1 files changed, 25 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/storage/Storage.java b/src/main/java/org/traccar/storage/Storage.java
new file mode 100644
index 000000000..b95ce9505
--- /dev/null
+++ b/src/main/java/org/traccar/storage/Storage.java
@@ -0,0 +1,25 @@
+package org.traccar.storage;
+
+import org.traccar.storage.query.Request;
+
+import java.util.List;
+
+public abstract class Storage {
+
+    abstract <T> List<T> getObjects(Class<T> clazz, Request request) throws StorageException;
+
+    abstract <T> long addObject(T entity, Request request) throws StorageException;
+
+    abstract <T> void updateObject(T entity, Request request) throws StorageException;
+
+    abstract void removeObject(Class<?> clazz, Request request) throws StorageException;
+
+    <T> T getObject(Class<T> clazz, Request request) throws StorageException {
+        var objects = getObjects(clazz, request);
+        if (objects.isEmpty()) {
+            throw new StorageException("No objects found");
+        }
+        return objects.get(0);
+    }
+
+}