/* * Copyright 2016 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.protocol; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.traccar.BaseProtocolEncoder; import org.traccar.helper.Log; import org.traccar.model.Command; import java.nio.ByteOrder; import java.nio.charset.StandardCharsets; public class NoranProtocolEncoder extends BaseProtocolEncoder { private ChannelBuffer encodeContent(String content) { ChannelBuffer buf = ChannelBuffers.buffer(ByteOrder.LITTLE_ENDIAN, 12 + 56); buf.writeBytes( ChannelBuffers.copiedBuffer(ByteOrder.LITTLE_ENDIAN, "\r\n*KW", StandardCharsets.US_ASCII)); buf.writeByte(0); buf.writeShort(buf.capacity()); buf.writeShort(NoranProtocolDecoder.MSG_CONTROL); buf.writeInt(0); // gis ip buf.writeShort(0); // gis port buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII)); buf.writerIndex(buf.writerIndex() + 50 - content.length()); buf.writeBytes( ChannelBuffers.copiedBuffer(ByteOrder.LITTLE_ENDIAN, "\r\n", StandardCharsets.US_ASCII)); return buf; } @Override protected Object encodeCommand(Command command) { switch (command.getType()) { case Command.TYPE_POSITION_SINGLE: return encodeContent("*KW,000,000,000000#"); case Command.TYPE_POSITION_PERIODIC: int interval = command.getInteger(Command.KEY_FREQUENCY); return encodeContent("*KW,000,002,000000," + interval + "#"); case Command.TYPE_POSITION_STOP: return encodeContent("*KW,000,002,000000,0#"); case Command.TYPE_ENGINE_STOP: return encodeContent("*KW,000,007,000000,0#"); case Command.TYPE_ENGINE_RESUME: return encodeContent("*KW,000,007,000000,1#"); default: Log.warning(new UnsupportedOperationException(command.getType())); break; } return null; } }