public override ValueTask <T> Read(NpgsqlReadBuffer buffer, int length, bool async, FieldDescription?fieldDescription = null)
{
Initialize();
return(_constructorHandler is null
? ReadUsingMemberHandlers()
: _constructorHandler.Read(buffer, async));
async ValueTask <T> ReadUsingMemberHandlers()
{
await buffer.Ensure(sizeof(int), async);
var fieldCount = buffer.ReadInt32();
if (fieldCount != _memberHandlers.Length)
{
throw new InvalidOperationException($"pg_attributes contains {_memberHandlers.Length} fields for type {PgDisplayName}, but {fieldCount} fields were received.");
}
if (IsValueType <T> .Value)
{
var composite = new ByReference <T> {
Value = _constructor()
};
foreach (var member in _memberHandlers)
{
await member.Read(composite, buffer, async);
}
return(composite.Value);
}
else
{
var composite = _constructor();
foreach (var member in _memberHandlers)
{
await member.Read(composite, buffer, async);
}
return(composite);
}
}
}
public override ValueTask Read(ByReference <TComposite> composite, NpgsqlReadBuffer buffer, bool async, CancellationToken cancellationToken = default) => throw new NotSupportedException();
void Set(ByReference <TComposite> composite, TMember value)
{
_set !(ref composite.Value, value);
}
public abstract ValueTask Read(ByReference <TComposite> composite, NpgsqlReadBuffer buffer, bool async, CancellationToken cancellationToken = default);
public override ValueTask Read(ByReference <TComposite> composite, NpgsqlReadBuffer buffer, bool async) => throw new NotSupportedException();
public abstract ValueTask Read(ByReference <TComposite> composite, NpgsqlReadBuffer buffer, bool async);