private static JsonDocument CreateForLiteral(JsonTokenType tokenType)
{
switch (tokenType)
{
case JsonTokenType.False:
s_falseLiteral ??= Create(JsonConstants.FalseValue.ToArray());
return(s_falseLiteral);
case JsonTokenType.True:
s_trueLiteral ??= Create(JsonConstants.TrueValue.ToArray());
return(s_trueLiteral);
default:
Debug.Assert(tokenType == JsonTokenType.Null);
s_nullLiteral ??= Create(JsonConstants.NullValue.ToArray());
return(s_nullLiteral);
}
JsonDocument Create(byte[] utf8Json)
{
MetadataDb database = MetadataDb.CreateLocked(utf8Json.Length);
database.Append(tokenType, startLocation: 0, utf8Json.Length);
return(new JsonDocument(utf8Json, database));
}
}
private static JsonDocument ParseUnrented(
ReadOnlyMemory <byte> utf8Json,
JsonReaderOptions readerOptions,
JsonTokenType tokenType = JsonTokenType.None)
{
// These tokens should already have been processed.
Debug.Assert(
tokenType != JsonTokenType.Null &&
tokenType != JsonTokenType.False &&
tokenType != JsonTokenType.True);
ReadOnlySpan <byte> utf8JsonSpan = utf8Json.Span;
MetadataDb database;
if (tokenType == JsonTokenType.String || tokenType == JsonTokenType.Number)
{
// For primitive types, we can avoid renting MetadataDb and creating StackRowStack.
database = MetadataDb.CreateLocked(utf8Json.Length);
StackRowStack stack = default;
Parse(utf8JsonSpan, readerOptions, ref database, ref stack);
}
else
{
database = MetadataDb.CreateRented(utf8Json.Length, convertToAlloc: true);
var stack = new StackRowStack(JsonDocumentOptions.DefaultMaxDepth * StackRow.Size);
try
{
Parse(utf8JsonSpan, readerOptions, ref database, ref stack);
}
finally
{
stack.Dispose();
}
}
return(new JsonDocument(utf8Json, database));
}