/// <summary>
/// Test whether <paramref name="model"/> has feature <typeparamref name="TFeature"/>.
/// </summary>
/// <typeparam name="TFeature">Type of required feature.</typeparam>
/// <param name="condition">Ensure condition helper.</param>
/// <param name="model">Model test feature on.</param>
/// <exception cref="ArgumentOutOfRangeException">When <paramref name="model"/> doesn't have feature of type <typeparamref name="TFeature"/>.</exception>
public static void HasFeature <TFeature>(this EnsureConditionHelper condition, IFeatureModel model)
{
Ensure.NotNull(condition, "condition");
Ensure.NotNull(model, "model");
TFeature feature;
if (!model.TryWith(out feature))
{
throw Ensure.Exception.ArgumentOutOfRange("model", "Feature of type '{0}' is required on '{1}'.", typeof(TFeature).FullName, model);
}
}
/// <summary>
/// Tries to retrieve object of type <typeparamref name="TFeature"/>.
/// If this is not possible, throws <see cref="NotSupportedException"/>/
/// </summary>
/// <typeparam name="TFeature">Type of feature to retrieve.</typeparam>
/// <param name="model">Feature model.</param>
/// <returns>Feature of type <typeparamref name="TFeature"/>.</returns>
/// <exception cref="NotSupportedException">If <paramref name="model"/> doesn't support feature of type <typeparamref name="TFeature"/>.</exception>
public static TFeature With <TFeature>(this IFeatureModel model)
{
Ensure.NotNull(model, "model");
TFeature feature;
if (model.TryWith(out feature))
{
return(feature);
}
throw Ensure.Exception.NotSupported(
"Feature model '{0}' doesn't support feature '{1}'.",
model.GetType().FullName,
typeof(TFeature).FullName
);
}