2 files changed, 21 insertions, 2 deletions
diff --git a/src/org/traccar/database/DataManager.java b/src/org/traccar/database/DataManager.java
index 530ec1779..c98a5ede7 100644
--- a/src/org/traccar/database/DataManager.java
+++ b/src/org/traccar/database/DataManager.java
@@ -31,6 +31,7 @@ import java.util.Map;
 import javax.naming.InitialContext;
 import javax.sql.DataSource;
 import org.traccar.Config;
+import org.traccar.helper.Clazz;
 import org.traccar.helper.DriverDelegate;
 import org.traccar.helper.Log;
 import org.traccar.model.Device;
@@ -385,6 +386,24 @@ public class DataManager implements IdentityManager {
                 .executeUpdate();
     }
 
+    public <T> Collection<T> get(Class<T> clazz) throws SQLException {
+        if (clazz.equals(User.class)) {
+            return (Collection<T>) getUsers();
+        } else if (clazz.equals(Device.class)) {
+            return (Collection<T>) getAllDevices();
+        }
+        return null;
+    }
+
+    public <T> T get(T entity) throws Exception {
+        if (entity instanceof User) {
+            return (T) getUser(Clazz.getId(entity));
+        } else if (entity instanceof Device) {
+            return (T) getDeviceById(Clazz.getId(entity));
+        }
+        return null;
+    }
+
     public void add(Object entity) throws SQLException {
         if (entity instanceof User) {
             addUser((User) entity);
diff --git a/src/org/traccar/database/PermissionsManager.java b/src/org/traccar/database/PermissionsManager.java
index 138641973..0a43f4ff4 100644
--- a/src/org/traccar/database/PermissionsManager.java
+++ b/src/org/traccar/database/PermissionsManager.java
@@ -67,7 +67,7 @@ public class PermissionsManager {
         }
     }
 
-    private void checkUser(long userId, long otherUserId) throws SecurityException {
+    public void checkUser(long userId, long otherUserId) throws SecurityException {
         if (userId != otherUserId) {
             checkAdmin(userId);
         }
@@ -77,7 +77,7 @@ public class PermissionsManager {
         return getNotNull(userId);
     }
 
-    private void checkDevice(long userId, long deviceId) throws SecurityException {
+    public void checkDevice(long userId, long deviceId) throws SecurityException {
         if (!getNotNull(userId).contains(deviceId)) {
             throw new SecurityException("Device access denied");
         }