adding swagger annotations for device and activity APIs.

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

@@ -28,6 +28,9 @@ import javax.ws.rs.*;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 
+/**
+ * Activity related REST-API implementation.
+ */
 @Path("/activities")
 @Produces(MediaType.APPLICATION_JSON)
 @Consumes(MediaType.APPLICATION_JSON)
@@ -40,12 +43,11 @@ public interface ActivityInfoProviderService {
             produces = MediaType.APPLICATION_JSON + ", " + MediaType.APPLICATION_XML,
             httpMethod = "POST",
             value = "Retrieving the operation details.",
-            notes = "This will return the operation details including the responses from the devices")
+            notes = "This will return the operation details including the responses from the devices.")
-    @ApiResponses(value = {@ApiResponse(code = 200, message = "Activity details provided successfully.."),
+    @ApiResponses(value = {@ApiResponse(code = 200, message = "Activity details provided successfully."),
             @ApiResponse(code = 500, message = "Error occurred while fetching the activity for the supplied id.")})
     @Permission(scope = "operation-view", permissions = {"/permission/admin/device-mgt/admin/devices/view"})
-    Response getActivity(
+    Response getActivity(@ApiParam(name = "id", value = "Activity id of the operation/activity to be retrieved",
-            @ApiParam(name = "id", value = "Provide activity id {id} as ACTIVITY_(number)",
                     required = true) @PathParam("id") String id);
 
 }

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

@@ -37,6 +37,9 @@ import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.util.List;
 
+/**
+ * Device related REST-API implementation. This can be used to manipulated device related details.
+ */
 @Path("/devices")
 @Produces(MediaType.APPLICATION_JSON)
 @Consumes(MediaType.APPLICATION_JSON)
@@ -46,99 +49,142 @@ public interface DeviceManagementService {
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "GET",
-            value = "Returns device list",
+            value = "Get the device list.",
-            notes = "Returns all devices enrolled with the system",
+            notes = "Returns all devices enrolled with the system.",
             response = org.wso2.carbon.device.mgt.common.Device.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "List of Devices"),
+            @ApiResponse(code = 200, message = "Successfully fetched the list of devices.", response = org.wso2.carbon
-            @ApiResponse(code = 500, message = "Error occurred while fetching the device list")
+                    .device.mgt.common.Device.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No device has currently been under the provided type."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the device list.")
     })
     @Permission(scope = "device-list", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDevices(@QueryParam("offset") int offset, @QueryParam("limit") int limit);
+    Response getDevices(
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit);
 
     @GET
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "GET",
-            value = "Returns device list",
+            value = "Get the device list corresponding to a device type.",
-            notes = "Returns all devices enrolled with the system",
+            notes = "Returns all devices enrolled with the system under the provided type.",
             response = org.wso2.carbon.device.mgt.common.Device.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "List of Devices"),
+            @ApiResponse(code = 200, message = "Successfully fetched the list of devices.", response = org.wso2.carbon
-            @ApiResponse(code = 500, message = "Error occurred while fetching the device list")
+                    .device.mgt.common.Device.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No device has currently been under the provided type."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the device list.")
     })
     @Permission(scope = "device-list", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDevices(@QueryParam("type") String type, @QueryParam("offset") int offset,
+    Response getDevices(
-                        @QueryParam("limit") int limit);
+            @ApiParam(name = "type", value = "The device type, such as ios, android or windows.", required = true)
+            @QueryParam ("type") String type,
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit);
 
     @POST
     @ApiOperation(
             consumes = MediaType.APPLICATION_JSON,
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "POST",
-            value = "Get devices information from the supplied device identifies",
+            value = "Get devices information from the supplied device identifies.",
             notes = "This will return device information such as CPU usage, memory usage etc for supplied device " +
                     "identifiers.",
             response = DeviceInfo.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = ""),
+            @ApiResponse(code = 200, message = "Successfully fetched device information.", response = DeviceInfo.class,
-            @ApiResponse(code = 400, message = ""),
+                    responseContainer = "List"),
-            @ApiResponse(code = 400, message = ""),
+            @ApiResponse(code = 404, message = "No device information is available for the device list submitted."),
-            @ApiResponse(code = 500, message = "Internal Server Error")
+            @ApiResponse(code = 500, message = "Error occurred while getting the device information.")
     })
     @Permission(scope = "device-info", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDevices(List<DeviceIdentifier> deviceIds);
+    Response getDevicesInfo(
+            @ApiParam(name = "deviceIds", value = "List of device identifiers",
+            required = true) List<DeviceIdentifier> deviceIds);
 
