//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel.Activation.Configuration
{
    using System;
    using System.ComponentModel;
    using System.ComponentModel.Design.Serialization;
    using System.Runtime;
    using System.Security.Principal;

    class SecurityIdentifierConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            if (typeof(string) == sourceType)
            {
                return true;
            }

            return base.CanConvertFrom(context, sourceType);
        }

        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            if (typeof(InstanceDescriptor) == destinationType)
            {
                return true;
            }

            return base.CanConvertTo(context, destinationType);
        }

        public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
        {
            Fx.Assert(this.CanConvertFrom(context, value.GetType()), "");
            if (value is string)
            {
                return new SecurityIdentifier((string)value);
            }

            return base.ConvertFrom(context, culture, value);
        }

        public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
        {
            Fx.Assert(this.CanConvertTo(context, destinationType), "");
            if (destinationType == typeof(string) && value is SecurityIdentifier)
            {
                SecurityIdentifier sid = (SecurityIdentifier)value;
                return sid.Value;
            }

            return base.ConvertTo(context, culture, value, destinationType);
        }
    }
}