public void OnMethodCall(MethodCall call, IResult result)
{
if (call.Method == "increment")
{
var counter = (Java.Lang.Integer)call.Arguments();
result.Success(new Java.Lang.Integer(counter.IntValue() + 1));
}
else
{
result.NotImplemented();
}
}
private void BackgroundHandleMethodCall(FlutnetMethodInfo methodInfo, MethodCall call)
{
FlutnetRuntime.OperationInfo operation;
try
{
operation = FlutnetRuntime.GetOperation(methodInfo.Instance, methodInfo.Operation);
}
catch (Exception)
{
SendError(methodInfo, new FlutnetException(FlutnetErrorCode.OperationNotImplemented));
return;
}
if (operation.Parameters.Length > 0 && call.Arguments() == null)
{
SendError(methodInfo, new FlutnetException(FlutnetErrorCode.OperationArgumentCountMismatch));
return;
}
object[] arguments = new object[operation.Parameters.Length];
try
{
for (int i = 0; i < operation.Parameters.Length; i++)
{
ParameterInfo param = operation.Parameters[i];
Type paramType = param.IsOut || param.ParameterType.IsByRef
? param.ParameterType.GetElementType()
: param.ParameterType;
string paramName = param.Name.FirstCharUpper();
object value;
if (call.HasArgument(paramName))
{
Object argumentValue = call.Argument(paramName);
string serializedArg = argumentValue.ToString();
// Deserialize the argument
value = JsonConvert.DeserializeObject(serializedArg, paramType, FlutterInterop.JsonSerializerSettings);
}
else if (param.HasDefaultValue)
{
value = param.DefaultValue;
}
else
{
SendError(methodInfo, new FlutnetException(FlutnetErrorCode.InvalidOperationArguments));
return;
}
arguments[i] = value;
}
}
catch (Exception)
{
SendError(methodInfo, new FlutnetException(FlutnetErrorCode.OperationArgumentParsingError));
return;
}
PlatformOperationResult result = PlatformOperationRunner.Run(operation, arguments);
if (result.Error != null)
{
if (result.Error is PlatformOperationException flutterException)
{
SendError(methodInfo, flutterException);
}
else
{
//In case of an unhandled exception, send to Flutter a verbose error message for better diagnostic
FlutnetException error = new FlutnetException(FlutnetErrorCode.OperationFailed, result.Error.ToStringCleared(), result.Error);
SendError(methodInfo, error);
}
}
else
{
SendResult(methodInfo, result.Result);
}
}