     @GET
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "GET",
-            value = "Returns device list",
+            value = "Get the device list of a user.",
-            notes = "Returns the set of devices that matches a given username",
+            notes = "Returns the set of devices that matches a given username.",
             response = org.wso2.carbon.device.mgt.common.Device.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "List of Devices"),
+            @ApiResponse(code = 200, message = "Successfully fetched the list of devices.", response = org.wso2.carbon
-            @ApiResponse(code = 500, message = "Error occurred while fetching the device list")
+                    .device.mgt.common.Device.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No device has currently been enrolled by the user."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the device list.")
     })
     @Permission(scope = "device-list", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDeviceByUsername(@QueryParam("user") String user, @QueryParam("offset") int offset,
+    Response getDeviceByUsername(
-                                 @QueryParam("limit") int limit);
+            @ApiParam(name = "user", value = "Username of owner of the devices.", required = true)
+            @QueryParam("user") String user,
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit);
 
     @GET
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "GET",
-            value = "Returns device list",
+            value = "Returns device list in a role.",
-            notes = "Returns the set of devices that matches a given role",
+            notes = "Returns the set of devices that matches a given role.",
             response = org.wso2.carbon.device.mgt.common.Device.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "List of Devices"),
+            @ApiResponse(code = 200, message = "Successfully fetched the list of devices.", response = org.wso2.carbon
-            @ApiResponse(code = 500, message = "Error occurred while fetching the device list")
+                    .device.mgt.common.Device.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No device has currently been enrolled under the role."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the device list.")
     })
     @Permission(scope = "device-list", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDevicesByRole(@QueryParam("roleName") String roleName, @QueryParam("offset") int offset,
+    Response getDevicesByRole(
-                              @QueryParam("limit") int limit);
+            @ApiParam(name = "roleName", value = "Role name of the devices to be fetched.", required = true)
+            @QueryParam("roleName") String roleName,
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit);
 
     @GET
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "GET",
-            value = "Returns device list",
+            value = "Returns device list of an ownership scheme.",
-            notes = "Returns the set of devices that matches a given ownership scheme",
+            notes = "Returns the set of devices that matches a given ownership scheme.",
             response = org.wso2.carbon.device.mgt.common.Device.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "List of Devices"),
+            @ApiResponse(code = 200, message = "Successfully fetched the list of devices.", response = org.wso2.carbon
-            @ApiResponse(code = 500, message = "Error occurred while fetching the device list")
+                    .device.mgt.common.Device.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No device has currently been enrolled under the given ownership " +
+                    "scheme."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the device list.")
     })
     @Permission(scope = "device-list", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDevicesByOwnership(@QueryParam("ownership") EnrolmentInfo.OwnerShip ownership,
+    Response getDevicesByOwnership(
-                                   @QueryParam("offset") int offset, @QueryParam("limit") int limit);
+            @ApiParam(name = "ownership", value = "Ownership of the devices to be fetched registered under.",
+                    required = true)
+            @QueryParam("ownership") EnrolmentInfo.OwnerShip ownership,
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit);
 
     @GET
     @ApiOperation(
@@ -149,12 +195,20 @@ public interface DeviceManagementService {
             response = org.wso2.carbon.device.mgt.common.Device.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "List of Devices"),
+            @ApiResponse(code = 200, message = "Successfully fetched the list of devices.",
-            @ApiResponse(code = 500, message = "Error occurred while fetching the device list")
+                    response = org.wso2.carbon.device.mgt.common.Device.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No device is currently in the given enrollment status."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the device list.")
     })
     @Permission(scope = "device-list", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDevicesByEnrollmentStatus(@QueryParam("status") EnrolmentInfo.Status status,
+    Response getDevicesByEnrollmentStatus(
-                                          @QueryParam("offset") int offset, @QueryParam("limit") int limit);
+            @ApiParam(name = "status", value = "Enrollment status of devices to be fetched.", required = true)
+            @QueryParam("status") EnrolmentInfo.Status status,
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit);
 
