/// <summary>
/// Clone <see cref="ILineKey"/> parts.
/// </summary>
/// <param name="line"></param>
/// <param name="appender">(optional) appender to use for clone. If null uses the appender of <paramref name="line"/></param>
/// <param name="parameterInfos">(optional) for checking which parameters are keys</param>
/// <returns>clone of key parts</returns>
/// <exception cref="LineException">If cloning failed.</exception>
public static ILine CloneKey(this ILine line, ILineFactory appender = default, IParameterInfos parameterInfos = null)
{
if (appender == null)
{
appender = line.GetAppender();
}
ILine result = null;
if (parameterInfos == null)
{
appender.TryGetParameterInfos(out parameterInfos);
}
StructList16 <ILine> args = new StructList16 <ILine>();
for (ILine l = line; l != null; l = l.GetPreviousPart())
{
if (l is ILineArgument || l is ILineArgumentEnumerable)
{
args.Add(l);
}
}
for (int i = args.Count - 1; i >= 0; i--)
{
ILine l = args[i];
if (l is ILineParameterEnumerable lineParameters)
{
foreach (ILineParameter lineParameter in lineParameters)
{
if (lineParameter.IsCanonicalKey(parameterInfos))
{
result = appender.Create <ILineCanonicalKey, string, string>(result, lineParameter.ParameterName, lineParameter.ParameterValue);
}
else if (lineParameter.IsNonCanonicalKey(parameterInfos))
{
result = appender.Create <ILineNonCanonicalKey, string, string>(result, lineParameter.ParameterName, lineParameter.ParameterValue);
}
}
}
if (l is ILineParameter parameter)
{
if (parameter.IsCanonicalKey(parameterInfos))
{
result = appender.Create <ILineCanonicalKey, string, string>(result, parameter.ParameterName, parameter.ParameterValue);
}
else if (parameter.IsNonCanonicalKey(parameterInfos))
{
result = appender.Create <ILineNonCanonicalKey, string, string>(result, parameter.ParameterName, parameter.ParameterValue);
}
}
}
return(result ?? appender.Create <ILinePart>(null));
}