/*
 * 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) {
            ctx.fireChannelRead(handlePosition((Position) msg));
        } else {
            super.channelRead(ctx, msg);
        }
    }

    protected abstract Position handlePosition(Position position);

}

@@ -1010,28 +1010,28 @@
     
-ctx.fireChannelRead(
+Position position = 
 hand
@@ -1056,18 +1056,114 @@
 on) msg)
-)
 ;
+%0A            if (position != null) %7B%0A                ctx.fireChannelRead(position);%0A            %7D
 %0A       

Fix filter handling (fix #3958)