/// <summary>
/// Parse a SearchSuggestion and its model.
/// </summary>
/// <param name="reader">The JSON reader.</param>
/// <param name="typeToConvert">The type to parse into.</param>
/// <param name="options">Serialization options.</param>
/// <returns>The deserialized suggestion.</returns>
public override SearchSuggestion <T> Read(
ref Utf8JsonReader reader,
Type typeToConvert,
JsonSerializerOptions options)
{
Debug.Assert(options != null);
SearchSuggestion <T> suggestion = new SearchSuggestion <T>();
// Clone the reader so we can get the search text property without
// advancing the reader over any properties needed to deserialize
// the user's model type.
Utf8JsonReader clone = reader;
clone.Expects(JsonTokenType.StartObject);
while (clone.Read() && clone.TokenType != JsonTokenType.EndObject)
{
string name = clone.ExpectsPropertyName();
if (name == Constants.SearchTextKey)
{
suggestion.Text = clone.ExpectsString();
break;
}
}
// Deserialize the model
T document = JsonSerializer.Deserialize <T>(ref reader, options);
suggestion.Document = document;
return(suggestion);
}
/// <summary>
/// Parse the SuggestResults and its suggestions.
/// </summary>
/// <param name="reader">The JSON reader.</param>
/// <param name="typeToConvert">The type to parse into.</param>
/// <param name="options">Serialization options.</param>
/// <returns>The deserialized suggestions.</returns>
public override SuggestResults <T> Read(
ref Utf8JsonReader reader,
Type typeToConvert,
JsonSerializerOptions options)
{
Debug.Assert(typeToConvert != null);
Debug.Assert(typeToConvert.IsAssignableFrom(typeof(SuggestResults <T>)));
Debug.Assert(options != null);
SuggestResults <T> suggestions = new SuggestResults <T>();
reader.Expects(JsonTokenType.StartObject);
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
switch (reader.ExpectsPropertyName())
{
case Constants.SearchCoverageKey:
suggestions.Coverage = reader.ExpectsNullableDouble();
break;
case Constants.ValueKey:
reader.Expects(JsonTokenType.StartArray);
while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
{
SearchSuggestion <T> suggestion =
_suggestionConverter.Read(ref reader, _suggestionType, options);
suggestions.Results.Add(suggestion);
}
break;
default:
// Ignore other properties (including OData context, etc.)
reader.Skip();
break;
}
}
return(suggestions);
}
/// <summary>
/// Serializing SearchSuggestion isn't supported as it's an output only
/// model type. This always fails.
/// </summary>
/// <param name="writer">The JSON writer.</param>
/// <param name="value">The suggestion.</param>
/// <param name="options">Serialization options.</param>
public override void Write(Utf8JsonWriter writer, SearchSuggestion <T> value, JsonSerializerOptions options) =>
throw new NotSupportedException($"{nameof(SearchSuggestion<T>)} cannot be serialized to JSON.");
