source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Converters/GenericValueConverter.cs @ 12503

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
  }
}