public override async Task WriteValueAsync(object value, Stream stream, GraphBinaryWriter writer, bool nullable)
{
if (value == null)
{
if (!nullable)
{
throw new IOException("Unexpected null value when nullable is false");
}
await writer.WriteValueFlagNullAsync(stream).ConfigureAwait(false);
return;
}
if (nullable)
{
await writer.WriteValueFlagNoneAsync(stream).ConfigureAwait(false);
}
var samplePerson = (SamplePerson)value;
var name = samplePerson.Name;
// value_length = name_byte_length + name_bytes + long
await stream.WriteIntAsync(4 + Encoding.UTF8.GetBytes(name).Length + 8).ConfigureAwait(false);
await writer.WriteValueAsync(name, stream, false).ConfigureAwait(false);
await writer.WriteValueAsync(samplePerson.BirthDate, stream, false).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(decimal value, Stream stream, GraphBinaryWriter writer)
{
var(unscaledValue, scale) = GetUnscaledValueAndScale(value);
await writer.WriteValueAsync(scale, stream, false).ConfigureAwait(false);
await writer.WriteValueAsync(unscaledValue, stream, false).ConfigureAwait(false);
}
public override async Task WriteAsync(object value, Stream stream, GraphBinaryWriter writer)
{
// Write {custom type info}, {value_flag} and {value}
await stream.WriteAsync(_typeInfoBytes).ConfigureAwait(false);
await WriteValueAsync(value, stream, writer, true);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(AbstractTraversalStrategy value, Stream stream,
GraphBinaryWriter writer)
{
await writer.WriteValueAsync(GremlinType.FromFqcn(value.Fqcn), stream, false).ConfigureAwait(false);
await writer.WriteValueAsync(value.Configuration, stream, false).ConfigureAwait(false);
}
protected override async Task WriteNonNullableValueAsync(JanusGraphP value, Stream stream,
GraphBinaryWriter writer)
{
await writer.WriteValueAsync(value.OperatorName, stream, false).ConfigureAwait(false);
await writer.WriteAsync(value.Value, stream).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(string value, Stream stream, GraphBinaryWriter writer)
{
var bytes = Encoding.UTF8.GetBytes(value);
await writer.WriteValueAsync(bytes.Length, stream, false).ConfigureAwait(false);
await stream.WriteAsync(bytes).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(Vertex value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteAsync(value.Id, stream).ConfigureAwait(false);
await writer.WriteValueAsync(value.Label, stream, false).ConfigureAwait(false);
await writer.WriteAsync(null, stream).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(ILambda value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteValueAsync(value.Language, stream, false).ConfigureAwait(false);
await writer.WriteValueAsync(value.LambdaExpression, stream, false).ConfigureAwait(false);
await writer.WriteValueAsync(value.Arguments, stream, false).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(Property value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteValueAsync(value.Key, stream, false).ConfigureAwait(false);
await writer.WriteAsync(value.Value, stream).ConfigureAwait(false);
// placeholder for the parent element
await writer.WriteAsync(null, stream).ConfigureAwait(false);
}
protected override async Task WriteNonNullableValueAsync(RelationIdentifier value, Stream stream,
GraphBinaryWriter writer)
{
await stream.WriteLongAsync(value.OutVertexId).ConfigureAwait(false);
await stream.WriteLongAsync(value.TypeId).ConfigureAwait(false);
await stream.WriteLongAsync(value.RelationId).ConfigureAwait(false);
await stream.WriteLongAsync(value.InVertexId).ConfigureAwait(false);
}
private static async Task WriteInstructionsAsync(IReadOnlyCollection <Instruction> instructions, Stream stream,
GraphBinaryWriter writer)
{
await writer.WriteValueAsync(instructions.Count, stream, false).ConfigureAwait(false);
foreach (var instruction in instructions)
{
await writer.WriteValueAsync(instruction.OperatorName, stream, false).ConfigureAwait(false);
await WriteArgumentsAsync(instruction.Arguments, stream, writer).ConfigureAwait(false);
}
}
/// <inheritdoc />
protected override async Task WriteValueAsync(TSet value, Stream stream, GraphBinaryWriter writer)
{
var enumerable = (IEnumerable)value;
var list = enumerable.Cast <object>().ToList();
await writer.WriteValueAsync(list.Count, stream, false).ConfigureAwait(false);
foreach (var item in list)
{
await writer.WriteAsync(item, stream).ConfigureAwait(false);
}
}
/// <inheritdoc />
protected override async Task WriteValueAsync(Type value, Stream stream, GraphBinaryWriter writer)
{
if (typeof(AbstractTraversalStrategy).IsAssignableFrom(value))
{
var strategyInstance = (AbstractTraversalStrategy)Activator.CreateInstance(value);
await writer.WriteValueAsync(strategyInstance.Fqcn, stream, false).ConfigureAwait(false);
}
else
{
throw new IOException("Currently, writing of Types is only supported for traversal strategies.");
}
}
/// <inheritdoc />
protected override async Task WriteValueAsync(Edge value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteAsync(value.Id, stream).ConfigureAwait(false);
await writer.WriteValueAsync(value.Label, stream, false).ConfigureAwait(false);
await writer.WriteAsync(value.InV.Id, stream).ConfigureAwait(false);
await writer.WriteValueAsync(value.InV.Label, stream, false).ConfigureAwait(false);
await writer.WriteAsync(value.OutV.Id, stream).ConfigureAwait(false);
