public int Serialize(ref byte[] bytes, int offset, JT809_0x9300 value)
{
offset += JT809BinaryExtensions.WriteUInt16Little(bytes, offset, (ushort)value.SubBusinessType);
//offset += JT809BinaryExtensions.WriteUInt32Little(memoryOwner, offset, value.DataLength);
//JT809.Protocol.Enums.JT809BusinessType 映射对应消息特性
JT809BodiesTypeAttribute jT809SubBodiesTypeAttribute = value.SubBusinessType.GetAttribute <JT809BodiesTypeAttribute>();
if (jT809SubBodiesTypeAttribute == null)
{
throw new JT809Exception(JT809ErrorCode.GetAttributeError, $"JT809BodiesTypeAttribute Not Found>{value.SubBusinessType.ToString()}");
}
try
{
// 先写入内容，然后在根据内容反写内容长度
offset = offset + 4;
int contentOffset = JT809FormatterResolverExtensions.JT809DynamicSerialize(JT809FormatterExtensions.GetFormatter(jT809SubBodiesTypeAttribute.JT809BodiesType), ref bytes, offset, value.SubBodies);
JT809BinaryExtensions.WriteUInt32Little(bytes, offset - 4, (uint)(contentOffset - offset));
offset = contentOffset;
}
catch
{
throw new JT809Exception(JT809ErrorCode.SubBodiesParseError, $"SubBusinessType>{value.SubBusinessType.ToString()}");
}
return(offset);
}
public int Serialize(ref byte[] bytes, int offset, JT809Package value)
{
// 1. 先序列化数据体，根据数据体的长度赋值给头部，在序列化头部。
int messageBodyOffset = 0;
JT809BodiesTypeAttribute jT809BodiesTypeAttribute = value.Header.BusinessType.GetAttribute <JT809BodiesTypeAttribute>();
if (jT809BodiesTypeAttribute != null)
{
if (value.Bodies != null)
{
// 1.1 处理数据体
messageBodyOffset = JT809FormatterResolverExtensions.JT809DynamicSerialize(JT809FormatterExtensions.GetFormatter(jT809BodiesTypeAttribute.JT809BodiesType), ref bytes, messageBodyOffset, value.Bodies);
}
}
byte[] messageBodyData = null;
if (messageBodyOffset != 0)
{
messageBodyData = bytes.AsSpan(0, messageBodyOffset).ToArray();
// 1.2 数据加密
switch (value.Header.EncryptFlag)
{
case JT809Header_Encrypt.None:
break;
case JT809Header_Encrypt.Common:
messageBodyData = JT809GlobalConfig.Instance.Encrypt.Encrypt(messageBodyData, value.Header.EncryptKey);
break;
}
}
// ------------------------------------开始组包
// 1.起始符
offset += JT809BinaryExtensions.WriteByteLittle(bytes, offset, value.BeginFlag);
// 2.赋值头数据长度
if (messageBodyOffset != 0)
{
value.Header.MsgLength = (uint)(JT809Package.FixedByteLength + messageBodyData.Length);
}
else
{
value.Header.MsgLength = JT809Package.FixedByteLength;
}
// 2.1写入头部数据
offset = JT809FormatterExtensions.GetFormatter <JT809Header>().Serialize(ref bytes, offset, value.Header);
if (messageBodyOffset != 0)
{
// 3. 写入数据体
Array.Copy(messageBodyData, 0, bytes, offset, messageBodyData.Length);
offset += messageBodyData.Length;
messageBodyData = null;
}
// 4.校验码
offset += JT809BinaryExtensions.WriteUInt16Little(bytes, offset, bytes.ToCRC16_CCITT(1, offset));
// 5.终止符
offset += JT809BinaryExtensions.WriteByteLittle(bytes, offset, value.EndFlag);
// 6.转义
byte[] temp = JT809Escape(bytes.AsSpan(0, offset));
Array.Copy(temp, 0, bytes, 0, temp.Length);
return(temp.Length);
}