public static TokenSet DeserializeTokenSet(this DeserializeContext context, ref ReadOnlySpan <byte> buffer)
{
var builder = new TokenSet.Builder();
var count = context.ReadInt32(ref buffer);
for (var i = 0; i < count; i++)
{
var word = context.ReadString(ref buffer);
builder.Insert(word);
}
return(builder.Root);
}
public override Index Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
InvertedIndex?invertedIndex = null;
Dictionary <string, Vector>?fieldVectors = null;
Pipeline? pipeline = null;
IEnumerable <string>?fields = null;
var tokenSetBuilder = new TokenSet.Builder();
if (reader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException("An index can only be deserialized from an object.");
}
reader.Read();
while (reader.AdvanceTo(JsonTokenType.PropertyName, JsonTokenType.EndObject) != JsonTokenType.EndObject)
{
string propertyName = reader.ReadValue <string>(options);
switch (propertyName)
{
case "version":
var parsedVersion = Version.Parse(reader.ReadValue <string>(options));
if (parsedVersion.Major != Version.Major || parsedVersion.Minor != Version.Minor)
{
System.Diagnostics.Debug.Write($"Version mismatch when loading serialised index. Current version of Lunr '{VersionString}' does not match serialized index '{parsedVersion}'");
}
break;
case "invertedIndex":
invertedIndex = reader.ReadValue <InvertedIndex>(options);
break;
case "fieldVectors":
fieldVectors = reader.ReadDictionaryFromKeyValueSequence <Vector>(options);
break;
case "pipeline":
pipeline = new Pipeline(reader.ReadArray <string>(options));
break;
case "fields":
fields = reader.ReadArray <string>(options);
break;
}
}
if (invertedIndex is null)
{
throw new JsonException("Serialized index is missing invertedIndex.");
}
if (fieldVectors is null)
{
throw new JsonException("Serialized index is missing fieldVectors.");
}
if (pipeline is null)
{
throw new JsonException("Serialized index is missing a pipeline.");
}
if (fields is null)
{
throw new JsonException("Serialized index is missing a list of fields.");
}
foreach (string term in invertedIndex.Keys)
{
tokenSetBuilder.Insert(term);
}
tokenSetBuilder.Finish();
return(new Index(invertedIndex, fieldVectors, tokenSetBuilder.Root, fields, pipeline));
}