private static List <object> Deserialize(string pagingCookie, int pageNumber)
{
ClientExceptionHelper.ThrowIfNegative(pageNumber, nameof(pageNumber));
List <object> objectList = new List <object>();
try
{
using (XmlReader xmlReader = PagingCookieHelper.CreateXmlReader(pagingCookie))
{
xmlReader.Read();
objectList.Add((object)pageNumber);
string attribute1 = xmlReader.GetAttribute("parentEntityId");
if (!string.IsNullOrEmpty(attribute1))
{
objectList.Add((object)new Guid(attribute1));
string attribute2 = xmlReader.GetAttribute("parentAttributeName");
ClientExceptionHelper.ThrowIfNullOrEmpty(attribute2, "parentAttributeName");
objectList.Add((object)attribute2);
int result = -1;
if (int.TryParse(xmlReader.GetAttribute("parentEntityObjectTypeCode"), out result))
{
objectList.Add((object)result);
}
else
{
ClientExceptionHelper.ThrowIfNegative(result, "parentOtc");
}
}
while (xmlReader.Read())
{
if (xmlReader.NodeType != XmlNodeType.EndElement)
{
string name = xmlReader.Name;
ClientExceptionHelper.ThrowIfNullOrEmpty(name, "field");
objectList.Add((object)name);
if (xmlReader.AttributeCount != 2)
{
throw new NotSupportedException("Malformed XML Passed to in the Paging Cookie. We expect at most two attributes (first/firstNull and last/lastNull)");
}
string attribute2 = xmlReader.GetAttribute("last");
if (attribute2 == null)
{
if (xmlReader.GetAttribute("lastnull") == null)
{
throw new NotSupportedException("Malformed XML Passed to in the Paging Cookie. Value for attribute last was not specified, and it was not null either.");
}
objectList.Add((object)null);
}
else
{
objectList.Add((object)attribute2);
}
string attribute3 = xmlReader.GetAttribute("first");
if (attribute3 == null)
{
if (xmlReader.GetAttribute("firstnull") == null)
{
throw new NotSupportedException("Malformed XML Passed to in the Paging Cookie. Value for attribute first was not specified, and it was not null either.");
}
objectList.Add((object)null);
}
else
{
objectList.Add((object)attribute3);
}
}
}
}
}
catch (XmlException ex)
{
throw new NotSupportedException("Malformed XML in the Paging Cookie", (Exception)ex);
}
catch (FormatException ex)
{
throw new NotSupportedException("Malformed XML in the Paging Cookie", (Exception)ex);
}
return(objectList);
}
public static object[] ToContinuationToken(string pagingCookie, int pageNumber)
{
return(PagingCookieHelper.Deserialize(pagingCookie, pageNumber).ToArray());
}
public static string ToPagingCookie(object[] continuationToken, out int pageNumber)
{
return(PagingCookieHelper.Serialize(continuationToken, out pageNumber));
}
private static string Serialize(object[] pagingElements, out int pageNumber)
{
pageNumber = 0;
if (pagingElements == null || pagingElements.Length == 0)
{
return((string)null);
}
if (pagingElements.Length % 3 != 1)
{
throw new NotSupportedException("Skip token has incorrect length");
}
if (pagingElements[0] == null || !(pagingElements[0].GetType() == typeof(int)) || (int)pagingElements[0] < 0)
{
throw new NotSupportedException("Skip token has incorrect page value");
}
pageNumber = (int)pagingElements[0];
using (StringWriter stringWriter = new StringWriter((IFormatProvider)CultureInfo.InvariantCulture))
{
using (XmlWriter xmlWriter = PagingCookieHelper.CreateXmlWriter((TextWriter)stringWriter))
{
xmlWriter.WriteStartElement("cookie");
xmlWriter.WriteAttributeString("page", pageNumber.ToString((IFormatProvider)CultureInfo.InvariantCulture));
int num = 1;
if (pagingElements[1] != null && pagingElements[1].GetType() == typeof(Guid) && (pagingElements[2] != null && pagingElements[2].GetType() == typeof(string)) && (pagingElements[3] != null && pagingElements[3].GetType() == typeof(int)))
{
num = 4;
xmlWriter.WriteAttributeString("parentEntityId", pagingElements[1].ToString());
xmlWriter.WriteAttributeString("parentAttributeName", (string)pagingElements[2]);
xmlWriter.WriteAttributeString("parentEntityObjectTypeCode", pagingElements[3].ToString());
}
for (int index = num; index < pagingElements.Length; index += 3)
{
string pagingElement = (string)pagingElements[index];
ClientExceptionHelper.ThrowIfNullOrEmpty(pagingElement, "attributeName");
string empty1 = string.Empty;
string empty2 = string.Empty;
string str1 = (string)pagingElements[index + 1];
string str2 = (string)pagingElements[index + 2];
xmlWriter.WriteStartElement(pagingElement);
string localName1;
if (str1 != null)
{
localName1 = "last";
}
else
{
localName1 = "lastnull";
str1 = "1";
}
string localName2;
if (str2 != null)
{
localName2 = "first";
}
else
{
localName2 = "firstnull";
str2 = "1";
}
xmlWriter.WriteAttributeString(localName1, str1);
xmlWriter.WriteAttributeString(localName2, str2);
xmlWriter.WriteEndElement();
}
xmlWriter.WriteEndElement();
}
return(stringWriter.ToString());
}
}
