Add backend implementation to get devices not in a group

Purpose:
https://roadmap.entgra.net/issues/11349
Co-authored-by: Nipuni Kavindya <nipuni@entgra.io>
Co-committed-by: Nipuni Kavindya <nipuni@entgra.io>

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/api/DeviceManagementService.java

@@ -310,6 +310,12 @@ public interface DeviceManagementService {
                     required = false)
             @QueryParam("groupId")
                     int groupId,
+            @ApiParam(
+                    name = "excludeGroupId",
+                    value = "Id of the group that needs to get the devices that are not belong.",
+                    required = false)
+            @QueryParam("excludeGroupId")
+                    int excludeGroupId,
             @ApiParam(
                     name = "since",
                     value = "Checks if the requested variant was created since the specified date-time.\n" +

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/DeviceManagementServiceImpl.java

@@ -147,6 +147,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             @QueryParam("customProperty") String customProperty,
             @QueryParam("status") List<String> status,
             @QueryParam("groupId") int groupId,
+            @QueryParam("excludeGroupId") int excludeGroupId,
             @QueryParam("since") String since,
             @HeaderParam("If-Modified-Since") String ifModifiedSince,
             @QueryParam("requireDeviceInfo") boolean requireDeviceInfo,
@@ -209,7 +210,22 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
                     request.setStatusList(status);
                 }
             }
-            // this is the user who initiates the request
+
+            if (excludeGroupId != 0) {
+                request.setGroupId(excludeGroupId);
+
+                if (user != null && !user.isEmpty()) {
+                    request.setOwner(MultitenantUtils.getTenantAwareUsername(user));
+                } else if (userPattern != null && !userPattern.isEmpty()) {
+                    request.setOwnerPattern(userPattern);
+                }
+
+                result = dms.getDevicesNotInGroup(request, requireDeviceInfo);
+                devices.setList((List<Device>) result.getData());
+                devices.setCount(result.getRecordsTotal());
+                return Response.status(Response.Status.OK).entity(devices).build();
+            }
+
             String authorizedUser = CarbonContext.getThreadLocalCarbonContext().getUsername();
 
             if (groupId != 0) {

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/test/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/DeviceManagementServiceImplTest.java

@@ -157,7 +157,7 @@ public class DeviceManagementServiceImplTest {
                 .toReturn(this.deviceAccessAuthorizationService);
         Response response = this.deviceManagementService
                 .getDevices(TEST_DEVICE_NAME, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 1, null, null, false,
+                        null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.BAD_REQUEST.getStatusCode());
     }
@@ -177,22 +177,22 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null,null, DEFAULT_STATUS_LIST, 1, null, null, false,
+                        null,null, DEFAULT_STATUS_LIST, 1, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(TEST_DEVICE_NAME, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, null, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 1, null, null, false,
+                        null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(TEST_DEVICE_NAME, TEST_DEVICE_TYPE, null, null, null, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 1, null, null, false,
+                        null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(TEST_DEVICE_NAME, TEST_DEVICE_TYPE, null, null, null, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 1, null, null, true,
+                        null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, true,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
     }
@@ -307,7 +307,7 @@ public class DeviceManagementServiceImplTest {
         Mockito.when(deviceAccessAuthorizationService.isDeviceAdminUser()).thenReturn(true);
         deviceManagementService.getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null,
                                            DEFAULT_ROLE, DEFAULT_OWNERSHIP, null,null, DEFAULT_STATUS_LIST, 1,
-                                           null, null, false, 10, 5);
+                                           0, null, null, false, 10, 5);
     }
 
     @Test(description = "Testing get devices when user is the device admin")
@@ -326,11 +326,11 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP
-                        , null, null, DEFAULT_STATUS_LIST, 1, null, null, false, 10, 5);
+                        , null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false, 10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, null, DEFAULT_USERNAME, DEFAULT_ROLE, DEFAULT_OWNERSHIP
-                        , null, null, DEFAULT_STATUS_LIST, 1, null, null, false, 10, 5);
+                        , null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false, 10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
     }
 
