ONOS-3658 - Adding REST APIs for query and management of device keys.

Change-Id: I3c70660a15d9085409e43d2d14120d29fd5020be
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java b/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java
index f5312f8..59652f9 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java
@@ -45,7 +45,8 @@
                 StatisticsWebResource.class,
                 MetricsWebResource.class,
                 FlowObjectiveWebResource.class,
-                MulticastRouteWebResource.class
+                MulticastRouteWebResource.class,
+                DeviceKeyWebResource.class
         );
     }
 }
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/DeviceKeyWebResource.java b/web/api/src/main/java/org/onosproject/rest/resources/DeviceKeyWebResource.java
new file mode 100644
index 0000000..0f9af8f
--- /dev/null
+++ b/web/api/src/main/java/org/onosproject/rest/resources/DeviceKeyWebResource.java
@@ -0,0 +1,128 @@
+/*
+ * 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.rest.resources;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.net.key.DeviceKey;
+import org.onosproject.net.key.DeviceKeyAdminService;
+import org.onosproject.net.key.DeviceKeyId;
+import org.onosproject.net.key.DeviceKeyService;
+import org.onosproject.rest.AbstractWebResource;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.UriBuilder;
+import javax.ws.rs.core.UriInfo;
+import java.io.IOException;
+import java.io.InputStream;
+
+import static org.onlab.util.Tools.nullIsNotFound;
+
+/**
+ * Query and Manage Device Keys.
+ */
+@Path("keys")
+public class DeviceKeyWebResource extends AbstractWebResource {
+
+    @Context
+    UriInfo uriInfo;
+
+    private static final String DEVICE_KEY_NOT_FOUND = "Device key was not found";
+
+    /**
+     * Gets all device keys.
+     * Returns array of all device keys.
+     *
+     * @return 200 OK
+     * @onos.rsModel DeviceKeysGet
+     */
+    @GET
+    public Response getDeviceKeys() {
+        Iterable<DeviceKey> deviceKeys = get(DeviceKeyService.class).getDeviceKeys();
+        return ok(encodeArray(DeviceKey.class, "keys", deviceKeys)).build();
+    }
+
+    /**
+     * Get a single device key by device key unique identifier.
+     * Returns the specified device key.
+     *
+     * @param id device identifier
+     * @return 200 OK
+     * @onos.rsModel DeviceKeyGet
+     */
+    @GET
+    @Path("{id}")
+    public Response getDeviceKey(@PathParam("id") String id) {
+        DeviceKey deviceKey = nullIsNotFound(get(DeviceKeyService.class).getDeviceKey(DeviceKeyId.deviceKeyId(id)),
+                                             DEVICE_KEY_NOT_FOUND);
+        return ok(codec(DeviceKey.class).encode(deviceKey, this)).build();
+    }
+
+    /**
+     * Adds a new device key from the JSON request.
+     *
+     * @param stream input JSON
+     * @return status of the request - CREATED if the JSON is correct,
+     * BAD_REQUEST if the JSON is invalid
+     * @onos.rsModel IntentHost
+     */
+    @POST
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response addDeviceKey(InputStream stream) {
+        try {
+            DeviceKeyAdminService service = get(DeviceKeyAdminService.class);
+            ObjectNode root = (ObjectNode) mapper().readTree(stream);
+            DeviceKey deviceKey = codec(DeviceKey.class).decode(root, this);
+            service.addKey(deviceKey);
+
+            UriBuilder locationBuilder = uriInfo.getBaseUriBuilder()
+                    .path("keys")
+                    .path(deviceKey.deviceKeyId().id());
+
+            return Response
+                    .created(locationBuilder.build())
+                    .build();
+
+        } catch (IOException ioe) {
+            throw new IllegalArgumentException(ioe);
+        }
+    }
+
+    /**
+     * Removes a device key by device key identifier.
+     *
+     * @param id device identifier
+     * @return 200 OK
+     */
+    @DELETE
+    @Path("{id}")
+    public Response removeDeviceKey(@PathParam("id") String id) {
+        DeviceKey deviceKey = nullIsNotFound(get(DeviceKeyService.class).getDeviceKey(DeviceKeyId.deviceKeyId(id)),
+                                             DEVICE_KEY_NOT_FOUND);
+        get(DeviceKeyAdminService.class).removeKey(DeviceKeyId.deviceKeyId(id));
+        return ok(codec(DeviceKey.class).encode(deviceKey, this)).build();
+    }
+}