mono/mcs/class/System.Web.DynamicData/Test/ModelProviders/DynamicDataContainerTableProvider.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Web;
using System.Web.DynamicData;
using System.Web.DynamicData.ModelProviders;

using MonoTests.DataSource;

namespace MonoTests.ModelProviders
{
    public class DynamicDataContainerTableProvider : TableProvider
    {
        ReadOnlyCollection<ColumnProvider> columns;
        DynamicDataTable table;

        public DynamicDataContainerTableProvider (DynamicDataContainerModelProvider owner, DynamicDataTable table)
            : base (owner)
        {
            if (table == null)
                throw new ArgumentNullException ("table");

            this.EntityType = table.DataType;
            this.Name = table.Name;
            this.table = table;
        }

        public override ReadOnlyCollection<ColumnProvider> Columns
        {
            get {
                if (columns != null)
                    return columns;

                columns = LoadColumns ();
                return columns;
            }
        }

        public override IQueryable GetQuery (object context)
        {
            throw new NotImplementedException ();
        }

        ReadOnlyCollection<ColumnProvider> LoadColumns ()
        {
            List<DynamicDataColumn> containerColumns = table.GetColumns ();

            if (containerColumns == null || containerColumns.Count == 0)
                return new ReadOnlyCollection<ColumnProvider> (new List<ColumnProvider> ());

            var columns = new List <ColumnProvider> ();
            foreach (var column in containerColumns)
                columns.Add (new DynamicDataContainerColumnProvider (this, column));

            return new ReadOnlyCollection<ColumnProvider> (columns);
        }
    }
}