public static Delegate GetReadMethodInfo <T>()
{
Type[] args = null;
var typeOfT = typeof(T);
if (typeOfT.IsDictionary() && (args = typeOfT.GetGenericArguments()) != null && args.Length == 2)
{
var metadataToken = unchecked (((ulong)(uint)args[0].MetadataToken << 32) | (ulong)(uint)args[1].MetadataToken);
if (_readCache.TryGetValue(metadataToken, out var dstMethod))
{
return(dstMethod);
}
else
{
var method = TypeSearcher.GetMethodsFromType(typeof(TBinaryExtendor), new Type[] { typeof(BinaryReader) }).FirstOrDefault();
dstMethod = method?.MakeGenericMethod(args).CreateDelegate(typeof(Func <BinaryReader, T>));
if (dstMethod != null)
{
_readCache[metadataToken] = dstMethod;
return(dstMethod);
}
}
}
return(null);
}
/// <summary>
/// Static initializer;
/// Basically searches for a method in the BinaryWriter/Reader class to automatically handle the given types
/// </summary>
static TBinaryAccessor()
{
var typeOfT = typeof(T);
if (typeOfT == typeof(string))
{
//Looks a bit ugly, but ¯\_(ツ)_/¯
//For reading:
// 1.Read the len of the next string
// 2.Read the amount of len of bytes and decode it to a string
//For writing:
// 1: Convert the given string to a byte[]
// 2: Write the len of bytes in the array onto the stream
// 3: Write the bytes onto the stream
RegisterExtension(new Func <BinaryReader, string>(x => BaseEncoding.GetString(x.ReadBytes(x.ReadInt32()))) as Func <BinaryReader, T>, new Action <BinaryWriter, string>((m, x) =>
{
var dstBytes = BaseEncoding.GetBytes(x);
m.Write(dstBytes.Length);
m.Write(dstBytes);
}) as Action <BinaryWriter, T>
);
}
else if (typeOfT.IsPrimitive)
{
//Search for a method to read the given type
var readMethodInfo = TypeSearcher.GetMethodsFromType(typeof(BinaryReader), new Type[0], typeOfT).FirstOrDefault(m => m.Name.StartsWith("Read") && m.Name != "Read");
if (readMethodInfo != null)
{
//Create a delegate, so that we don't have to use Methodinfo.Invoke which slows down the whole process
_storReadFunc = (Func <BinaryReader, T>)readMethodInfo.CreateDelegate(typeof(Func <BinaryReader, T>));
}
//Search for a method to write the given type onto a stream
var writeMethodInfo = TypeSearcher.GetMethodsFromType(typeof(BinaryWriter), new Type[] { typeOfT }).FirstOrDefault();
if (writeMethodInfo != null)
{
_storWriteAct = (Action <BinaryWriter, T>)writeMethodInfo.CreateDelegate(typeof(Action <BinaryWriter, T>));
}
}
else
{
_storWriteAct = (bw, data) =>
{
var serializer = (Func <T, byte[]>)MatroschkaResolve.GetWriteMethodInfo(data);
if (serializer != null)
{
bw.Write(serializer(data));
}
};
_storReadFunc = br =>
{
var eval = (Func <BinaryReader, T>)MatroschkaResolve.GetReadMethodInfo <T>();
return(eval == null ? default(T) : eval(br));
};
}
}
