src/Npgsql.NodaTime/Internal/DateIntervalConverter.cs - main - dev-npgsql/npgsql

src/Npgsql.NodaTime/Internal/DateIntervalConverter.cs

45 строк2 KB

Nino Floris

Introduce bind operation on PgConverter surface (#6566)

11 май 2026, 20:01

11 май 2026, 20:010f4cfd8

using System;
using System.Threading;
using System.Threading.Tasks;
using NodaTime;
using Npgsql.Internal;
using NpgsqlTypes;

namespace Npgsql.NodaTime.Internal;

public class DateIntervalConverter(PgConverter<NpgsqlRange<LocalDate>> rangeConverter, bool dateTimeInfinityConversions)
    : PgStreamingConverter<DateInterval>
{
    public override DateInterval Read(PgReader reader)
        => Read(async: false, reader, CancellationToken.None).GetAwaiter().GetResult();

    public override ValueTask<DateInterval> ReadAsync(PgReader reader, CancellationToken cancellationToken = default)
        => Read(async: true, reader, cancellationToken);

    async ValueTask<DateInterval> Read(bool async, PgReader reader, CancellationToken cancellationToken)
    {
        var range = async
            ? await rangeConverter.ReadAsync(reader, cancellationToken).ConfigureAwait(false)
            // ReSharper disable once MethodHasAsyncOverloadWithCancellation
            : rangeConverter.Read(reader);

        if (range.IsEmpty)
            throw new InvalidCastException("Cannot read an empty range as a NodaTime DateInterval.");

        var upperBound = range.UpperBound;

        if (upperBound != LocalDate.MaxIsoValue || !dateTimeInfinityConversions)
            upperBound -= Period.FromDays(1);

        return new(range.LowerBound, upperBound);
    }

    protected override Size BindValue(in BindContext context, DateInterval value, ref object? writeState)
        => rangeConverter.Bind(context, new NpgsqlRange<LocalDate>(value.Start, value.End), ref writeState);

    public override void Write(PgWriter writer, DateInterval value)
        => rangeConverter.Write(writer, new NpgsqlRange<LocalDate>(value.Start, value.End));

    public override ValueTask WriteAsync(PgWriter writer, DateInterval value, CancellationToken cancellationToken = default)
        => rangeConverter.WriteAsync(writer, new NpgsqlRange<LocalDate>(value.Start, value.End), cancellationToken);
}