     @GET
     @Permission(scope = "device-view", permissions = {
@@ -167,18 +221,22 @@ public interface DeviceManagementService {
     @ApiOperation(
             produces = MediaType.APPLICATION_JSON,
             httpMethod = "GET",
-            value = "Get the device location",
+            value = "Get the device location of a given device and a device type.",
             notes = "This will return the device location including latitude and longitude as well the "
-                    + "physical address",
+                    + "physical address.",
             response = DeviceLocation.class)
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = ""),
+            @ApiResponse(code = 200, message = "Successfully fetched the device location.",
-            @ApiResponse(code = 400, message = ""),
+                    response = DeviceLocation.class),
-            @ApiResponse(code = 400, message = ""),
+            @ApiResponse(code = 404, message = "Location details are not available for the given device."),
-            @ApiResponse(code = 500, message = "Internal Server Error")
+            @ApiResponse(code = 500, message = "Error occurred while getting the device location.")
     })
     @Permission(scope = "device-info", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response getDeviceLocation(@PathParam("type") String type, @PathParam("id") String id);
+    Response getDeviceLocation(
+            @ApiParam(name = "type", value = "The device type, such as ios, android or windows.", required = true)
+            @PathParam("type") String type,
+            @ApiParam(name = "type", value = "The device identifier of the device.", required = true)
+            @PathParam("id") String id);
 
     @GET
     @Path("/{type}/{id}/features")
@@ -192,12 +250,17 @@ public interface DeviceManagementService {
                     " such as iOS, Android or Windows.",
             response = org.wso2.carbon.device.mgt.common.Feature.class,
             responseContainer = "List")
-    @ApiResponses(value = { @ApiResponse(code = 200, message = "List of Features"),
+    @ApiResponses(value = {
-            @ApiResponse(code = 500, message = "Error occurred while retrieving the list of features" +
+            @ApiResponse(code = 200, message = "Successfully fetched the features.",
-                    ".") })
+                    response = org.wso2.carbon.device.mgt.common.Feature.class, responseContainer = "List"),
+            @ApiResponse(code = 500, message = "Error occurred while retrieving the list of features.") })
     @Permission(scope = "device-search", permissions = {"/permission/admin/device-mgt/admin/devices/view",
             "/permission/admin/device-mgt/user/devices/view"})
-    Response getFeaturesOfDevice(@PathParam("type") String type, @PathParam("id") String id);
+    Response getFeaturesOfDevice(
+            @ApiParam(name = "type", value = "The device type, such as ios, android or windows.", required = true)
+            @PathParam("type") String type,
+            @ApiParam(name = "type", value = "The device identifier of the device.", required = true)
+            @PathParam("id") String id);
 
     @POST
     @Path("/search-devices")
@@ -205,16 +268,18 @@ public interface DeviceManagementService {
             produces = MediaType.APPLICATION_JSON,
             consumes = MediaType.APPLICATION_JSON,
             httpMethod = "POST",
-            value = "Advanced Search for Devices via the Console",
+            value = "Advanced search for devices.",
-            notes = "Carry out an advanced search via the EMM console",
+            notes = "Carry out an advanced search of devices.",
             response = DeviceWrapper.class,
             responseContainer = "List")
     @ApiResponses(value = {
-            @ApiResponse(code = 200, message = "OK", response = DeviceWrapper.class, responseContainer = "List"),
+            @ApiResponse(code = 200, message = "Successfully fetched matching devices.", response = DeviceWrapper.class,
-            @ApiResponse(code = 500, message = "Error occurred while searching the device information")
+                    responseContainer = "List"),
+            @ApiResponse(code = 500, message = "Error occurred while searching the device information.")
     })
     @Permission(scope = "device-search", permissions = {"/permission/admin/device-mgt/admin/devices/list"})
-    Response searchDevices(@ApiParam(name = "filtering rules", value = "List of search conditions",
+    Response searchDevices(
+            @ApiParam(name = "searchContext", value = "List of search conditions.",
             required = true) SearchContext searchContext);
 
