/// <inheritdoc />
public override int GetObjectPropertyCount(IJsonNavigatorNode objectNode)
{
ReadOnlyMemory <byte> buffer = JsonBinaryNavigator.GetNodeOfType(
JsonNodeType.Object,
objectNode);
byte typeMarker = buffer.Span[0];
int firstObjectPropertyOffset = JsonBinaryEncoding.GetFirstValueOffset(typeMarker);
long count;
switch (typeMarker)
{
// Empty and Single Object
case JsonBinaryEncoding.TypeMarker.EmptyObject:
count = 0;
break;
case JsonBinaryEncoding.TypeMarker.SinglePropertyObject:
// This number gets divided by 2 later.
count = 2;
break;
// Object with length and count prefix
case JsonBinaryEncoding.TypeMarker.Object1ByteLengthAndCount:
count = MemoryMarshal.Read <byte>(buffer
.Slice(JsonBinaryEncoding.TypeMarkerLength + JsonBinaryEncoding.OneByteLength).Span);
break;
case JsonBinaryEncoding.TypeMarker.Object2ByteLengthAndCount:
count = MemoryMarshal.Read <ushort>(buffer
.Slice(JsonBinaryEncoding.TypeMarkerLength + JsonBinaryEncoding.TwoByteLength).Span);
break;
case JsonBinaryEncoding.TypeMarker.Object4ByteLengthAndCount:
count = MemoryMarshal.Read <uint>(buffer
.Slice(JsonBinaryEncoding.TypeMarkerLength + JsonBinaryEncoding.FourByteLength).Span);
break;
// Object with length prefix
case JsonBinaryEncoding.TypeMarker.Object1ByteLength:
case JsonBinaryEncoding.TypeMarker.Object2ByteLength:
case JsonBinaryEncoding.TypeMarker.Object4ByteLength:
count = JsonBinaryNavigator.GetValueCount(buffer.Slice(firstObjectPropertyOffset).Span);
break;
default:
throw new InvalidOperationException($"Unexpected object type marker: {typeMarker}");
}
// Divide by 2 since the count includes fieldname and value as seperate entities
count = count / 2;
if (count > int.MaxValue)
{
throw new InvalidOperationException("count can not be more than int.MaxValue");
}
return((int)count);
}
/// <inheritdoc />
public override int GetArrayItemCount(IJsonNavigatorNode arrayNode)
{
ReadOnlyMemory <byte> buffer = JsonBinaryNavigator.GetNodeOfType(
JsonNodeType.Array,
arrayNode);
byte typeMarker = buffer.Span[0];
int firstValueOffset = JsonBinaryEncoding.GetFirstValueOffset(typeMarker);
long count;
switch (typeMarker)
{
// Empty and Single Array
case JsonBinaryEncoding.TypeMarker.EmptyArray:
count = 0;
break;
case JsonBinaryEncoding.TypeMarker.SingleItemArray:
count = 1;
break;
// Arrays with length and count prefix
case JsonBinaryEncoding.TypeMarker.Array1ByteLengthAndCount:
count = MemoryMarshal.Read <byte>(buffer
.Slice(JsonBinaryEncoding.TypeMarkerLength + JsonBinaryEncoding.OneByteLength).Span);
break;
case JsonBinaryEncoding.TypeMarker.Array2ByteLengthAndCount:
count = MemoryMarshal.Read <ushort>(buffer
.Slice(JsonBinaryEncoding.TypeMarkerLength + JsonBinaryEncoding.TwoByteLength).Span);
break;
case JsonBinaryEncoding.TypeMarker.Array4ByteLengthAndCount:
count = MemoryMarshal.Read <uint>(buffer
.Slice(JsonBinaryEncoding.TypeMarkerLength + JsonBinaryEncoding.FourByteLength).Span);
break;
// Arrays with length prefix
case JsonBinaryEncoding.TypeMarker.Array1ByteLength:
case JsonBinaryEncoding.TypeMarker.Array2ByteLength:
case JsonBinaryEncoding.TypeMarker.Array4ByteLength:
count = JsonBinaryNavigator.GetValueCount(buffer.Slice(firstValueOffset).Span);
break;
default:
throw new InvalidOperationException($"Unexpected array type marker: {typeMarker}");
}
if (count > int.MaxValue)
{
throw new InvalidOperationException("count can not be more than int.MaxValue");
}
return((int)count);
}
