/// <summary>
/// Adds a new hierarchical column to the builder with the given
/// configuration, projection, and info providers.
/// </summary>
/// <typeparam name="T">
/// The <see cref="Type"/> of data being projected.
/// </typeparam>
/// <param name="self">
/// The builder instance.
/// </param>
/// <param name="column">
/// The column configuration the added column is to have.
/// </param>
/// <param name="projection">
/// The projection the added column is to have.
/// </param>
/// <param name="collectionProvider">
/// The collection provider for the column.
/// </param>
/// <returns>
/// The builder instance.
/// </returns>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="collectionProvider"/> is <c>null</c>.
/// - or -
/// <paramref name="column"/> is <c>null</c>.
/// - or -
/// <paramref name="projection"/> is <c>null</c>.
/// - or -
/// <paramref name="self"/> is <c>null</c>.
/// </exception>
public static ITableBuilderWithRowCount AddHierarchicalColumn <T>(
this ITableBuilderWithRowCount self,
ColumnConfiguration column,
IProjection <int, T> projection,
ICollectionInfoProvider <T> collectionProvider)
{
Guard.NotNull(self, nameof(self));
Guard.NotNull(projection, nameof(projection));
Guard.NotNull(collectionProvider, nameof(collectionProvider));
return(self.AddColumn(new HierarchicalDataColumn <T>(column, projection, collectionProvider)));
}
/// <summary>
/// Initializes a new instance of the <see cref="HierarchicalDataColumn{T}"/>
/// class.
/// </summary>
/// <param name="configuration">
/// The configuration of this column.
/// </param>
/// <param name="projection">
/// The projection that projects the data in the column.
/// </param>
/// <param name="collectionProvider">
/// The providers that define how to display the hierarchical data.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="configuration"/> is <c>null</c>.
/// - or -
/// <paramref name="projection"/> is <c>null</c>.
/// - or -
/// <paramref name="collectionProvider"/> is <c>null</c>.
/// </exception>
public HierarchicalDataColumn(
ColumnConfiguration configuration,
IProjection <int, T> projection,
ICollectionInfoProvider <T> collectionProvider)
: base(configuration, projection)
{
Guard.NotNull(collectionProvider, nameof(collectionProvider));
Type collectionOutputType = null;
foreach (var i in collectionProvider.GetType().GetInterfaces())
{
if (i.IsGenericType)
{
var genericInterface = i.GetGenericTypeDefinition();
if (genericInterface == typeof(ICollectionAccessProvider <,>))
{
Type collectionInputType = i.GetGenericArguments()[0];
collectionOutputType = i.GetGenericArguments()[1];
if (collectionInputType != typeof(T))
{
throw new InvalidOperationException(
$"TCollection on the ICollectionAccessProvider<TCollection, TElement>implemented on " +
$"{nameof(collectionProvider)} doesn't match T of {nameof(HierarchicalDataColumn<T>)} from column " +
$"{configuration.Metadata.Guid}. TCollection = {collectionInputType.Name}, T = {typeof(T).Name}");
}
break;
}
}
}
if (collectionOutputType == null)
{
throw new InvalidOperationException(
$"No valid ICollectionAccessProvider<,> found on {nameof(HierarchicalDataColumn<T>)} {configuration.Metadata.Guid}.");
}
this.CollectionInfoProvider = collectionProvider;
}