dev-npgsql/npgsql: Npgsql is the .NET data provider for PostgreSQL.

src/Npgsql.NodaTime/Internal/LegacyTimestampHandler.cs
64 строки3 KB
Shay Rojansky
Apply file-scoped namespaces for 6.0 (#4298)
28 янв 2022, 15:13
28 янв 2022, 15:132e0ad2d
using System;
using System.Diagnostics;
using NodaTime;
using Npgsql.BackendMessages;
using Npgsql.Internal;
using Npgsql.Internal.TypeHandling;
using Npgsql.PostgresTypes;
using BclTimestampHandler = Npgsql.Internal.TypeHandlers.DateTimeHandlers.TimestampHandler;

namespace Npgsql.NodaTime.Internal;

sealed partial class LegacyTimestampHandler : NpgsqlSimpleTypeHandler<Instant>,
    INpgsqlSimpleTypeHandler<LocalDateTime>, INpgsqlSimpleTypeHandler<DateTime>, INpgsqlSimpleTypeHandler<long>
{
    readonly BclTimestampHandler _bclHandler;

    internal LegacyTimestampHandler(PostgresType postgresType)
        : base(postgresType)
        => _bclHandler = new BclTimestampHandler(postgresType);

    #region Read

    public override Instant Read(NpgsqlReadBuffer buf, int len, FieldDescription? fieldDescription = null)
        => TimestampTzHandler.ReadInstant(buf);

    LocalDateTime INpgsqlSimpleTypeHandler<LocalDateTime>.Read(NpgsqlReadBuffer buf, int len, FieldDescription? fieldDescription)
        => TimestampHandler.ReadLocalDateTime(buf);

    DateTime INpgsqlSimpleTypeHandler<DateTime>.Read(NpgsqlReadBuffer buf, int len, FieldDescription? fieldDescription)
        => _bclHandler.Read(buf, len, fieldDescription);

    long INpgsqlSimpleTypeHandler<long>.Read(NpgsqlReadBuffer buf, int len, FieldDescription? fieldDescription)
        => ((INpgsqlSimpleTypeHandler<long>)_bclHandler).Read(buf, len, fieldDescription);

    #endregion Read

    #region Write

    public override int ValidateAndGetLength(Instant value, NpgsqlParameter? parameter)
        => 8;

    int INpgsqlSimpleTypeHandler<LocalDateTime>.ValidateAndGetLength(LocalDateTime value, NpgsqlParameter? parameter)
        => 8;

    public override void Write(Instant value, NpgsqlWriteBuffer buf, NpgsqlParameter? parameter)
        => TimestampTzHandler.WriteInstant(value, buf);

    void INpgsqlSimpleTypeHandler<LocalDateTime>.Write(LocalDateTime value, NpgsqlWriteBuffer buf, NpgsqlParameter? parameter)
        => TimestampHandler.WriteLocalDateTime(value, buf);

    int INpgsqlSimpleTypeHandler<DateTime>.ValidateAndGetLength(DateTime value, NpgsqlParameter? parameter)
        => ((INpgsqlSimpleTypeHandler<DateTime>)_bclHandler).ValidateAndGetLength(value, parameter);

    public int ValidateAndGetLength(long value, NpgsqlParameter? parameter)
        => ((INpgsqlSimpleTypeHandler<long>)_bclHandler).ValidateAndGetLength(value, parameter);

    void INpgsqlSimpleTypeHandler<DateTime>.Write(DateTime value, NpgsqlWriteBuffer buf, NpgsqlParameter? parameter)
        => ((INpgsqlSimpleTypeHandler<DateTime>)_bclHandler).Write(value, buf, parameter);

    void INpgsqlSimpleTypeHandler<long>.Write(long value, NpgsqlWriteBuffer buf, NpgsqlParameter? parameter)
        => ((INpgsqlSimpleTypeHandler<long>)_bclHandler).Write(value, buf, parameter);

    #endregion Write
}