     @GET
@@ -223,21 +288,23 @@ public interface DeviceManagementService {
             consumes = MediaType.APPLICATION_JSON + ", " + MediaType.APPLICATION_XML,
             produces = MediaType.APPLICATION_JSON + ", " + MediaType.APPLICATION_XML,
             httpMethod = "GET",
-            value = "Getting Installed Application Details of a Device.",
+            value = "Getting installed application details of a device.",
             responseContainer = "List",
             notes = "Get the list of applications that a device has subscribed.",
             response = Application.class)
-    @ApiResponses(value = {@ApiResponse(code = 200, message = "List of installed application details of a device.", response = Application.class, responseContainer = "List"),
+    @ApiResponses(value = {
-            @ApiResponse(code = 500, message = "Error occurred while fetching the apps of the device" +
+            @ApiResponse(code = 200, message = "List of installed application details of a device.",
-                    ".")})
+            response = Application.class, responseContainer = "List"),
+            @ApiResponse(code = 404, message = "No installed applications found on the device searched."),
+            @ApiResponse(code = 500, message = "Error occurred while fetching the apps of the device.")})
     @Permission(scope = "operation-view", permissions = {
             "/permission/admin/device-mgt/admin/devices/view",
             "/permission/admin/device-mgt/user/devices/view"})
     Response getInstalledApplications(
-            @ApiParam(name = "type", value = "Define the device type as the value for {type}. " +
+            @ApiParam(name = "type", value = "The device type, such as ios, android or windows.", required = true)
-            "Example: ios, android or windows.", required = true)
+            @PathParam("type") String type,
-            @PathParam("type") String type, @ApiParam(name = "id", value = "Define the device ID",
+            @ApiParam(name = "type", value = "The device identifier of the device.", required = true)
-            required = true) @PathParam("id") String id);
+            @PathParam("id") String id);
 
 
     @GET
@@ -246,21 +313,29 @@ public interface DeviceManagementService {
             consumes = MediaType.APPLICATION_JSON + ", " + MediaType.APPLICATION_XML,
             produces = MediaType.APPLICATION_JSON + ", " + MediaType.APPLICATION_XML,
             httpMethod = "GET",
-            value = "Getting Paginated Details for Operations on a Device.",
+            value = "Getting paginated details for operations on a device.",
             notes = "You will carry out many operations on a device. In a situation where you wish to view the all" +
                     " the operations carried out on a device it is not feasible to show all the details on one page" +
-                    " therefore the details are paginated." +
+                    " therefore the details are paginated.",
-                    " Example: You carry out 21 operations via a given device. When you wish to see the operations " +
-                    "carried out, the details of the 21 operations will be broken down into 3 pages with 10 operation" +
-                    " details per page.",
             response = org.wso2.carbon.device.mgt.common.operation.mgt.Operation.class)
-    @ApiResponses(value = {@ApiResponse(code = 200, message = "List of Operations on a device."),
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = "List of Operations on a device.",
+                    response = org.wso2.carbon.device.mgt.common.operation.mgt.Operation.class,
+                    responseContainer = "List"),
             @ApiResponse(code = 500, message = "Error occurred while fetching the operations for the " +
                     "device.")})
     @Permission(scope = "operation-view", permissions = {
             "/permission/admin/device-mgt/admin/devices/view",
             "/permission/admin/device-mgt/user/devices/view"})
-    Response getDeviceOperations(@QueryParam("offset") int offset, @QueryParam("limit") int limit,
+    Response getDeviceOperations(
-                                 @PathParam("type") String type, @PathParam("id") String id);
+            @ApiParam(name = "offset", value = "Starting pagination index.",required = true)
+            @QueryParam("offset") int offset,
+            @ApiParam(name = "limit", value = "How many device details are required from the starting pagination " +
+                    "index.", required = true)
+            @QueryParam("limit") int limit,
+            @ApiParam(name = "type", value = "The device type, such as ios, android or windows.", required = true)
+            @PathParam("type") String type,
+            @ApiParam(name = "type", value = "The device identifier of the device.", required = true)
+            @PathParam("id") String id);
 
