public static IndexDefinitionCollection GetIndexDefinitions(this TypeInfo type)
{
var definitions = new IndexDefinitionCollection();
GetIndexDefinitionsWorker(type, definitions, string.Empty);
definitions
.SetDocumentType(type.UnderlyingSystemType)
.SetCollectionName(type.GetCollectionName());
return(definitions);
}
private static void GetIndexDefinitionsWorker(TypeInfo type, IndexDefinitionCollection indexes, string fieldPrefix)
{
if (fieldPrefix.Split('.').Count() > 20)
{
throw new InvalidOperationException($"Tree is too deep - could be a recursion. Current 'path' is {fieldPrefix}");
}
var definitions = new Dictionary <string, IndexDefinition>();
type
.GetProperties()
.Where(prop => IsIndexCandidate(prop))
.ToList()
.ForEach(prop =>
{
if (prop.HasAttribute(typeof(IndexAttribute)))
{
prop
.GetSpecificAttribute(typeof(IndexAttribute))
.ForEach(a =>
{
var attribute = (IndexAttribute)a;
IndexDefinition def;
if (!string.IsNullOrEmpty(attribute.Name) && definitions.ContainsKey(attribute.Name))
{
def = definitions[attribute.Name];
}
else
{
def = new IndexDefinition();
def.Name = attribute.Name;
var lookupName = def.Name ?? prop.Name;
definitions.Add(lookupName, def);
}
def.Update(attribute, $"{fieldPrefix}{prop.Name}");
});
}
// if the type of the property could have its own
// properties with [Index], we should look at those too
if (IsSubDocument(prop.PropertyType))
{
GetIndexDefinitionsWorker(prop.PropertyType.GetTypeInfo(), indexes, $"{fieldPrefix}{prop.Name}.");
}
});
indexes.AddRange(definitions.Values.ToList());
}