@@ -352,7 +352,7 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, "newuser", null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 0, null, null, false,
+                        null, null, DEFAULT_STATUS_LIST, 0, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.UNAUTHORIZED.getStatusCode());
         Mockito.reset(this.deviceAccessAuthorizationService);
@@ -374,17 +374,17 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 0, null, ifModifiedSince, false,
+                        null, null, DEFAULT_STATUS_LIST, 0, 0, null, ifModifiedSince, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.NOT_MODIFIED.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 0, null, ifModifiedSince, true,
+                        null, null, DEFAULT_STATUS_LIST, 0, 0, null, ifModifiedSince, true,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.NOT_MODIFIED.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 0, null, "ErrorModifiedSince",
+                        null, null, DEFAULT_STATUS_LIST, 0, 0, null, "ErrorModifiedSince",
                         false, 10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.BAD_REQUEST.getStatusCode());
     }
@@ -405,17 +405,17 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null,DEFAULT_STATUS_LIST, 0, since, null, false,
+                        null, null,DEFAULT_STATUS_LIST, 0, 0, since, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null,DEFAULT_STATUS_LIST, 0, since, null, true,
+                        null, null,DEFAULT_STATUS_LIST, 0, 0, since, null, true,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.OK.getStatusCode());
         response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null,DEFAULT_STATUS_LIST, 0, "ErrorSince", null, false,
+                        null, null,DEFAULT_STATUS_LIST, 0, 0, "ErrorSince", null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.BAD_REQUEST.getStatusCode());
     }
@@ -438,7 +438,7 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 1, null, null, false,
+                        null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.INTERNAL_SERVER_ERROR.getStatusCode());
         Mockito.reset(this.deviceManagementProviderService);
@@ -461,7 +461,7 @@ public class DeviceManagementServiceImplTest {
 
         Response response = this.deviceManagementService
                 .getDevices(null, TEST_DEVICE_TYPE, DEFAULT_USERNAME, null, DEFAULT_ROLE, DEFAULT_OWNERSHIP,
-                        null, null, DEFAULT_STATUS_LIST, 1, null, null, false,
+                        null, null, DEFAULT_STATUS_LIST, 1, 0, null, null, false,
                         10, 5);
         Assert.assertEquals(response.getStatus(), Response.Status.INTERNAL_SERVER_ERROR.getStatusCode());
         Mockito.reset(this.deviceAccessAuthorizationService);

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/DeviceDAO.java

@@ -844,4 +844,24 @@ public interface DeviceDAO {
     List<String> getAgentVersions(int tenantId) throws DeviceManagementDAOException;
     List<Device> getDevicesEnrolledSince(Date since) throws DeviceManagementDAOException;
     List<Device> getDevicesEnrolledPriorTo(Date priorTo) throws DeviceManagementDAOException;
+
+    /**
+     * This method is used to search for devices that are not in a specific group.
+     *
+     * @param request  PaginationRequest object holding the data for pagination
+     * @param tenantId tenant id.
+     * @return returns paginated list of devices.
+     * @throws DeviceManagementDAOException
+     */
+    List<Device> searchDevicesNotInGroup(PaginationRequest request, int tenantId) throws DeviceManagementDAOException;
+
+    /**
+     * This method is used to get device count that are not within a specific group.
+     *
+     * @param request PaginationRequest object holding the data for pagination
+     * @param tenantId tenant id
+     * @return Device count
+     * @throws DeviceManagementDAOException
+     */
+    int getCountOfDevicesNotInGroup(PaginationRequest request, int tenantId) throws DeviceManagementDAOException;
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java

@@ -3190,4 +3190,112 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
     public abstract void refactorDeviceStatus (Connection conn, List<Device> validDevices)
             throws DeviceManagementDAOException;
 
