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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Security
{
using System.Collections.Generic;
using System.IdentityModel;
using System.Runtime.CompilerServices;
using System.Xml;
using DictionaryManager = System.IdentityModel.DictionaryManager;
using ISecurityElement = System.IdentityModel.ISecurityElement;
[TypeForwardedFrom("System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
sealed class ReferenceList : ISecurityElement
{
internal static readonly XmlDictionaryString ElementName = XD.XmlEncryptionDictionary.ReferenceList;
const string NamespacePrefix = XmlEncryptionStrings.Prefix;
internal static readonly XmlDictionaryString NamespaceUri = EncryptedType.NamespaceUri;
internal static readonly XmlDictionaryString UriAttribute = XD.XmlEncryptionDictionary.URI;
List<string> referredIds = new List<string>();
public ReferenceList()
{
}
public int DataReferenceCount
{
get { return this.referredIds.Count; }
}
public bool HasId
{
get { return false; }
}
public string Id
{
get
{
// PreSharp Bug: Property get methods should not throw exceptions.
#pragma warning suppress 56503
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException());
}
}
public void AddReferredId(string id)
{
if (id == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("id"));
}
this.referredIds.Add(id);
}
public bool ContainsReferredId(string id)
{
if (id == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("id"));
}
return this.referredIds.Contains(id);
}
public string GetReferredId(int index)
{
return this.referredIds[index];
}
public void ReadFrom(XmlDictionaryReader reader)
{
reader.ReadStartElement(ElementName, NamespaceUri);
while (reader.IsStartElement())
{
string id = DataReference.ReadFrom(reader);
if (this.referredIds.Contains(id))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityMessageSerializationException(SR.GetString(SR.InvalidDataReferenceInReferenceList, "#" + id)));
}
this.referredIds.Add(id);
}
reader.ReadEndElement(); // ReferenceList
if (this.DataReferenceCount == 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityMessageSerializationException(SR.GetString(SR.ReferenceListCannotBeEmpty)));
}
}
public bool TryRemoveReferredId(string id)
{
if (id == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("id"));
}
return this.referredIds.Remove(id);
}
public void WriteTo(XmlDictionaryWriter writer, DictionaryManager dictionaryManager)
{
if (this.DataReferenceCount == 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ReferenceListCannotBeEmpty)));
}
writer.WriteStartElement(NamespacePrefix, ElementName, NamespaceUri);
for (int i = 0; i < this.DataReferenceCount; i++)
{
DataReference.WriteTo(writer, this.referredIds[i]);
}
writer.WriteEndElement(); // ReferenceList
}
static class DataReference
{
internal static readonly XmlDictionaryString ElementName = XD.XmlEncryptionDictionary.DataReference;
internal static readonly XmlDictionaryString NamespaceUri = EncryptedType.NamespaceUri;
public static string ReadFrom(XmlDictionaryReader reader)
{
string prefix;
string uri = XmlHelper.ReadEmptyElementAndRequiredAttribute(reader, ElementName, NamespaceUri, ReferenceList.UriAttribute, out prefix);
if (uri.Length < 2 || uri[0] != '#')
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new SecurityMessageSerializationException(SR.GetString(SR.InvalidDataReferenceInReferenceList, uri)));
}
return uri.Substring(1);
}
public static void WriteTo(XmlDictionaryWriter writer, string referredId)
{
writer.WriteStartElement(XD.XmlEncryptionDictionary.Prefix.Value, ElementName, NamespaceUri);
writer.WriteStartAttribute(ReferenceList.UriAttribute, null);
writer.WriteString("#");
writer.WriteString(referredId);
writer.WriteEndAttribute();
writer.WriteEndElement();
}
}
}
}
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