internal static ReadOnlySpan <byte> GetPropertyName(
ref ReadStack state,
ref Utf8JsonReader reader,
JsonSerializerOptions options)
{
ReadOnlySpan <byte> unescapedPropertyName;
ReadOnlySpan <byte> propertyName = reader.GetSpan();
if (reader.ValueIsEscaped)
{
unescapedPropertyName = JsonReaderHelper.GetUnescapedSpan(propertyName);
}
else
{
unescapedPropertyName = propertyName;
}
if (state.Current.CanContainMetadata)
{
if (IsMetadataPropertyName(propertyName, state.Current.BaseJsonTypeInfo.PolymorphicTypeResolver))
{
ThrowHelper.ThrowUnexpectedMetadataException(propertyName, ref reader, ref state);
}
}
return(unescapedPropertyName);
}
internal static ReadOnlySpan <byte> GetPropertyName(
ref ReadStack state,
ref Utf8JsonReader reader,
JsonSerializerOptions options)
{
ReadOnlySpan <byte> unescapedPropertyName;
ReadOnlySpan <byte> propertyName = reader.GetSpan();
if (reader._stringHasEscaping)
{
int idx = propertyName.IndexOf(JsonConstants.BackSlash);
Debug.Assert(idx != -1);
unescapedPropertyName = JsonReaderHelper.GetUnescapedSpan(propertyName, idx);
}
else
{
unescapedPropertyName = propertyName;
}
if (state.CanContainMetadata)
{
if (propertyName.Length > 0 && propertyName[0] == '$')
{
ThrowHelper.ThrowUnexpectedMetadataException(propertyName, ref reader, ref state);
}
}
return(unescapedPropertyName);
}
internal static JsonPropertyInfo LookupProperty(
object obj,
ref Utf8JsonReader reader,
JsonSerializerOptions options,
ref ReadStack state,
out bool useExtensionProperty)
{
Debug.Assert(state.Current.JsonClassInfo.ClassType == ClassType.Object);
JsonPropertyInfo jsonPropertyInfo;
ReadOnlySpan <byte> unescapedPropertyName;
ReadOnlySpan <byte> propertyName = reader.GetSpan();
if (reader._stringHasEscaping)
{
int idx = propertyName.IndexOf(JsonConstants.BackSlash);
Debug.Assert(idx != -1);
unescapedPropertyName = JsonReaderHelper.GetUnescapedSpan(propertyName, idx);
}
else
{
unescapedPropertyName = propertyName;
}
if (options.ReferenceHandling.ShouldReadPreservedReferences())
{
if (propertyName.Length > 0 && propertyName[0] == '$')
{
ThrowHelper.ThrowUnexpectedMetadataException(propertyName, ref reader, ref state);
}
}
jsonPropertyInfo = state.Current.JsonClassInfo.GetProperty(unescapedPropertyName, ref state.Current);
// Increment PropertyIndex so GetProperty() starts with the next property the next time this function is called.
state.Current.PropertyIndex++;
// Determine if we should use the extension property.
if (jsonPropertyInfo == JsonPropertyInfo.s_missingProperty)
{
JsonPropertyInfo?dataExtProperty = state.Current.JsonClassInfo.DataExtensionProperty;
if (dataExtProperty != null)
{
state.Current.JsonPropertyNameAsString = JsonHelpers.Utf8GetString(unescapedPropertyName);
CreateDataExtensionProperty(obj, dataExtProperty);
jsonPropertyInfo = dataExtProperty;
}
state.Current.JsonPropertyInfo = jsonPropertyInfo;
useExtensionProperty = true;
return(jsonPropertyInfo);
}
// Support JsonException.Path.
Debug.Assert(
jsonPropertyInfo.JsonPropertyName == null ||
options.PropertyNameCaseInsensitive ||
unescapedPropertyName.SequenceEqual(jsonPropertyInfo.JsonPropertyName));
state.Current.JsonPropertyInfo = jsonPropertyInfo;
if (jsonPropertyInfo.JsonPropertyName == null)
{
byte[] propertyNameArray = unescapedPropertyName.ToArray();
if (options.PropertyNameCaseInsensitive)
{
// Each payload can have a different name here; remember the value on the temporary stack.
state.Current.JsonPropertyName = propertyNameArray;
}
else
{
// Prevent future allocs by caching globally on the JsonPropertyInfo which is specific to a Type+PropertyName
// so it will match the incoming payload except when case insensitivity is enabled (which is handled above).
state.Current.JsonPropertyInfo.JsonPropertyName = propertyNameArray;
}
}
state.Current.JsonPropertyInfo = jsonPropertyInfo;
useExtensionProperty = false;
return(jsonPropertyInfo);
}