+    @Override
+    public int getCountOfDevicesNotInGroup(PaginationRequest request, int tenantId) throws DeviceManagementDAOException {
+        int deviceCount = 0;
+        int groupId = request.getGroupId();
+        String deviceType = request.getDeviceType();
+        boolean isDeviceTypeProvided = false;
+        String deviceName = request.getDeviceName();
+        boolean isDeviceNameProvided = false;
+        String owner = request.getOwner();
+        boolean isOwnerProvided = false;
+        String ownerPattern = request.getOwnerPattern();
+        boolean isOwnerPatternProvided = false;
+        String ownership = request.getOwnership();
+        boolean isOwnershipProvided = false;
+        List<String> statusList = request.getStatusList();
+        boolean isStatusProvided = false;
+        Date since = request.getSince();
+        boolean isSinceProvided = false;
+
+        try {
+            Connection conn = getConnection();
+            String sql = "SELECT COUNT(d1.DEVICE_ID) AS DEVICE_COUNT " +
+                    "FROM DM_ENROLMENT e, " +
+                    "(SELECT gd.ID AS DEVICE_ID, " +
+                    "gd.DESCRIPTION, " +
+                    "gd.NAME, " +
+                    "gd.DEVICE_IDENTIFICATION " +
+                    "FROM DM_DEVICE gd " +
+                    "WHERE gd.ID NOT IN (SELECT dgm.DEVICE_ID " +
+                    "FROM DM_DEVICE_GROUP_MAP dgm " +
+                    "WHERE dgm.GROUP_ID = ?) " +
+                    "AND gd.TENANT_ID = ?";
+
+            if (deviceName != null && !deviceName.isEmpty()) {
+                sql += " AND gd.NAME LIKE ?";
+                isDeviceNameProvided = true;
+            }
+            sql += " AND 1=1";
+
+            if (since != null) {
+                sql += " AND gd.LAST_UPDATED_TIMESTAMP > ?";
+                isSinceProvided = true;
+            }
+            sql += " ) d1 WHERE d1.DEVICE_ID = e.DEVICE_ID AND e.TENANT_ID = ?";
+
+            if (deviceType != null && !deviceType.isEmpty()) {
+                sql += " AND e.DEVICE_TYPE = ?";
+                isDeviceTypeProvided = true;
+            }
+
+            if (ownership != null && !ownership.isEmpty()) {
+                sql += " AND e.OWNERSHIP = ?";
+                isOwnershipProvided = true;
+            }
+
+            if (owner != null && !owner.isEmpty()) {
+                sql += " AND e.OWNER = ?";
+                isOwnerProvided = true;
+            } else if (ownerPattern != null && !ownerPattern.isEmpty()) {
+                sql += " AND e.OWNER LIKE ?";
+                isOwnerPatternProvided = true;
+            }
+            if (statusList != null && !statusList.isEmpty()) {
+                sql += buildStatusQuery(statusList);
+                isStatusProvided = true;
+            }
+
+            try (PreparedStatement stmt = conn.prepareStatement(sql)) {
+                int paramIdx = 1;
+                stmt.setInt(paramIdx++, groupId);
+                stmt.setInt(paramIdx++, tenantId);
+                if (isDeviceNameProvided) {
+                    stmt.setString(paramIdx++, "%" + deviceName + "%");
+                }
+                if (isSinceProvided) {
+                    stmt.setTimestamp(paramIdx++, new Timestamp(since.getTime()));
+                }
+                stmt.setInt(paramIdx++, tenantId);
+                if (isDeviceTypeProvided) {
+                    stmt.setString(paramIdx++, deviceType);
+                }
+                if (isOwnershipProvided) {
+                    stmt.setString(paramIdx++, ownership);
+                }
+                if (isOwnerProvided) {
+                    stmt.setString(paramIdx++, owner);
+                } else if (isOwnerPatternProvided) {
+                    stmt.setString(paramIdx++, ownerPattern + "%");
+                }
+                if (isStatusProvided) {
+                    for (String status : statusList) {
+                        stmt.setString(paramIdx++, status);
+                    }
+                }
+
+                try (ResultSet rs = stmt.executeQuery()) {
+                    if (rs.next()) {
+                        deviceCount = rs.getInt("DEVICE_COUNT");
+                    }
+                    return deviceCount;
+                }
+            }
+        } catch (SQLException e) {
+            String msg = "Error occurred while retrieving count of devices not in group: " + groupId;
+            log.error(msg, e);
+            throw new DeviceManagementDAOException(msg, e);
+        }
+    }
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java

