public override async Task <object> ReadValueAsync(Stream stream, GraphBinaryReader reader, bool nullable)
{
if (nullable)
{
var valueFlag = await stream.ReadByteAsync().ConfigureAwait(false);
if ((valueFlag & 1) == 1)
{
return(null);
}
}
// Read the byte length of the value bytes
var valueLength = await stream.ReadIntAsync().ConfigureAwait(false);
if (valueLength <= 0)
{
throw new IOException($"Unexpected value length: {valueLength}");
}
if (valueLength > stream.Length)
{
throw new IOException($"Not enough readable bytes: {valueLength} (expected: {stream.Length})");
}
var name = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
var birthDate =
(DateTimeOffset)await reader.ReadValueAsync <DateTimeOffset>(stream, false).ConfigureAwait(false);
return(new SamplePerson(name, birthDate));
}
/// <inheritdoc />
protected override async Task <P> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var operatorName = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
var argsLength = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var args = new object[argsLength];
for (var i = 0; i < argsLength; i++)
{
args[i] = await reader.ReadAsync(stream).ConfigureAwait(false);
}
if (operatorName == "and" || operatorName == "or")
{
return(new P(operatorName, (P)args[0], (P)args[1]));
}
if (operatorName == "not")
{
return(new P(operatorName, (P)args[0]));
}
if (argsLength == 1)
{
if (DataType == DataType.TextP)
{
return(new TextP(operatorName, (string)args[0]));
}
return(new P(operatorName, args[0]));
}
return(new P(operatorName, args));
}
/// <inheritdoc />
protected override async Task <decimal> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var scale = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var unscaled = (BigInteger)await reader.ReadValueAsync <BigInteger>(stream, false).ConfigureAwait(false);
return(ConvertScaleAndUnscaledValue(scale, unscaled));
}
/// <inheritdoc />
protected override async Task <ILambda> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var language = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
var expression = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
// discard the arguments
await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
return(new StringBasedLambda(expression, language));
}
protected override async Task <JanusGraphP> ReadNonNullableValueAsync(Stream stream, GraphBinaryReader reader)
{
var operatorName = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
var value = await reader.ReadAsync(stream).ConfigureAwait(false);
return(new JanusGraphP(operatorName, value));
}
/// <inheritdoc />
protected override async Task <Traverser> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var bulk = (long)await reader.ReadValueAsync <long>(stream, false).ConfigureAwait(false);
var v = await reader.ReadAsync(stream).ConfigureAwait(false);
return(new Traverser(v, bulk));
}
/// <inheritdoc />
protected override async Task <Binding> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var key = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
var value = await reader.ReadAsync(stream).ConfigureAwait(false);
return(new Binding(key, value));
}
/// <inheritdoc />
protected override async Task <BigInteger> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var length = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var bytes = await stream.ReadAsync(length).ConfigureAwait(false);
return(new BigInteger(bytes.Reverse().ToArray()));
}
/// <inheritdoc />
protected override async Task <string> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var length = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var bytes = new byte[length];
await stream.ReadAsync(bytes, 0, length).ConfigureAwait(false);
return(Encoding.UTF8.GetString(bytes));
}
/// <inheritdoc />
protected override async Task <byte[]> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var length = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var buffer = new byte[length];
await stream.ReadAsync(buffer, 0, length).ConfigureAwait(false);
return(buffer);
}
/// <inheritdoc />
protected override async Task <Edge> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var id = await reader.ReadAsync(stream).ConfigureAwait(false);
var label = (string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false);
var inV = new Vertex(await reader.ReadAsync(stream).ConfigureAwait(false),
(string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false));
var outV = new Vertex(await reader.ReadAsync(stream).ConfigureAwait(false),
(string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false));
// discard possible parent vertex
await reader.ReadAsync(stream).ConfigureAwait(false);
// discard possible properties
await reader.ReadAsync(stream).ConfigureAwait(false);
return(new Edge(id, outV, label, inV));
}
/// <inheritdoc />
protected override async Task <Vertex> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var v = new Vertex(await reader.ReadAsync(stream).ConfigureAwait(false),
(string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false));
// discard properties
await reader.ReadAsync(stream).ConfigureAwait(false);
return(v);
}
/// <inheritdoc />
protected override async Task <Property> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var p = new Property((string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false),
await reader.ReadAsync(stream).ConfigureAwait(false));
// discard parent element
await reader.ReadAsync(stream).ConfigureAwait(false);
return(p);
}
/// <inheritdoc />
protected override async Task <TList> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var length = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var result = new TList();
for (var i = 0; i < length; i++)
{
var value = await reader.ReadAsync(stream).ConfigureAwait(false);
var bulk = (long)await reader.ReadValueAsync <long>(stream, false).ConfigureAwait(false);
for (var j = 0; j < bulk; j++)
{
result.Add(value);
}
}
return(result);
}
private static async Task <object[]> ReadArgumentsAsync(Stream stream, GraphBinaryReader reader)
{
var valuesLength = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var values = new object[valuesLength];
for (var i = 0; i < valuesLength; i++)
{
values[i] = await reader.ReadAsync(stream).ConfigureAwait(false);
}
return(values);
}
/// <inheritdoc />
protected override async Task <Bytecode> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var result = new Bytecode();
var stepsLength = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
for (var i = 0; i < stepsLength; i++)
{
result.AddStep((string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false),
await ReadArgumentsAsync(stream, reader).ConfigureAwait(false));
}
var sourcesLength = await stream.ReadIntAsync().ConfigureAwait(false);
for (var i = 0; i < sourcesLength; i++)
{
result.AddSource((string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false),
await ReadArgumentsAsync(stream, reader).ConfigureAwait(false));
}
return(result);
}
/// <inheritdoc />
protected override async Task <TSet> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var length = (int)await reader.ReadValueAsync <int>(stream, false).ConfigureAwait(false);
var result = new TSet();
for (var i = 0; i < length; i++)
{
result.Add((TMember)await reader.ReadAsync(stream).ConfigureAwait(false));
}
return(result);
}
/// <inheritdoc />
protected override async Task <VertexProperty> ReadValueAsync(Stream stream, GraphBinaryReader reader)
{
var vp = new VertexProperty(await reader.ReadAsync(stream).ConfigureAwait(false),
(string)await reader.ReadValueAsync <string>(stream, false).ConfigureAwait(false),
await reader.ReadAsync(stream).ConfigureAwait(false));
// discard the parent vertex
await reader.ReadAsync(stream).ConfigureAwait(false);
// discard the properties
await reader.ReadAsync(stream).ConfigureAwait(false);
return(vp);
}
