private Task <IActionResult> ToActionResultAsync(object returnValue, Type returnType, IActionResultTypeMapper mapper)
{
//Null
if (returnValue == null || returnType == typeof(Task) || returnType == typeof(ValueTask))
{
return(Task.FromResult <IActionResult>(NullActionResult.Instance));
}
//IActionResult
if (returnValue is IActionResult actionResult)
{
return(Task.FromResult(actionResult));
}
//Task<TResult>
if (returnType.IsGenericType && returnType.GetGenericTypeDefinition() == typeof(Task <>))
{
var declaredType = returnType.GenericTypeArguments.Single();
var taskOfResult = _taskConvertMethod.MakeGenericMethod(declaredType).Invoke(null, new object[] { returnValue, mapper });
return((Task <IActionResult>)taskOfResult);
}
//ValueTask<TResult>
if (returnType.IsGenericType && returnType.GetGenericTypeDefinition() == typeof(ValueTask <>))
{
var declaredType = returnType.GenericTypeArguments.Single();
var valueTaskOfResult = _valueTaskConvertMethod.MakeGenericMethod(declaredType).Invoke(null, new object[] { returnValue, mapper });
return((Task <IActionResult>)valueTaskOfResult);
}
return(Task.FromResult(mapper.Convert(returnValue, returnType)));
}
private static async Task <IActionResult> ConvertFromValueTaskAsync <TValue>(ValueTask <TValue> returnValue, IActionResultTypeMapper mapper)
{
var result = await returnValue;
return(result is IActionResult actionResult
? actionResult
: mapper.Convert(result, typeof(TValue)));
}
private IActionResult ConvertToActionResult(IActionResultTypeMapper mapper, object returnValue, Type declaredType)
{
var result = (returnValue as IActionResult) ?? mapper.Convert(returnValue, declaredType);
if (result == null)
{
throw new InvalidOperationException(Resources.FormatActionResult_ActionReturnValueCannotBeNull(declaredType));
}
return(result);
}
private IActionResult ConvertToActionResult(IActionResultTypeMapper mapper, object returnValue, Type declaredType)
{
var result = (returnValue as IActionResult) ?? mapper.Convert(returnValue, declaredType);
if (result == null)
{
throw new InvalidOperationException();
}
return(result);
}