/// <summary>
/// Initialize a `DataReaderLoadResult` using the state of another one.
/// </summary>
protected DataReaderLoadResult(DataReaderLoadResult <T> fromOtherResult)
{
if (fromOtherResult == null)
{
throw new ArgumentNullException(nameof(fromOtherResult));
}
if (fromOtherResult.IsError)
{
IsError = true;
ExceptionInfo = fromOtherResult.ExceptionInfo;
_value = default(T); // can't use fromOtherResult.Value because it will throw an exception
IsValuePresent = false;
}
else
{
_value = fromOtherResult.Value;
IsValuePresent = fromOtherResult.IsValuePresent;
IsError = false;
}
}
private DataReaderLoadResult <T> GetAdjustedReadResult(DataReaderLoadResult <T> result)
{
// Check for error condition
if (result.IsError && CheckMode(DefaultValueDataPersisterDecoratorMode.ReadErrorToCustomDefault))
{
return(new DataReaderLoadResult <T>(_customDefaultValue));
}
// Check for empty condition
if (!result.IsValuePresent && CheckMode(DefaultValueDataPersisterDecoratorMode.ReadEmptyToCustomDefault))
{
return(new DataReaderLoadResult <T>(_customDefaultValue));
}
// Check for value present condition where condition == default(T) -- using supplied EqualityComparer, obviously
if (CheckMode(DefaultValueDataPersisterDecoratorMode.ReadDefaultToCustomDefault) && _comparer.Equals(result.Value, default(T)))
{
return(new DataReaderLoadResult <T>(_customDefaultValue));
}
// The original result could be used "as-is"
return(result);
}
/// <summary>
/// Create an instance from a load result
/// </summary>
public DataPersisterTransactionContext(DataReaderLoadResult <T> fromResult) : base(fromResult)
{
}
/// <summary>
/// ctor using a DataReaderLoadResult<T> as result state
/// </summary>
public DataPersisterUpdateResult(DataReaderLoadResult <T> result, bool isUpdated) : base(result)
{
IsUpdated = isUpdated;
}
