BaseModel.java
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package com.viontech.model;
import io.netty.buffer.ByteBuf;
import lombok.Getter;
import lombok.Setter;
import lombok.experimental.Accessors;
/**
* .
*
* @author 谢明辉
* @date 2020/8/20
*/
@Getter
@Setter
@Accessors(chain = true)
public class BaseModel {
protected Long deviceId;
protected Long length;
protected Long firstInt;
protected Long secondInt;
protected byte[] data;
/**
* 将byteBuf 转换为 model
*
* @param byteBuf byteBuf
*
* @return model
*/
public static BaseModel from(ByteBuf byteBuf) {
long deviceId = byteBuf.readUnsignedInt();
long length = byteBuf.readUnsignedInt();
long firstInt = byteBuf.readUnsignedInt();
long secondInt = byteBuf.readUnsignedInt();
BaseModel model;
switch ((int) firstInt) {
case 0x00010100:
model = new LoginData();
break;
case 0x0001FFFF:
model = new KeepAlive();
break;
default:
return null;
}
model.setDeviceId(deviceId);
model.setLength(length);
model.setFirstInt(firstInt);
model.setSecondInt(secondInt);
if (length > 16) {
model.data = new byte[(int) (length - 16)];
byteBuf.readBytes(model.data);
model.decodeData();
}
return model;
}
public static int castLong2Int(long data) {
return (int) (data & 0xFF);
}
/**
* 将 model 转换为 byteBuf
*
* @return byteBuf
*/
public void to(ByteBuf byteBuf) {
encodeData();
byteBuf.writeInt(castLong2Int(deviceId));
byteBuf.writeInt(castLong2Int(length));
byteBuf.writeInt(castLong2Int(firstInt));
byteBuf.writeInt(castLong2Int(secondInt));
if (data != null && data.length > 0) {
byteBuf.writeBytes(data);
}
}
protected void encodeData() {
}
protected void decodeData() {
}
}