XmlResolver.cs

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using System.IO;
using System.Net;
using System.Threading.Tasks;
 
namespace System.Xml;
 
public abstract class XmlResolver
{
    public virtual ICredentials Credentials
    {
        set
        {
        }
    }
 
    public abstract object? GetEntity(Uri absoluteUri, string? role, Type? ofObjectToReturn);
 
    public virtual Uri ResolveUri(Uri? baseUri, string? relativeUri)
    {
        if (baseUri == null || (!baseUri.IsAbsoluteUri && baseUri.OriginalString.Length == 0))
        {
            Uri uri = new Uri(relativeUri, UriKind.RelativeOrAbsolute);
            if (!uri.IsAbsoluteUri && uri.OriginalString.Length > 0)
            {
                uri = new Uri(Path.GetFullPath(relativeUri));
            }
            return uri;
        }
        if (relativeUri == null || relativeUri.Length == 0)
        {
            return baseUri;
        }
        if (!baseUri.IsAbsoluteUri)
        {
            throw new NotSupportedException(System.SR.Xml_RelativeUriNotSupported);
        }
        return new Uri(baseUri, relativeUri);
    }
 
    public virtual bool SupportsType(Uri absoluteUri, Type? type)
    {
        if (absoluteUri == null)
        {
            throw new ArgumentNullException("absoluteUri");
        }
        if (type == null || type == typeof(Stream))
        {
            return true;
        }
        return false;
    }
 
    public virtual Task<object> GetEntityAsync(Uri absoluteUri, string? role, Type? ofObjectToReturn)
    {
        throw new NotImplementedException();
    }
}