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/*
* Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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.protocol;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.traccar.BaseProtocolEncoder;
import org.traccar.helper.Crc;
import org.traccar.model.Command;
public class KhdProtocolEncoder extends BaseProtocolEncoder {
private static final int MSG_CUT_OIL = 0x39;
private static final int MSG_RESUME_OIL = 0x38;
private ChannelBuffer encodeCommand(int command) {
ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
buf.writeByte(0x29);
buf.writeByte(0x29);
buf.writeByte(command);
buf.writeShort(6); // size
buf.writeInt(0); // terminal id
buf.writeByte(Crc.xorChecksum(buf.toByteBuffer()));
buf.writeByte(0x0D); // ending
return buf;
}
@Override
protected Object encodeCommand(Command command) {
switch (command.getType()) {
case Command.TYPE_ENGINE_STOP:
return encodeCommand(MSG_CUT_OIL);
case Command.TYPE_ENGINE_RESUME:
return encodeCommand(MSG_RESUME_OIL);
}
return null;
}
}
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