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//------------------------------------------------------------------------------
// <copyright file="XmlResolver.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Xml
{
using System;
using System.IO;
using System.Text;
using System.Security;
using System.Security.Permissions;
#if !SILVERLIGHT
using System.Net;
using System.Threading.Tasks;
#endif
using System.Runtime.Versioning;
/// <include file='doc\XmlResolver.uex' path='docs/doc[@for="XmlResolver"]/*' />
/// <devdoc>
/// <para>Resolves external XML resources named by a Uniform
/// Resource Identifier (URI). This class is <see langword='abstract'/>
/// .</para>
/// </devdoc>
public abstract partial class XmlResolver {
/// <include file='doc\XmlResolver.uex' path='docs/doc[@for="XmlResolver.GetEntity1"]/*' />
/// <devdoc>
/// <para>Maps a
/// URI to an Object containing the actual resource.</para>
/// </devdoc>
public abstract Object GetEntity(Uri absoluteUri,
string role,
Type ofObjectToReturn);
/// <include file='doc\XmlResolver.uex' path='docs/doc[@for="XmlResolver.ResolveUri"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
#if !SILVERLIGHT
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
#endif
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 !SILVERLIGHT // Path.GetFullPath is SecurityCritical
if ( !uri.IsAbsoluteUri && uri.OriginalString.Length > 0 ) {
uri = new Uri( Path.GetFullPath( relativeUri ) );
}
#endif
return uri;
}
else {
if (relativeUri == null || relativeUri.Length == 0) {
return baseUri;
}
// relative base Uri
if ( !baseUri.IsAbsoluteUri ) {
#if SILVERLIGHT
// create temporary base for the relative URIs
Uri tmpBaseUri = new Uri("tmp:///");
// create absolute base URI with the temporary base
Uri absBaseUri = new Uri(tmpBaseUri, baseUri.OriginalString);
// resolve the relative Uri into a new absolute URI
Uri resolvedAbsUri = new Uri(absBaseUri, relativeUri);
// make it relative by removing temporary base
Uri resolvedRelUri = tmpBaseUri.MakeRelativeUri(resolvedAbsUri);
return resolvedRelUri;
#else
throw new NotSupportedException(Res.GetString(Res.Xml_RelativeUriNotSupported));
#endif
}
return new Uri( baseUri, relativeUri );
}
}
#if !SILVERLIGHT
//UE attension
/// <include file='doc\XmlResolver.uex' path='docs/doc[@for="XmlResolver.Credentials"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public virtual ICredentials Credentials {
set { }
}
#endif
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;
}
}
}
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