Fixing issues in GET /operations and /admin/devices APIs

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/DeviceManagementServiceImpl.java

@@ -326,8 +326,8 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             dms = DeviceMgtAPIUtils.getDeviceManagementService();
             operations = dms.getOperations(new DeviceIdentifier(id, type));
             if (operations == null) {
-                Response.status(Response.Status.NOT_FOUND).entity("It is likely that no device is found upon " +
-                        "the provided type and id");
+                return Response.status(Response.Status.NOT_FOUND).entity("It is likely that no device is found upon " +
+                        "the provided type and id").build();
             }
         } catch (OperationManagementException e) {
             String msg = "Error occurred while fetching the operations for the '" + type + "' device, which " +

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java

@@ -25,9 +25,11 @@ import org.wso2.carbon.context.CarbonContext;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.mgt.common.Device;
 import org.wso2.carbon.device.mgt.common.DeviceManagementException;
+import org.wso2.carbon.device.mgt.jaxrs.beans.DeviceList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.ErrorResponse;
 import org.wso2.carbon.device.mgt.jaxrs.service.api.admin.DeviceManagementAdminService;
 import org.wso2.carbon.device.mgt.jaxrs.service.impl.util.UnauthorizedAccessException;
+import org.wso2.carbon.device.mgt.jaxrs.service.impl.util.UnexpectedServerErrorException;
 import org.wso2.carbon.device.mgt.jaxrs.util.DeviceMgtAPIUtils;
 
 import javax.ws.rs.*;
@@ -67,11 +69,17 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
                 return Response.status(Response.Status.NOT_FOUND).entity("No device, which carries the name '" +
                         name + "', is currently enrolled in the system").build();
             }
-            return Response.status(Response.Status.OK).entity(devices).build();
+
+            DeviceList deviceList = new DeviceList();
+            deviceList.setCount(devices.size());
+            deviceList.setList(devices);
+
+            return Response.status(Response.Status.OK).entity(deviceList).build();
         } catch (DeviceManagementException e) {
-            String msg = "Error occurred while fetching the devices that carry the name '" + name + "'";
+            String msg = "Error occurred at server side while fetching device list.";
             log.error(msg, e);
-            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+            throw new UnexpectedServerErrorException(
+                    new ErrorResponse.ErrorResponseBuilder().setCode(500l).setMessage(msg).build());
         } finally {
             PrivilegedCarbonContext.endTenantFlow();
         }

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/webapp/META-INF/permissions.xml

@@ -394,6 +394,20 @@
         <method>GET</method>
     </Permission>
 
+    <Permission>
+        <name>View device</name>
+        <path>/device-mgt/admin/devices/view</path>
+        <url>/devices/*/*/operations</url>
+        <method>GET</method>
+    </Permission>
+
+    <Permission>
+        <name>View device</name>
+        <path>/device-mgt/user/devices/view</path>
+        <url>/devices/*/*/operations</url>
+        <method>GET</method>
+    </Permission>
+
     <!--<Permission>-->
         <!--<name>Get Applications For Device Type</name>-->
         <!--<path>/device-mgt/operations/application/view</path>-->