#region  --------------- Copyright Dresser Wayne Pignone -------------
/*
 * $Log: /Wrk/Support/ForecourtControl/Wrk/ForecourtControl/Com/IAllowedFuelGrades.cs $
 * 
 * 1     07-01-05 9:00 roger.månsson
 * Created
 */
#endregion

using System.Runtime.InteropServices;
namespace Wayne.ForecourtControl
{
    /// <summary>
    /// A collection representing the allowed fuel grades that should be used within the authrorize parameters.
    /// </summary>
    [ComVisible(true)]
    public interface IAllowedFuelGrades
    {
        /// <summary>
        /// Indicates the number of fuel grades.
        /// </summary>
        int Count { get; }
        
        /// <summary>
        /// Indexer returning if the fuel grade is allowed.
        /// </summary>
        /// <param name="index">Fuel grade</param>
        /// <returns>True if the fuel grade is allowed, False if it is disallowed.</returns>
        /// <exception cref="FuelGradeOutOfRangeException">Thrown if the fuel grade is out of range.</exception>
        bool this[int index] { get; set; }
    }
}