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 = 1;
protected long length;
protected long protocol;
protected long flag;
protected byte[] data;
/**
* 将byteBuf 转换为 model
*
* @param byteBuf byteBuf
*
* @return model
*/
public static BaseModel from(ByteBuf byteBuf) {
long deviceId = byteBuf.readUnsignedIntLE();
long length = byteBuf.readUnsignedIntLE();
long protocol = byteBuf.readUnsignedIntLE();
long flag = byteBuf.readUnsignedIntLE();
BaseModel model;
switch ((int) protocol) {
case 0x00010100:
model = new LoginData();
break;
case 0x0001FFFF:
model = new KeepAlive();
break;
default:
return null;
}
model.setDeviceId(deviceId);
model.setLength(length);
model.setProtocol(protocol);
model.setFlag(flag);
if (length > 16) {
model.data = new byte[(int) (length - 16)];
byteBuf.readBytes(model.data);
model.decodeData();
}
return model;
}
public static int toInt(long data) {
return (int) data;
}
/**
* 将 model 转换为 byteBuf
*/
public void to(ByteBuf byteBuf) {
encodeData();
if (length == 0) {
length = 16 + (data == null ? 0 : data.length);
}
byteBuf.writeIntLE(toInt(deviceId));
byteBuf.writeIntLE(toInt(length));
byteBuf.writeIntLE(toInt(protocol));
byteBuf.writeIntLE(toInt(flag));
if (data != null && data.length > 0) {
byteBuf.writeBytes(data);
}
}
/**
* 重写此方法,将相关的字段组装成 byte[] 并赋值给 data
*/
public void encodeData() {
}
/**
* 重写此方法,将 byte[] 解析到子类的字段中
*/
public void decodeData() {
}
}