using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Data;

using System.Globalization;



namespace Microsoft.Research.DynamicDataDisplay.Converters

{

	/// <summary>

	/// Represents a typed value converter. It simplifies life of its sub-class as there no need to

	/// check what types arguments have.

	/// </summary>

	/// <typeparam name="T"></typeparam>

	public class GenericValueConverter<T> : IValueConverter

	{

		/// <summary>

		/// Initializes a new instance of the <see cref="GenericValueConverter&lt;T&gt;"/> class.

		/// </summary>

		public GenericValueConverter() { }



		private Func<T, object> conversion;

		public GenericValueConverter(Func<T, object> conversion)

		{

			if (conversion == null)

				throw new ArgumentNullException("conversion");



			this.conversion = conversion;

		}



		#region IValueConverter Members



		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

		{

			if (value is T)

			{

				T genericValue = (T)value;



				object result = ConvertCore(genericValue, targetType, parameter, culture);

				return result;

			}

			return null;

		}



		public virtual object ConvertCore(T value, Type targetType, object parameter, CultureInfo culture)

		{

			if (conversion != null)

			{

				return conversion(value);

			}



			throw new NotImplementedException();

		}



		public virtual object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

		{

			throw new NotSupportedException();

		}



		#endregion

	}

}