/* * 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.Checksum; 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(Checksum.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; } }