1,55 @@
+/*
+ * 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.olt;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.onlab.packet.VlanId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.config.Config;
+
+import java.util.Optional;
+
+/**
+ * Config object for access device data.
+ */
+public class AccessDeviceConfig extends Config<DeviceId> {
+
+    private static final String UPLINK = "uplink";
+    private static final String VLAN = "vlan";
+    private static final String DEFAULT_VLAN = "defaultVlan";
+
+    /**
+     * Gets the access device configuration for this device.
+     *
+     * @return access device configuration
+     */
+    public AccessDeviceData getOlt() {
+        PortNumber uplink = PortNumber.portNumber(node.path(UPLINK).asText());
+        VlanId vlan = VlanId.vlanId(Short.parseShort(node.path(VLAN).asText()));
+        JsonNode defaultVlanNode = node.path(DEFAULT_VLAN);
+
+        Optional<VlanId> defaultVlan;
+        if (defaultVlanNode.isMissingNode()) {
+            defaultVlan = Optional.empty();
+        } else {
+            defaultVlan = Optional.of(VlanId.vlanId(Short.parseShort(defaultVlanNode.asText())));
+        }
+
+        return new AccessDeviceData(subject(), uplink, vlan, defaultVlan);
+    }
+}