1 files changed, 38 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/BaseDataHandler.java b/src/main/java/org/traccar/BaseDataHandler.java
new file mode 100644
index 000000000..48794b0d7
--- /dev/null
+++ b/src/main/java/org/traccar/BaseDataHandler.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 - 2018 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;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import org.traccar.model.Position;
+
+public abstract class BaseDataHandler extends ChannelInboundHandlerAdapter {
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        if (msg instanceof Position) {
+            Position position = handlePosition((Position) msg);
+            if (position != null) {
+                ctx.fireChannelRead(position);
+            }
+        } else {
+            super.channelRead(ctx, msg);
+        }
+    }
+
+    protected abstract Position handlePosition(Position position);
+
+}