AzureLens.Areas.HelpPage.ModelDescriptions.ModelDescriptionGenerator.GetOrCreateModelDescription C# (CSharp) Method

        public ModelDescription GetOrCreateModelDescription(Type modelType)
        {
            if (modelType == null)
            {
                throw new ArgumentNullException("modelType");
            }

            Type underlyingType = Nullable.GetUnderlyingType(modelType);
            if (underlyingType != null)
            {
                modelType = underlyingType;
            }

            ModelDescription modelDescription;
            string modelName = ModelNameHelper.GetModelName(modelType);
            if (GeneratedModels.TryGetValue(modelName, out modelDescription))
            {
                if (modelType != modelDescription.ModelType)
                {
                    throw new InvalidOperationException(
                        String.Format(
                            CultureInfo.CurrentCulture,
                            "A model description could not be created. Duplicate model name '{0}' was found for types '{1}' and '{2}'. " +
                            "Use the [ModelName] attribute to change the model name for at least one of the types so that it has a unique name.",
                            modelName,
                            modelDescription.ModelType.FullName,
                            modelType.FullName));
                }

                return modelDescription;
            }

            if (DefaultTypeDocumentation.ContainsKey(modelType))
            {
                return GenerateSimpleTypeModelDescription(modelType);
            }

            if (modelType.IsEnum)
            {
                return GenerateEnumTypeModelDescription(modelType);
            }

            if (modelType.IsGenericType)
            {
                Type[] genericArguments = modelType.GetGenericArguments();

                if (genericArguments.Length == 1)
                {
                    Type enumerableType = typeof(IEnumerable<>).MakeGenericType(genericArguments);
                    if (enumerableType.IsAssignableFrom(modelType))
                    {
                        return GenerateCollectionModelDescription(modelType, genericArguments[0]);
                    }
                }
                if (genericArguments.Length == 2)
                {
                    Type dictionaryType = typeof(IDictionary<,>).MakeGenericType(genericArguments);
                    if (dictionaryType.IsAssignableFrom(modelType))
                    {
                        return GenerateDictionaryModelDescription(modelType, genericArguments[0], genericArguments[1]);
                    }

                    Type keyValuePairType = typeof(KeyValuePair<,>).MakeGenericType(genericArguments);
                    if (keyValuePairType.IsAssignableFrom(modelType))
                    {
                        return GenerateKeyValuePairModelDescription(modelType, genericArguments[0], genericArguments[1]);
                    }
                }
            }

            if (modelType.IsArray)
            {
                Type elementType = modelType.GetElementType();
                return GenerateCollectionModelDescription(modelType, elementType);
            }

            if (modelType == typeof(NameValueCollection))
            {
                return GenerateDictionaryModelDescription(modelType, typeof(string), typeof(string));
            }

            if (typeof(IDictionary).IsAssignableFrom(modelType))
            {
                return GenerateDictionaryModelDescription(modelType, typeof(object), typeof(object));
            }

            if (typeof(IEnumerable).IsAssignableFrom(modelType))
            {
                return GenerateCollectionModelDescription(modelType, typeof(object));
            }

            return GenerateComplexTypeModelDescription(modelType);
        }

 private static ModelDescriptionGenerator InitializeModelDescriptionGenerator(HttpConfiguration config)
 {
     ModelDescriptionGenerator modelGenerator = new ModelDescriptionGenerator(config);
     Collection<ApiDescription> apis = config.Services.GetApiExplorer().ApiDescriptions;
     foreach (ApiDescription api in apis)
     {
         ApiParameterDescription parameterDescription;
         Type parameterType;
         if (TryGetResourceParameter(api, config, out parameterDescription, out parameterType))
         {
             modelGenerator.GetOrCreateModelDescription(parameterType);
         }
     }
     return modelGenerator;
 }