/// <summary>
/// 获取数据读写器中指定键的值的类型。
/// </summary>
/// <typeparam name="TKey">键类型</typeparam>
/// <param name="dataRW">数据读写器</param>
/// <param name="key">指定键</param>
/// <returns>返回一个类型</returns>
public static Type GetItemType <TKey>(IDataRW <TKey> dataRW, TKey key)
{
var auxiliary = new AuxiliaryValueRW();
dataRW.OnReadValue(key, auxiliary);
return(auxiliary.GetValueType());
}
/// <summary>
/// 获取数据读写器中指定键的值的类型。
/// </summary>
/// <typeparam name="TKey">键类型</typeparam>
/// <param name="dataRW">数据读写器</param>
/// <param name="key">指定键</param>
/// <returns>返回一个类型</returns>
public static Type GetItemType <TKey>(IDataRW <TKey> dataRW, TKey key)
{
var auxiliary = new AuxiliaryValueRW();
if (typeof(TKey) == typeof(long) && ((dataRW as IAsDataReader)?.Content ?? dataRW) is IId64DataRW id64DataRW)
{
id64DataRW.OnReadValue(Unsafe.As <TKey, long>(ref key), auxiliary);
}
else
{
dataRW.OnReadValue(key, auxiliary);
}
return(auxiliary.GetType());
}
/// <summary>
/// 转换键，并将该键对应的值写入到值写入器中。
/// </summary>
/// <param name="key">指定键</param>
/// <param name="valueWriter">值写入器</param>
public void OnReadValue(TOut key, IValueWriter valueWriter)
{
dataRW.OnReadValue(XConvert <TOut, TIn> .Convert(key), valueWriter);
}