@@ -724,7 +724,7 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
             }
             //Add the query for owner
             if (owner != null && !owner.isEmpty()) {
-                sql = sql + " AND e.OWNER = ?";
+                sql = sql + " AND e.OWNER LIKE ?";
                 isOwnerProvided = true;
             } else if (ownerPattern != null && !ownerPattern.isEmpty()) {
                 sql = sql + " AND e.OWNER LIKE ?";
@@ -776,7 +776,7 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
                     stmt.setString(paramIdx++, ownership);
                 }
                 if (isOwnerProvided) {
-                    stmt.setString(paramIdx++, owner);
+                    stmt.setString(paramIdx++, "%" + owner + "%");
                 } else if (isOwnerPatternProvided) {
                     stmt.setString(paramIdx++, ownerPattern + "%");
                 }
@@ -1689,4 +1689,172 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<Device> searchDevicesNotInGroup(PaginationRequest request, int tenantId) throws DeviceManagementDAOException {
+        List<Device> devices = null;
+        int groupId = request.getGroupId();
+        String deviceType = request.getDeviceType();
+        boolean isDeviceTypeProvided = false;
+        String deviceName = request.getDeviceName();
+        boolean isDeviceNameProvided = false;
+        String owner = request.getOwner();
+        boolean isOwnerProvided = false;
+        String ownerPattern = request.getOwnerPattern();
+        boolean isOwnerPatternProvided = false;
+        String ownership = request.getOwnership();
+        boolean isOwnershipProvided = false;
+        List<String> statusList = request.getStatusList();
+        boolean isStatusProvided = false;
+        Date since = request.getSince();
+        boolean isSinceProvided = false;
+        String serial = request.getSerialNumber();
+        boolean isSerialProvided = false;
+
+        try {
+            Connection conn = getConnection();
+            String sql = "SELECT d1.DEVICE_ID, " +
+                    "d1.DESCRIPTION, " +
+                    "d1.NAME AS DEVICE_NAME, " +
+                    "e.DEVICE_TYPE, " +
+                    "d1.DEVICE_IDENTIFICATION, " +
+                    "d1.LAST_UPDATED_TIMESTAMP, " +
+                    "e.OWNER, " +
+                    "e.OWNERSHIP, " +
+                    "e.STATUS, " +
+                    "e.IS_TRANSFERRED, " +
+                    "e.DATE_OF_LAST_UPDATE, " +
+                    "e.DATE_OF_ENROLMENT, " +
+                    "e.ID AS ENROLMENT_ID " +
+                    "FROM DM_ENROLMENT e, " +
+                    "(SELECT gd.DEVICE_ID, " +
+                    "gd.DESCRIPTION, " +
+                    "gd.NAME, " +
+                    "gd.DEVICE_IDENTIFICATION, " +
+                    "gd.LAST_UPDATED_TIMESTAMP " +
+                    "FROM " +
+                    "(SELECT d.ID AS DEVICE_ID, " +
+                    "d.DESCRIPTION,  " +
+                    "d.NAME, " +
+                    "d.DEVICE_IDENTIFICATION, " +
+                    "d.LAST_UPDATED_TIMESTAMP " +
+                    "FROM DM_DEVICE d " +
+                    "WHERE d.ID NOT IN " +
+                    "(SELECT dgm.DEVICE_ID " +
+                    "FROM DM_DEVICE_GROUP_MAP dgm " +
+                    "WHERE  dgm.GROUP_ID = ?) " +
+                    "AND d.TENANT_ID = ?";
+
+            if (deviceName != null && !deviceName.isEmpty()) {
+                sql = sql + " AND d.NAME LIKE ?";
+                isDeviceNameProvided = true;
+            }
+            sql = sql + ") gd";
+            sql = sql + " WHERE 1 = 1";
+
+            if (since != null) {
+                sql = sql + " AND gd.LAST_UPDATED_TIMESTAMP > ?";
+                isSinceProvided = true;
+            }
+            sql = sql + " ) d1 WHERE d1.DEVICE_ID = e.DEVICE_ID AND e.TENANT_ID = ? ";
+
+            if (deviceType != null && !deviceType.isEmpty()) {
+                sql = sql + " AND e.DEVICE_TYPE = ?";
+                isDeviceTypeProvided = true;
+            }
+
+            if (ownership != null && !ownership.isEmpty()) {
+                sql = sql + " AND e.OWNERSHIP = ?";
+                isOwnershipProvided = true;
