2 files changed, 54 insertions, 3 deletions
diff --git a/src/main/java/org/traccar/config/Keys.java b/src/main/java/org/traccar/config/Keys.java
index 52f1894cd..5f8b36c6d 100644
--- a/src/main/java/org/traccar/config/Keys.java
+++ b/src/main/java/org/traccar/config/Keys.java
@@ -19,6 +19,9 @@ import java.util.Collections;
 
 public final class Keys {
 
+    private Keys() {
+    }
+
     /**
      * Network interface for a the protocol. If not specified, server will bind all interfaces.
      */
@@ -1204,7 +1207,4 @@ public final class Keys {
             Collections.singletonList(KeyType.GLOBAL),
             "time,position,speed,course,accuracy,result");
 
-    private Keys() {
-    }
-
 }
diff --git a/src/main/java/org/traccar/config/LookupContext.java b/src/main/java/org/traccar/config/LookupContext.java
new file mode 100644
index 000000000..e73e5a35e
--- /dev/null
+++ b/src/main/java/org/traccar/config/LookupContext.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.traccar.config;
+
+public interface LookupContext {
+
+    class Global implements LookupContext {
+    }
+
+    class User implements LookupContext {
+
+        private final long userId;
+
+        public long getUserId() {
+            return userId;
+        }
+
+        public User(long userId) {
+            this.userId = userId;
+        }
+
+    }
+
+    class Device implements LookupContext {
+
+        private final long deviceId;
+
+        public long getDeviceId() {
+            return deviceId;
+        }
+
+        public Device(long deviceId) {
+            this.deviceId = deviceId;
+        }
+
+    }
+
+}