private static object MapListElements()

in src/Readers/Vipr.Reader.OData.v4/ODataVocabularyReader.cs [344:379]

• 30 lines of code
• 4 McCabe index (conditional complexity)

        private static object MapListElements(IEdmDelayedValue delayedValue)
        {
            IEdmValue edmValue;
            try
            {
                edmValue = delayedValue.Value;
                return MapToClr(edmValue);
            }
            catch (ArgumentNullException)
            {
                // This is a painful hack to deal with the fact that parsing the navigation
                // property returned a delayedValue that evaluates a NullException when you call .Value
                // Attempt to obtain the inner expression because we don't have access to the type of the Delayed Collection 
                var innerExpression = delayedValue.GetPropertyByName<IEdmExpression>("Expression");

                switch (innerExpression.ExpressionKind)
                {
                    case EdmExpressionKind.NavigationPropertyPath:
                    {
                        IEdmPathExpression pe = innerExpression as IEdmPathExpression;
                        if (pe == null)
                        {
                            throw new ArgumentNullException("delayedValue",
                                "A IEdmExpression of delayedValue type NavigationPropertyPath was unable to be cast correctly to a IEdmNavigationPropertyPath");
                        }

                        // Map navigation properties to strings for convenience
                        return string.Join("/", pe.Path);
                    }
                    default:
                        throw new NotImplementedException(
                            string.Format("A custom mapping for ExpressionKind {0} has not yet been implemented.",
                                innerExpression.ExpressionKind));
                }
            }
        }