ODataSourcePage

public class ODataDataSourcePage
   : IDataSourcePage
{
    IDictionary<string, object>[] _actualData;
    private IDataSourceSchema _schema;
    private int _pageIndex;
    private ISectionInformation[] _groupInfromation;
    private ISummaryResult[] _summaryInformation;

    public ODataDataSourcePage(IEnumerable<IDictionary<string, object>> sourceData, IDataSourceSchema schema, ISectionInformation[] groupInformation, ISummaryResult[] summaryInformation, int pageIndex)
    {
        if (sourceData == null)
        {
            _actualData = null;
        }
        else
        {
            _actualData = sourceData.ToArray();
        }
        _schema = schema;
        _groupInfromation = groupInformation;
        _summaryInformation = summaryInformation;
        _pageIndex = pageIndex;
    }

    /// <summary>
    /// Gets the actual number of records in the current page.
    /// </summary>
    /// <returns>The number of records in the page.</returns>
    public int Count()
    {
        return _actualData.Length;
    }

    /// <summary>
    /// Gets the item at the specified index within the page.
    /// </summary>
    /// <param name="index">The index, within the page, from which to get the desired item.</param>
    /// <returns>The requested item from the page.</returns>
    public object GetItemAtIndex(int index)
    {
        return _actualData[index];
    }

    /// <summary>
    /// Gets the desired item value, by name, from the item at the provided index, within the page.
    /// </summary>
    /// <param name="index">The index, within the page, for the item from which to get values.</param>
    /// <param name="valueName">The name of the value to read from the desired item.</param>
    /// <returns>The desired value from the requested item.</returns>
    public object GetItemValueAtIndex(int index, string valueName)
    {
        var item = _actualData[index];
        if (!item.ContainsKey(valueName))
        {
            return null;
        }
        return item[valueName];
    }

    /// <summary>
    /// Gets the absolute index of the current page within the data source.
    /// </summary>
    /// <returns></returns>
    public int PageIndex()
    {
        return _pageIndex;
    }

    /// <summary>
    /// Gets the schema associated with the items of the current page.
    /// </summary>
    /// <returns></returns>
    public IDataSourceSchema Schema()
    {
        return _schema;
    }

    /// <summary>
    /// Information about group boundaries, if available. Not required if unchanged or not yet available.
    /// </summary>
    /// <returns>An array of information about the group boundaries, in order, if available, otherwise null.</returns>
    public ISectionInformation[] GetGroupInformation()
    {
        return _groupInfromation;
    }

    public ISummaryResult[] GetSummaryInformation()
    {
        return _summaryInformation;
    }
}