/// <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);
}
#pragma warning disable CS1572 // Not all parameters will be used depending on feature flags
/// <summary>
/// Deserialize a SearchSuggestion and its model.
/// </summary>
/// <param name="element">A JSON element.</param>
/// <param name="serializer">
/// Optional serializer that can be used to customize the serialization
/// of strongly typed models.
/// </param>
/// <param name="options">JSON serializer options.</param>
/// <param name="async">Whether to execute sync or async.</param>
/// <param name="cancellationToken">
/// Optional <see cref="CancellationToken"/> to propagate notifications
/// that the operation should be canceled.
/// </param>
/// <returns>Deserialized SearchSuggestion.</returns>
internal static async Task <SearchSuggestion <T> > DeserializeAsync(
JsonElement element,
#if EXPERIMENTAL_SERIALIZER
ObjectSerializer serializer,
#endif
JsonSerializerOptions options,
bool async,
CancellationToken cancellationToken)
#pragma warning restore CS1572
{
Debug.Assert(options != null);
SearchSuggestion <T> suggestion = new SearchSuggestion <T>();
foreach (JsonProperty prop in element.EnumerateObject())
{
if (prop.NameEquals(Constants.SearchTextKeyJson.EncodedUtf8Bytes))
{
suggestion.Text = prop.Value.GetString();
break; // We only have one non-model property
}
}
// Deserialize the model
#if EXPERIMENTAL_SERIALIZER
if (serializer != null)
{
using Stream stream = element.ToStream();
T document = async ?
(T)await serializer.DeserializeAsync(stream, typeof(T)).ConfigureAwait(false) :
(T)serializer.Deserialize(stream, typeof(T));
suggestion.Document = document;
}
else
{
#endif
T document;
if (async)
{
using Stream stream = element.ToStream();
document = await JsonSerializer.DeserializeAsync <T>(stream, options, cancellationToken).ConfigureAwait(false);
}
else
{
document = JsonSerializer.Deserialize <T>(element.GetRawText(), options);
}
suggestion.Document = document;
#if EXPERIMENTAL_SERIALIZER
}
#endif
return(suggestion);
}
#pragma warning disable CS1572 // Not all parameters will be used depending on feature flags
/// <summary>
/// Deserialize the SuggestResults.
/// </summary>
/// <param name="json">A JSON stream.</param>
/// <param name="serializer">
/// Optional serializer that can be used to customize the serialization
/// of strongly typed models.
/// </param>
/// <param name="async">Whether to execute sync or async.</param>
/// <param name="cancellationToken">
/// Optional <see cref="CancellationToken"/> to propagate notifications
/// that the operation should be canceled.
/// </param>
/// <returns>Deserialized SuggestResults.</returns>
internal static async Task <SuggestResults <T> > DeserializeAsync(
Stream json,
#if EXPERIMENTAL_SERIALIZER
ObjectSerializer serializer,
#endif
bool async,
CancellationToken cancellationToken)
#pragma warning restore CS1572
{
// Parse the JSON
using JsonDocument doc = async ?
await JsonDocument.ParseAsync(json, cancellationToken : cancellationToken).ConfigureAwait(false) :
JsonDocument.Parse(json);
JsonSerializerOptions defaultSerializerOptions = JsonSerialization.SerializerOptions;
SuggestResults <T> suggestions = new SuggestResults <T>();
foreach (JsonProperty prop in doc.RootElement.EnumerateObject())
{
if (prop.NameEquals(Constants.SearchCoverageKeyJson.EncodedUtf8Bytes) &&
prop.Value.ValueKind != JsonValueKind.Null)
{
suggestions.Coverage = prop.Value.GetDouble();
}
else if (prop.NameEquals(Constants.ValueKeyJson.EncodedUtf8Bytes))
{
List <SearchSuggestion <T> > results = new List <SearchSuggestion <T> >();
foreach (JsonElement element in prop.Value.EnumerateArray())
{
SearchSuggestion <T> suggestion = await SearchSuggestion <T> .DeserializeAsync(
element,
#if EXPERIMENTAL_SERIALIZER
serializer,
#endif
defaultSerializerOptions,
async,
cancellationToken)
.ConfigureAwait(false);
results.Add(suggestion);
}
suggestions.Results = new ReadOnlyCollection <SearchSuggestion <T> >(results);
}
}
return(suggestions);
}
/// <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.");