await writer.WriteValueAsync(value.OutV.Label, stream, false).ConfigureAwait(false);
// Placeholder for the parent vertex
await writer.WriteAsync(null, stream).ConfigureAwait(false);
// placeholder for the properties
await writer.WriteAsync(null, stream).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(Guid value, Stream stream, GraphBinaryWriter writer)
{
var bytes = value.ToByteArray();
// first 4 bytes in reverse order:
await stream.WriteByteAsync(bytes[3]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[2]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[1]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[0]).ConfigureAwait(false);
// 2 bytes in reverse order:
await stream.WriteByteAsync(bytes[5]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[4]).ConfigureAwait(false);
// 3 bytes in reverse order:
await stream.WriteByteAsync(bytes[7]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[6]).ConfigureAwait(false);
// 3 bytes:
await stream.WriteByteAsync(bytes[8]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[9]).ConfigureAwait(false);
// last 6 bytes:
await stream.WriteByteAsync(bytes[10]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[11]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[12]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[13]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[14]).ConfigureAwait(false);
await stream.WriteByteAsync(bytes[15]).ConfigureAwait(false);
}
/// <inheritdoc />
public async Task WriteValueAsync(object value, Stream stream, GraphBinaryWriter writer, bool nullable)
{
if (value == null)
{
if (!nullable)
{
throw new IOException("Unexpected null value when nullable is false");
}
await writer.WriteValueFlagNullAsync(stream).ConfigureAwait(false);
return;
}
if (nullable)
{
await writer.WriteValueFlagNoneAsync(stream).ConfigureAwait(false);
}
await WriteValueAsync((T)value, stream, writer).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(P value, Stream stream, GraphBinaryWriter writer)
{
ICollection args = value.Value is ICollection ? value.Value : new List <object> {
value.Value
};
var argsLength = value.Other == null ? args.Count : args.Count + 1;
await writer.WriteValueAsync(value.OperatorName, stream, false).ConfigureAwait(false);
await writer.WriteValueAsync(argsLength, stream, false).ConfigureAwait(false);
foreach (var arg in args)
{
await writer.WriteAsync(arg, stream).ConfigureAwait(false);
}
if (value.Other != null)
{
await writer.WriteAsync(value.Other, stream).ConfigureAwait(false);
}
}
/// <inheritdoc />
protected override async Task WriteValueAsync(T value, Stream stream, GraphBinaryWriter writer)
{
await _writeFunc.Invoke(value, stream).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(TEnum value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteAsync(value.EnumValue, stream).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(DateTimeOffset value, Stream stream, GraphBinaryWriter writer)
{
await stream.WriteLongAsync(value.ToUnixTimeMilliseconds()).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(TMember[] value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteValueAsync(value.Length, stream, false).ConfigureAwait(false);
foreach (var item in value)
{
await writer.WriteAsync(item, stream).ConfigureAwait(false);
}
}
/// <inheritdoc />
protected override async Task WriteValueAsync(Binding value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteValueAsync(value.Key, stream, false).ConfigureAwait(false);
await writer.WriteAsync(value.Value, stream).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(char value, Stream stream, GraphBinaryWriter writer)
{
var bytes = Encoding.UTF8.GetBytes(value.ToString());
await stream.WriteAsync(bytes).ConfigureAwait(false);
}
/// <inheritdoc /> public abstract Task WriteValueAsync(object value, Stream stream, GraphBinaryWriter writer, bool nullable);
/// <inheritdoc />
protected override async Task WriteValueAsync(BigInteger value, Stream stream, GraphBinaryWriter writer)
{
var bytes = value.ToByteArray().Reverse().ToArray();
await writer.WriteValueAsync(bytes.Length, stream, false).ConfigureAwait(false);
await stream.WriteAsync(bytes).ConfigureAwait(false);
}
/// <inheritdoc />
protected override async Task WriteValueAsync(ITraversal value, Stream stream, GraphBinaryWriter writer)
{
await writer.WriteValueAsync(value.Bytecode, stream, false).ConfigureAwait(false);
}
/// <inheritdoc />
public async Task WriteAsync(object value, Stream stream, GraphBinaryWriter writer)
{
await WriteValueAsync((T)value, stream, writer, true).ConfigureAwait(false);
}
/// <summary>
/// Currently not supported.
/// </summary>
protected override Task WriteValueAsync(TList value, Stream stream, GraphBinaryWriter writer)
{
throw new System.NotImplementedException("Writing a BulkSet is not supported");
}
/// <summary> /// Writes a non-nullable value into a stream. /// </summary> /// <param name="value">The value to write.</param> /// <param name="stream">The stream to write to.</param> /// <param name="writer">A <see cref="GraphBinaryWriter"/>.</param> /// <returns>A task that represents the asynchronous write operation.</returns> protected abstract Task WriteValueAsync(T value, Stream stream, GraphBinaryWriter writer);
/// <inheritdoc /> public abstract Task WriteAsync(object value, Stream stream, GraphBinaryWriter writer);
