adding agent config

Change-Id: Id6ca390d4aaeb7760a31d3327b16b953ed51df37

+package org.onosproject.cordconfig.access;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.collect.Maps;
+import org.onlab.packet.MacAddress;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.config.Config;
+
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * Represents configuration for an OLT agent.
+ */
+public class AccessAgentConfig extends Config<DeviceId> {
+
+    private static final String OLTS = "olts";
+    private static final String AGENT_MAC = "mac";
+
+    // TODO: Remove this, it is only useful as long as XOS doesn't manage this.
+    private static final String VTN_LOCATION = "vtn-location";
+
+    /**
+     * Gets the access agent configuration for this device.
+     *
+     * @return access agent configuration
+     */
+    public AccessAgentData getAgent() {
+        JsonNode olts = node.get(OLTS);
+        if (!olts.isObject()) {
+            throw new IllegalArgumentException(OLTS + " should be an object");
+        }
+        Map<ConnectPoint, MacAddress> oltMacInfo = Maps.newHashMap();
+        olts.fields().forEachRemaining(item -> oltMacInfo.put(
+                new ConnectPoint(subject(), PortNumber.fromString(item.getKey())),
+                MacAddress.valueOf(item.getValue().asText())));
+
+        MacAddress agentMac = MacAddress.valueOf(node.path(AGENT_MAC).asText());
+
+        JsonNode vtn = node.path(VTN_LOCATION);
+        Optional<ConnectPoint> vtnLocation;
+        if (vtn.isMissingNode()) {
+            vtnLocation = Optional.empty();
+        } else {
+            vtnLocation = Optional.of(ConnectPoint.deviceConnectPoint(vtn.asText()));
+        }
+
+        return new AccessAgentData(subject(), oltMacInfo, agentMac, vtnLocation);
+    }
+
+}

+/*
+ * Copyright 2016-present 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.cordconfig.access;
+
+import com.google.common.collect.ImmutableMap;
+import org.onlab.packet.MacAddress;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+
+import java.util.Map;
+import java.util.Optional;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Information about an access agent.
+ */
+public class AccessAgentData {
+    private static final String DEVICE_ID_MISSING = "Device ID cannot be null";
+    private static final String OLT_INFO_MISSING = "OLT information cannot be null";
+    private static final String AGENT_MAC_MISSING = "Agent mac cannot be null";
+    private static final String VTN_MISSING = "VTN location cannot be null";
+
+
+    private final Map<ConnectPoint, MacAddress> oltMacInfo;
+    private final MacAddress agentMac;
+    private final Optional<ConnectPoint> vtnLocation;
+    private final DeviceId deviceId;
+
+
+    /**
+     * Constucts an agent configuration for a given device.
+     *
+     * @param deviceId    access device id
+     * @param oltMacInfo  a map of olt chips and their mac address
+     * @param agentMac    the mac address of the agent
+     * @param vtnLocation the location of the agent
+     */
+    public AccessAgentData(DeviceId deviceId, Map<ConnectPoint, MacAddress> oltMacInfo,
+                           MacAddress agentMac, Optional<ConnectPoint> vtnLocation) {
+        this.deviceId = checkNotNull(deviceId, DEVICE_ID_MISSING);
+        this.oltMacInfo = checkNotNull(oltMacInfo, OLT_INFO_MISSING);
+        this.agentMac = checkNotNull(agentMac, AGENT_MAC_MISSING);
+        this.vtnLocation = checkNotNull(vtnLocation, VTN_MISSING);
+    }
+
+    /**
+     * Retrieves the access device ID.
+     *
+     * @return device ID
+     */
+    public DeviceId deviceId() {
+        return deviceId;
+    }
+
+    /**
+     * Returns the mapping of olt chips to mac addresses. Each chip is
+     * symbolized by a connect point.
+     *
+     * @return a mapping of chips (as connect points) to mac addresses
+     */
+    public Map<ConnectPoint, MacAddress> getOltMacInfo() {
+        return ImmutableMap.copyOf(oltMacInfo);
+    }
+
+    /**
+     * Reuturns the agents mac address.
+     *
+     * @return a mac address
+     */
+    public MacAddress getAgentMac() {
+        return agentMac;
+    }
+
+    /**
+     * Returns the location of the agent.
+     *
+     * @return a connection point
+     */
+    public Optional<ConnectPoint> getVtnLocation() {
+        return vtnLocation;
+    }
+}