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//-----------------------------------------------------------------------
// <copyright file="UriOrOobEncoding.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OAuth.ChannelElements {
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Text;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.Messaging.Reflection;
/// <summary>
/// An URI encoder that translates null <see cref="Uri"/> references as "oob"
/// instead of an empty/missing argument.
/// </summary>
internal class UriOrOobEncoding : IMessagePartNullEncoder {
/// <summary>
/// The string constant "oob", used to indicate an out-of-band configuration.
/// </summary>
private const string OutOfBandConfiguration = "oob";
/// <summary>
/// Initializes a new instance of the <see cref="UriOrOobEncoding"/> class.
/// </summary>
public UriOrOobEncoding() {
}
#region IMessagePartNullEncoder Members
/// <summary>
/// Gets the string representation to include in a serialized message
/// when the message part has a <c>null</c> value.
/// </summary>
/// <value></value>
public string EncodedNullValue {
get { return OutOfBandConfiguration; }
}
#endregion
#region IMessagePartEncoder Members
/// <summary>
/// Encodes the specified value.
/// </summary>
/// <param name="value">The value. Guaranteed to never be null.</param>
/// <returns>
/// The <paramref name="value"/> in string form, ready for message transport.
/// </returns>
public string Encode(object value) {
Uri uriValue = (Uri)value;
return uriValue.AbsoluteUri;
}
/// <summary>
/// Decodes the specified value.
/// </summary>
/// <param name="value">The string value carried by the transport. Guaranteed to never be null, although it may be empty.</param>
/// <returns>
/// The deserialized form of the given string.
/// </returns>
/// <exception cref="FormatException">Thrown when the string value given cannot be decoded into the required object type.</exception>
public object Decode(string value) {
if (string.Equals(value, OutOfBandConfiguration, StringComparison.Ordinal)) {
return null;
} else {
return new Uri(value, UriKind.Absolute);
}
}
#endregion
}
}
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