+            }
+
+            if (owner != null && !owner.isEmpty()) {
+                sql = sql + " AND e.OWNER LIKE ?";
+                isOwnerProvided = true;
+            } else if (ownerPattern != null && !ownerPattern.isEmpty()) {
+                sql = sql + " AND e.OWNER LIKE ?";
+                isOwnerPatternProvided = true;
+            }
+            if (statusList != null && !statusList.isEmpty()) {
+                sql += buildStatusQuery(statusList);
+                isStatusProvided = true;
+            }
+
+            if (serial != null || !request.getCustomProperty().isEmpty()) {
+                if (serial != null) {
+                    sql += "AND EXISTS (" +
+                            "SELECT VALUE_FIELD " +
+                            "FROM DM_DEVICE_INFO di " +
+                            "WHERE di.DEVICE_ID = d1.DEVICE_ID " +
+                            "AND di.KEY_FIELD = 'serial' " +
+                            "AND di.VALUE_FIELD LIKE ?) ";
+                    isSerialProvided = true;
+                }
+                if (!request.getCustomProperty().isEmpty()) {
+                    for (Map.Entry<String, String> entry : request.getCustomProperty().entrySet()) {
+                        sql += "AND EXISTS (" +
+                                "SELECT VALUE_FIELD " +
+                                "FROM DM_DEVICE_INFO di2 " +
+                                "WHERE di2.DEVICE_ID = d1.DEVICE_ID " +
+                                "AND di2.KEY_FIELD = '" + entry.getKey() + "' " +
+                                "AND di2.VALUE_FIELD LIKE ?)";
+                    }
+                }
+            }
+            sql = sql + " LIMIT ? OFFSET ?";
+
+            try (PreparedStatement stmt = conn.prepareStatement(sql)) {
+                int paramIdx = 1;
+                stmt.setInt(paramIdx++, groupId);
+                stmt.setInt(paramIdx++, tenantId);
+                if (isDeviceNameProvided) {
+                    stmt.setString(paramIdx++, "%" + deviceName + "%");
+                }
+                if (isSinceProvided) {
+                    stmt.setTimestamp(paramIdx++, new Timestamp(since.getTime()));
+                }
+                stmt.setInt(paramIdx++, tenantId);
+                if (isDeviceTypeProvided) {
+                    stmt.setString(paramIdx++, deviceType);
+                }
+                if (isOwnershipProvided) {
+                    stmt.setString(paramIdx++, ownership);
+                }
+                if (isOwnerProvided) {
+                    stmt.setString(paramIdx++, "%" + owner + "%");
+                } else if (isOwnerPatternProvided) {
+                    stmt.setString(paramIdx++, "%" + ownerPattern + "%");
+                }
+                if (isStatusProvided) {
+                    for (String status : statusList) {
+                        stmt.setString(paramIdx++, status);
+                    }
+                }
+                if (isSerialProvided) {
+                    stmt.setString(paramIdx++, "%" + serial + "%");
+                }
+                if (!request.getCustomProperty().isEmpty()) {
+                    for (Map.Entry<String, String> entry : request.getCustomProperty().entrySet()) {
+                        stmt.setString(paramIdx++, "%" + entry.getValue() + "%");
+                    }
+                }
+                stmt.setInt(paramIdx++, request.getRowCount());
+                stmt.setInt(paramIdx, request.getStartIndex());
+
+                try (ResultSet rs = stmt.executeQuery()) {
+                    devices = new ArrayList<>();
+                    while (rs.next()) {
+                        Device device = DeviceManagementDAOUtil.loadDevice(rs);
+                        devices.add(device);
+                    }
+                    return devices;
+                }
+            }
+        } catch (SQLException e) {
+            String msg = "Error occurred while retrieving information of" +
+                    " devices not belonging to group : " + groupId;
+            log.error(msg, e);
+            throw new DeviceManagementDAOException(msg, e);
+        }
+    }
+
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/DeviceManagementProviderService.java

