/// <summary>
/// Read the @search.facets property value.
/// </summary>
/// <param name="reader">The JSON reader.</param>
/// <param name="results">The SearchResults to add the facets to.</param>
/// <param name="options">JSON serializer options.</param>
private static void ReadFacets(
ref Utf8JsonReader reader,
SearchResults <T> results,
JsonSerializerOptions options)
{
Debug.Assert(results != null);
// Facets are optional, so short circuit if nothing is found
if (reader.TokenType == JsonTokenType.Null)
{
return;
}
results.Facets = new Dictionary <string, IList <FacetResult> >();
reader.Expects(JsonTokenType.StartObject);
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
// Get the name of the facet
string facetName = reader.ExpectsPropertyName();
// Get the values of the facet
List <FacetResult> facets = new List <FacetResult>();
reader.Expects(JsonTokenType.StartArray);
while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
{
FacetResult facet = ReadFacetResult(ref reader, options);
facets.Add(facet);
}
// Add the facet to the results
results.Facets[facetName] = facets;
}
}
/// <summary>
/// Parse the SearchResults and its search results.
/// </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 search results.</returns>
public override SearchResults <T> Read(
ref Utf8JsonReader reader,
Type typeToConvert,
JsonSerializerOptions options)
{
Debug.Assert(typeToConvert != null);
Debug.Assert(typeToConvert.IsAssignableFrom(typeof(SearchResults <T>)));
Debug.Assert(options != null);
SearchResults <T> results = new SearchResults <T>();
reader.Expects(JsonTokenType.StartObject);
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
switch (reader.ExpectsPropertyName())
{
case Constants.ODataCountKey:
results.TotalCount = reader.ExpectsNullableLong();
break;
case Constants.SearchCoverageKey:
results.Coverage = reader.ExpectsNullableDouble();
break;
case Constants.SearchFacetsKey:
ReadFacets(ref reader, results, options);
break;
case Constants.ODataNextLinkKey:
results.NextUri = new Uri(reader.ExpectsString());
break;
case Constants.SearchNextPageKey:
results.NextOptions = ReadNextPageOptions(ref reader);
break;
case Constants.ValueKey:
reader.Expects(JsonTokenType.StartArray);
while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
{
SearchResult <T> result = _resultConverter.Read(ref reader, _resultType, options);
results.Values.Add(result);
}
break;
default:
// Ignore other properties (including OData context, etc.)
reader.Skip();
break;
}
}
return(results);
}
/// <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>
/// Read the @search.highlights property value.
/// </summary>
/// <param name="reader">The JSON reader.</param>
/// <param name="result">The SearchResult to add the highlights to.</param>
private static void ReadHighlights(ref Utf8JsonReader reader, SearchResult <T> result)
{
Debug.Assert(result != null);
result.Highlights = new Dictionary <string, IList <string> >();
reader.Expects(JsonTokenType.StartObject);
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
// Get the highlight field name
string name = reader.ExpectsPropertyName();
// Get the highlight values
List <string> values = new List <string>();
reader.Expects(JsonTokenType.StartArray);
while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
{
values.Add(reader.ExpectsString());
}
// Add the highlight
result.Highlights[name] = values;
}
}
/// <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>
/// Parse a SearchResult 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 search result.</returns>
public override SearchResult <T> Read(
ref Utf8JsonReader reader,
Type typeToConvert,
JsonSerializerOptions options)
{
Debug.Assert(options != null);
SearchResult <T> result = new SearchResult <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;
// Keep track of the properties we've found so we can stop reading
// through the cloned object
bool parsedScore = false;
bool parsedHighlights = false;
clone.Expects(JsonTokenType.StartObject);
while (
(!parsedScore || !parsedHighlights) &&
clone.Read() &&
clone.TokenType != JsonTokenType.EndObject)
{
string name = clone.ExpectsPropertyName();
if (name == Constants.SearchScoreKey)
{
parsedScore = true;
result.Score = clone.ExpectsNullableDouble();
}
else if (name == Constants.SearchHighlightsKey)
{
parsedHighlights = true;
ReadHighlights(ref clone, result);
}
else
{
// Skip the rest of the next property's value
clone.Skip();
}
}
// Deserialize the model
T document = JsonSerializer.Deserialize <T>(ref reader, options);
result.Document = document;
return(result);
}
/// <summary>
/// Read the facet result value.
/// </summary>
/// <param name="reader">JSON reader.</param>
/// <param name="options">Serializer options.</param>
/// <returns>The facet result.</returns>
private static FacetResult ReadFacetResult(
ref Utf8JsonReader reader,
JsonSerializerOptions options)
{
FacetResult facet = new FacetResult();
reader.Expects(JsonTokenType.StartObject);
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
// Get the name of the facet property
string facetName = reader.ExpectsPropertyName();
if (facetName == Constants.CountKey)
{
facet.Count = reader.ExpectsNullableLong();
}
else
{
object value = reader.ReadObject(options);
facet[facetName] = value;
}
}
return(facet);
}
/// <summary>
/// Parse JSON into a SearchDocument.
/// </summary>
/// <param name="reader">The JSON reader.</param>
/// <param name="typeToConvert">The type to convert to.</param>
/// <param name="options">Serialization options.</param>
/// <param name="recursionDepth">
/// Depth of the current read recursion to bail out of circular
/// references.
/// </param>
/// <returns>A deserialized SearchDocument.</returns>
public static SearchDocument ReadSearchDocument(
ref Utf8JsonReader reader,
Type typeToConvert,
JsonSerializerOptions options,
int?recursionDepth = null)
{
Debug.Assert(typeToConvert != null);
Debug.Assert(typeToConvert.IsAssignableFrom(typeof(SearchDocument)));
recursionDepth ??= options.GetMaxRecursionDepth();
AssertRecursionDepth(recursionDepth.Value);
SearchDocument doc = new SearchDocument();
reader.Expects(JsonTokenType.StartObject);
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
string propertyName = reader.ExpectsPropertyName();
// Ignore OData properties - we don't expose those on custom
// user schemas
if (!propertyName.StartsWith(Constants.ODataKeyPrefix, StringComparison.OrdinalIgnoreCase))
{
object value = ReadSearchDocObject(ref reader, recursionDepth.Value - 1);
doc[propertyName] = value;
}
else
{
reader.Skip();
}
}
return(doc);
// TODO: #10596 - Investigate using JsonSerializer for reading SearchDocument properties
// The built in converters for JsonSerializer are a little more
// helpful than we want right now and will do things like turn "1"
// to the integer 1 instead of a string. The number of special
// cases needed for converting dynamic documents is small enough
// that we're hard coding them here for now. We'll revisit with
// Search experts and their customer scenarios to get this right in
// the next preview.
object ReadSearchDocObject(ref Utf8JsonReader reader, int depth)
{
AssertRecursionDepth(depth);
switch (reader.TokenType)
{
case JsonTokenType.String:
case JsonTokenType.Number:
case JsonTokenType.True:
case JsonTokenType.False:
case JsonTokenType.None:
case JsonTokenType.Null:
return(ReadPrimitiveValue(ref reader));
case JsonTokenType.StartObject:
// TODO: #10592- Unify on an Azure.Core spatial type
// Return a complex object
return(ReadSearchDocument(ref reader, typeof(SearchDocument), options, depth - 1));
case JsonTokenType.StartArray:
var list = new List <object>();
while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
{
recursionDepth--;
object value = ReadSearchDocObject(ref reader, depth - 1);
list.Add(value);
}
return(list.ToArray());
default:
throw new JsonException();
}
}
}