 }

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

@@ -18,7 +18,6 @@
  */
 package org.wso2.carbon.device.mgt.jaxrs.service.impl;
 
-import io.swagger.annotations.ApiParam;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.common.operation.mgt.Operation;
@@ -27,6 +26,7 @@ import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
 import org.wso2.carbon.device.mgt.jaxrs.service.api.ActivityInfoProviderService;
 import org.wso2.carbon.device.mgt.jaxrs.util.DeviceMgtAPIUtils;
 
+import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.core.Response;
 
@@ -35,8 +35,8 @@ public class ActivityProviderServiceImpl implements ActivityInfoProviderService
     private static final Log log = LogFactory.getLog(ActivityProviderServiceImpl.class);
 
     @Override
-    public Response getActivity(@ApiParam(name = "id", value = "Provide activity id {id} as ACTIVITY_(number)",
+    @Path("/{id}")
-            required = true) @PathParam("id") String id) {
+    public Response getActivity(@PathParam("id") String id) {
         Operation operation = null;
         DeviceManagementProviderService dmService;
         try {

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

@@ -23,6 +23,7 @@ import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.common.*;
 import org.wso2.carbon.device.mgt.common.app.mgt.Application;
 import org.wso2.carbon.device.mgt.common.app.mgt.ApplicationManagementException;
+import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocation;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceWrapper;
 import org.wso2.carbon.device.mgt.common.operation.mgt.Operation;
@@ -90,8 +91,22 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
 
     @POST
     @Override
-    public Response getDevices(List<DeviceIdentifier> deviceIds) {
+    public Response getDevicesInfo(List<DeviceIdentifier> deviceIds) {
-        return null;
+        DeviceInformationManager informationManager;
+        List<DeviceInfo> deviceInfo;
+        try {
+            informationManager = DeviceMgtAPIUtils.getDeviceInformationManagerService();
+            deviceInfo = informationManager.getDevicesInfo(deviceIds);
+            if (deviceInfo == null) {
+                return Response.status(Response.Status.NOT_FOUND).entity("No device information is available for the " +
+                        "device list submitted").build();
+            }
+        } catch (DeviceDetailsMgtException e) {
+            String msg = "Error occurred while getting the device information.";
+            log.error(msg, e);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+        }
+        return Response.status(Response.Status.OK).entity(deviceInfo).build();
     }
 
     @GET
@@ -206,6 +221,11 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
         try {
             informationManager = DeviceMgtAPIUtils.getDeviceInformationManagerService();
             deviceLocation = informationManager.getDeviceLocation(new DeviceIdentifier(id, type));
+            if (deviceLocation == null || deviceLocation.getLatitude() == null ||
+                    deviceLocation.getLongitude() == null) {
+                return Response.status(Response.Status.NOT_FOUND).entity("Location details are not available for the " +
+                        "given device id '" + id + "'").build();
+            }
         } catch (DeviceDetailsMgtException e) {
             String msg = "Error occurred while getting the last updated location of the '" + type + "' device, " +
                     "which carries the id '" + id + "'";
@@ -267,6 +287,10 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
         try {
             amc = DeviceMgtAPIUtils.getAppManagementService();
             applications = amc.getApplicationListForDevice(new DeviceIdentifier(id, type));
+            if (applications == null || applications.size() == 0) {
+                return Response.status(Response.Status.NOT_FOUND).entity("No installed applications found on the " +
+                        "device searched").build();
+            }
         } catch (ApplicationManagementException e) {
             String msg = "Error occurred while fetching the apps of the '" + type + "' device, which carries " +
                     "the id '" + id + "'";