/// <summary>
/// Initializes a new instance of the <see cref="CSF.Zpt.ExpressionEvaluators.PathExpressions.PathComponent"/> class.
/// </summary>
/// <param name="parts">Parts.</param>
internal PathComponent(PathPart[] parts)
{
if(parts == null)
{
throw new ArgumentNullException(nameof(parts));
}
_parts = new ReadOnlyCollection<PathPart>(parts);
}
/// <summary>
/// Attempts to get a part-name for traversal, expanding interpolated part-names if appropriate.
/// </summary>
/// <returns><c>true</c>, if a part name was resolved, <c>false</c> otherwise.</returns>
/// <param name="part">A TALES path part.</param>
/// <param name="context">The rendering context.</param>
/// <param name="model">The TALES model.</param>
/// <param name="result">Exposes the result of this operation.</param>
private bool TryGetPartName(PathPart part, IRenderingContext context, ITalesModel model, out string result)
{
result = part.Value;
bool output = true;
if(part.IsInterpolated)
{
object interpolatedValue;
if(model.TryGetRootObject(result, context, out interpolatedValue)
&& interpolatedValue != null)
{
output = true;
result = interpolatedValue.ToString();
}
else
{
output = false;
result = null;
}
}
return output;
}