private ExpressionResolutionResult ResolveExpression(IMemberMap propertyMap, Type currentType, Expression instanceParameter, LetPropertyMaps letPropertyMaps)
{
var result = new ExpressionResolutionResult(instanceParameter, currentType);
var matchingExpressionConverter = _configurationProvider.ResultConverters.FirstOrDefault(c => c.CanGetExpressionResolutionResult(result, propertyMap));
if (matchingExpressionConverter == null)
{
ThrowCannotMap(propertyMap, result);
return(null);
}
result = matchingExpressionConverter.GetExpressionResolutionResult(result, propertyMap, letPropertyMaps);
if (propertyMap.NullSubstitute != null && result.ResolutionExpression is MemberExpression && (result.Type.IsNullableType() || result.Type == typeof(string)))
{
return(new ExpressionResolutionResult(propertyMap.NullSubstitute(result.ResolutionExpression)));
}
return(result);
}
