/// <summary>
/// Based on the type information present in this descriptor create method that takes
/// the returned _source and hit and returns the ClrType it should deserialize too.
/// This is so that Documents[A] can contain actual instances of subclasses B, C as well.
/// If you specify types using .Type(typeof(B), typeof(C)) then NEST can automagically
/// create a TypeSelector based on the hits _type property.
/// </summary>
public static void CloseOverAutomagicCovariantResultSelector(Inferrer infer, ICovariantSearchRequest self)
{
if (infer == null || self == null)
{
return;
}
var returnType = self.ClrType;
if (returnType == null)
{
return;
}
var types = self.ElasticsearchTypes?.Match(all => new TypeName[] { "_all" }, many => many.Types);
types = (types ?? Enumerable.Empty <TypeName>()).Where(t => t.Type != null).ToList();
if (self.TypeSelector != null || !types.HasAny(t => t.Type != returnType))
{
return;
}
var typeDictionary = types.ToDictionary(infer.TypeName, t => t.Type);
self.TypeSelector = (o, h) => !typeDictionary.TryGetValue(h.Type, out var t) ? returnType : t;
}
/// <summary>
/// Based on the type information present in this descriptor create method that takes
/// the returned _source and hit and returns the ClrType it should deserialize too.
/// This is so that Documents[A] can contain actual instances of subclasses B, C as well.
/// If you specify types using .Types(typeof(B), typeof(C)) then NEST can automagically
/// create a TypeSelector based on the hits _type property.
/// </summary>
public static void CloseOverAutomagicCovariantResultSelector(Inferrer infer, ICovariantSearchRequest self)
{
if (infer == null || self == null) return;
var returnType = self.ClrType;
if (returnType == null) return;
var types = self.ElasticsearchTypes?.Match(all => new TypeName[] { "_all" }, many => many.Types);
types = (types ?? Enumerable.Empty<TypeName>()).Where(t => t.Type != null).ToList();
if (self.TypeSelector != null || !types.HasAny(t => t.Type != returnType))
return;
var typeDictionary = types.ToDictionary(infer.TypeName, t => t.Type);
self.TypeSelector = (o, h) =>
{
Type t;
return !typeDictionary.TryGetValue(h.Type, out t) ? returnType : t;
};
}