@@ -1111,4 +1111,18 @@ public interface DeviceManagementProviderService {
      * @throws OperationManagementException if an error occurs while fetching the operation details.
      */
     OperationDTO getOperationDetailsById(int operationId) throws OperationManagementException;
+
+
+    /**
+     * Method to retrieve all the devices that are not in a group with pagination support.
+     *
+     * @param request PaginationRequest object holding the data for pagination
+     * @param requireDeviceInfo - A boolean indicating whether the device-info (location, app-info etc) is also required
+     *                          along with the device data.
+     * @return PaginationResult - Result including the required parameters necessary to do pagination.
+     * @throws DeviceManagementException If some unusual behaviour is observed while fetching the
+     *                                   devices.
+     */
+    PaginationResult getDevicesNotInGroup(PaginationRequest request, boolean requireDeviceInfo)
+            throws DeviceManagementException;
 }

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/DeviceManagementProviderServiceImpl.java

@@ -5449,4 +5449,58 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         return operationDetails;
     }
 
+    @Override
+    public PaginationResult getDevicesNotInGroup(PaginationRequest request, boolean requireDeviceInfo)
+            throws DeviceManagementException {
+        if (request == null) {
+            String msg = "Received incomplete pagination request for method getDevicesNotInGroup";
+            log.error(msg);
+            throw new DeviceManagementException(msg);
+        }
+        if (log.isDebugEnabled()) {
+            log.debug("Get devices not in group with pagination " + request.toString() +
+                    " and requiredDeviceInfo: " + requireDeviceInfo);
+        }
+        PaginationResult paginationResult = new PaginationResult();
+        List<Device> devicesNotInGroup = null;
+        int count = 0;
+        int tenantId = this.getTenantId();
+        DeviceManagerUtil.validateDeviceListPageSize(request);
+
+        try {
+            DeviceManagementDAOFactory.openConnection();
+            if (request.getGroupId() != 0) {
+                devicesNotInGroup = deviceDAO.searchDevicesNotInGroup(request, tenantId);
+                count = deviceDAO.getCountOfDevicesNotInGroup(request, tenantId);
+            } else {
+                String msg = "Group ID is not provided for method getDevicesNotInGroup";
+                log.error(msg);
+                throw new DeviceManagementException(msg);
+            }
+        } catch (DeviceManagementDAOException e) {
+            String msg = "Error occurred while retrieving device list that are not in the specified group for the current tenant";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } catch (SQLException e) {
+            String msg = "Error occurred while opening a connection to the data source";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } catch (Exception e) {
+            String msg = "Error occurred in getDevicesNotInGroup";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } finally {
+            DeviceManagementDAOFactory.closeConnection();
+        }
+
+        if (requireDeviceInfo && devicesNotInGroup != null && !devicesNotInGroup.isEmpty()) {
+            paginationResult.setData(populateAllDeviceInfo(devicesNotInGroup));
+        } else {
+            paginationResult.setData(devicesNotInGroup);
+        }
+
+        paginationResult.setRecordsFiltered(count);
+        paginationResult.setRecordsTotal(count);
+        return paginationResult;
+    }
 }