Attribute-flavored Domain Driven Design

using System;
using System.ComponentModel;
using System.Globalization;
using Codebasement.DomainDrivenDesign.Basement.Utilities;

namespace Codebasement.DomainDrivenDesign.Model.Converters
{
    /// <summary>
    /// The passwordstring converter can be used to mask the display of a password setting.
    /// </summary>
    public class PasswordStringConverter : StringConverter
    {
        /// <summary>
        /// This method is implemented to tell that the converter cannot convert from the given format.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="sourceType"></param>
        /// <returns>false</returns>
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return false;
        }


        /// <summary>
        /// This method returns a masked string that will be displayed in the design pane.
        /// </summary>
        /// <param name="context"></param>
        /// <param name="culture"></param>
        /// <param name="value"></param>
        /// <param name="destinationType"></param>
        /// <returns>A string containing password-dots.</returns>
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value,
                                         Type destinationType)
        {
            return String.Empty.PadLeft(((string) value).Length, RegexExpressions.PasswordChar);
        }
    }
}