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ValidationProblemDetails21Wrapper.cs
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ValidationProblemDetails21Wrapper.cs
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Xml;
using System.Xml.Serialization;
namespace Microsoft.AspNetCore.Mvc.Formatters.Xml
{
/// <summary>
/// Wrapper class for <see cref="ValidationProblemDetails"/> to enable it to be serialized by the xml formatters.
/// </summary>
[XmlRoot(nameof(ValidationProblemDetails))]
[Obsolete("This type is deprecated and will be removed in a future version")]
public class ValidationProblemDetails21Wrapper : ProblemDetails21Wrapper, IUnwrappable
{
private static readonly string ErrorKey = "MVC-Errors";
/// <summary>
/// Initializes a new instance of <see cref="ValidationProblemDetailsWrapper"/>.
/// </summary>
public ValidationProblemDetails21Wrapper()
: this(new ValidationProblemDetails())
{
}
/// <summary>
/// Initializes a new instance of <see cref="ValidationProblemDetailsWrapper"/> for the specified
/// <paramref name="problemDetails"/>.
/// </summary>
/// <param name="problemDetails">The <see cref="ProblemDetails"/>.</param>
public ValidationProblemDetails21Wrapper(ValidationProblemDetails problemDetails)
: base(problemDetails)
{
ProblemDetails = problemDetails;
}
internal new ValidationProblemDetails ProblemDetails { get; }
/// <inheritdoc />
protected override void ReadValue(XmlReader reader, string name)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (string.Equals(name, ErrorKey, StringComparison.Ordinal))
{
reader.Read();
ReadErrorProperty(reader);
}
else
{
base.ReadValue(reader, name);
}
}
private void ReadErrorProperty(XmlReader reader)
{
if (reader.IsEmptyElement)
{
return;
}
while (reader.NodeType != XmlNodeType.EndElement)
{
var key = XmlConvert.DecodeName(reader.LocalName);
var value = reader.ReadInnerXml();
if (string.Equals(EmptyKey, key, StringComparison.Ordinal))
{
key = string.Empty;
}
ProblemDetails.Errors.Add(key, new[] { value });
reader.MoveToContent();
}
}
/// <inheritdoc />
public override void WriteXml(XmlWriter writer)
{
if (writer == null)
{
throw new ArgumentNullException(nameof(writer));
}
base.WriteXml(writer);
if (ProblemDetails.Errors.Count == 0)
{
return;
}
writer.WriteStartElement(XmlConvert.EncodeLocalName(ErrorKey));
foreach (var keyValuePair in ProblemDetails.Errors)
{
var key = keyValuePair.Key;
var value = keyValuePair.Value;
if (string.IsNullOrEmpty(key))
{
key = EmptyKey;
}
writer.WriteStartElement(XmlConvert.EncodeLocalName(key));
if (value != null)
{
writer.WriteValue(value);
}
writer.WriteEndElement();
}
writer.WriteEndElement();
}
object IUnwrappable.Unwrap(Type declaredType)
{
if (declaredType == null)
{
throw new ArgumentNullException(nameof(declaredType));
}
return ProblemDetails;
}
}
}