public static Type ExtractChildObjectTypeFromPath([NotNull] Type modelType, [NotNull] ExcelTemplatePath path)
{
var currType = modelType;
foreach (var part in path.PartsWithIndexers)
{
var childPropertyType = ExtractPropertyInfo(currType, part).PropertyType;
if (TemplateDescriptionHelper.IsCollectionAccessPathPart(part))
{
if (TypeCheckingHelper.IsDictionary(childPropertyType))
{
var(keyType, valueType) = TypeCheckingHelper.GetDictionaryGenericTypeArguments(childPropertyType);
TemplateDescriptionHelper.ParseCollectionIndexerOrThrow(TemplateDescriptionHelper.GetCollectionAccessPathPartIndex(part), keyType);
currType = valueType;
}
else if (TypeCheckingHelper.IsIList(childPropertyType))
{
TemplateDescriptionHelper.ParseCollectionIndexerOrThrow(TemplateDescriptionHelper.GetCollectionAccessPathPartIndex(part), typeof(int));
currType = TypeCheckingHelper.GetEnumerableItemType(childPropertyType);
}
else
{
throw new ObjectPropertyExtractionException($"Not supported collection type {childPropertyType}");
}
}
else if (TemplateDescriptionHelper.IsArrayPathPart(part))
{
if (TypeCheckingHelper.IsIList(childPropertyType))
{
currType = TypeCheckingHelper.GetIListItemType(childPropertyType);
}
else
{
throw new ObjectPropertyExtractionException($"Not supported collection type {childPropertyType}");
}
}
else
{
currType = childPropertyType;
}
}
return(currType);
}
private static bool TryExtractDirectChild([NotNull] object model, [NotNull] string pathPart, out object child)
{
child = null;
if (TemplateDescriptionHelper.IsCollectionAccessPathPart(pathPart))
{
var name = TemplateDescriptionHelper.GetCollectionAccessPathPartName(pathPart);
var key = TemplateDescriptionHelper.GetCollectionAccessPathPartIndex(pathPart);
if (!TryExtractCurrentChildPropertyInfo(model, name, out var collectionPropertyInfo))
{
return(false);
}
if (TypeCheckingHelper.IsDictionary(collectionPropertyInfo.PropertyType))
{
var indexer = TemplateDescriptionHelper.ParseCollectionIndexerOrThrow(key, TypeCheckingHelper.GetDictionaryGenericTypeArguments(collectionPropertyInfo.PropertyType).keyType);
var dict = collectionPropertyInfo.GetValue(model, null);
if (dict == null)
{
return(true);
}
child = ((IDictionary)dict)[indexer];
return(true);
}
if (TypeCheckingHelper.IsIList(collectionPropertyInfo.PropertyType))
{
var indexer = (int)TemplateDescriptionHelper.ParseCollectionIndexerOrThrow(key, typeof(int));
var list = collectionPropertyInfo.GetValue(model, null);
if (list == null)
{
return(true);
}
child = ((IList)list)[indexer];
return(true);
}
throw new ObjectPropertyExtractionException($"Unexpected child type: expected dictionary or array (pathPath='{pathPart}'), but model is '{collectionPropertyInfo.PropertyType}' in '{model.GetType()}'");
}
if (!TryExtractCurrentChildPropertyInfo(model, pathPart, out var propertyInfo))
{
return(false);
}
child = propertyInfo.GetValue(model, null);
return(true);
}