private byte[] CallToData(MethodInfo method, IInvocation invocation)
{
using (var mem = new MemoryStream())
{
var call = new MarshallingMessage
{
Interface = method.DeclaringType.Name,
Method = method.Name,
ParamCount = invocation.Arguments.Length
};
for (int i = 0; i < invocation.Arguments.Length; i++)
{
if (invocation.Arguments[i] == null)
{
call.NullParamIndices.Add(i);
}
}
ProtoSerializer.Serialize(mem, call);
foreach (var arg in invocation.Arguments)
{
if (arg != null)
{
ProtoSerializer.Serialize(mem, arg);
}
}
return(mem.ToArray());
}
}
private object DataToResult(byte[] data, MethodInfo method)
{
if (data.Length == 0)
{
return(Convert.ChangeType(null, method.ReturnType));
}
using (var mem = new MemoryStream(data))
{
var result = ProtoSerializer.Deserialize(mem, method.ReturnType);
return(Convert.ChangeType(result, method.ReturnType));
}
}
private byte[] ResultToBytes(object result)
{
if (result == null)
{
return(new byte[0]);
}
using (var mem = new MemoryStream())
{
ProtoSerializer.Serialize(mem, result);
return(mem.ToArray());
}
}
public byte[] Call(byte[] data)
{
using (var mem = new MemoryStream(data))
{
var msg = ProtoSerializer.Deserialize <MarshallingMessage>(mem);
var obj = GetImplementation(msg.Interface);
var method = obj.GetType().GetMethod(msg.Method);
var parameters = method.GetParameters();
if (parameters.Count() != msg.ParamCount && parameters.Count(p => p.IsOptional == false) != msg.ParamCount)
{
throw new InvalidDataException(
$"Method {msg.Interface}.{msg.Method} received {msg.ParamCount} parameters, but {parameters.Length} required");
}
var values = new object[parameters.Count()];
for (var i = 0; i < parameters.Count(); i++)
{
if (msg.NullParamIndices.Contains(i))
{
continue;
}
values[i] = ProtoSerializer.Deserialize(mem, parameters[i].ParameterType);
if (parameters[i].IsOptional && values[i] == null)
{
values[i] = Type.Missing;
}
}
try
{
var result = method.Invoke(obj, values);
return(ResultToBytes(result));
}
catch (Exception e)
{
if (e is TargetInvocationException && e.InnerException != null)
{
throw e.InnerException;
}
throw;
}
}
}
