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//------------------------------------------------------------------------------
// <copyright file="SchemaReference.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Services.Discovery {
using System;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using System.IO;
using System.Web.Services.Protocols;
using System.ComponentModel;
using System.Text;
using System.Threading;
using System.Collections;
using System.Globalization;
using System.Diagnostics;
using System.Web.Services.Diagnostics;
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[XmlRoot("schemaRef", Namespace = SchemaReference.Namespace)]
public sealed class SchemaReference : DiscoveryReference {
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.Namespace"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public const string Namespace = "http://schemas.xmlsoap.org/disco/schema/";
private string reference;
private string targetNamespace;
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.SchemaReference"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public SchemaReference() {
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.SchemaReference1"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public SchemaReference(string url) {
Ref = url;
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.Ref"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[XmlAttribute("ref")]
public string Ref {
get {
return reference == null ? "" : reference;
}
set {
reference = value;
}
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.TargetNamespace"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[XmlAttribute("targetNamespace"), DefaultValue(null)]
public string TargetNamespace {
get { return targetNamespace; }
set { targetNamespace = value; }
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.Url"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[XmlIgnore]
public override string Url {
get { return Ref; }
set { Ref = value; }
}
internal XmlSchema GetSchema() {
try {
return Schema;
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
throw;
}
// don't let the exception out - keep going. Just add it to the list of errors.
ClientProtocol.Errors[Url] = e;
if (Tracing.On) Tracing.ExceptionCatch(TraceEventType.Warning, this, "GetSchema", e);
}
return null;
}
internal override void LoadExternals(Hashtable loadedExternals) {
LoadExternals(GetSchema(), Url, ClientProtocol, loadedExternals);
}
internal static void LoadExternals(XmlSchema schema, string url, DiscoveryClientProtocol client, Hashtable loadedExternals) {
if (schema == null)
return;
foreach (XmlSchemaExternal external in schema.Includes) {
if (external.SchemaLocation == null || external.SchemaLocation.Length == 0 || external.Schema != null)
continue;
if (external is XmlSchemaInclude || external is XmlSchemaRedefine) {
string location = UriToString(url, external.SchemaLocation);
if (client.References[location] is SchemaReference) {
SchemaReference externalRef = (SchemaReference)client.References[location];
external.Schema = externalRef.GetSchema();
if (external.Schema != null)
loadedExternals[location] = external.Schema;
externalRef.LoadExternals(loadedExternals);
}
}
}
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.WriteDocument"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public override void WriteDocument(object document, Stream stream) {
((XmlSchema)document).Write(new StreamWriter(stream, new UTF8Encoding(false)));
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.ReadDocument"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public override object ReadDocument(Stream stream) {
XmlTextReader reader = new XmlTextReader(this.Url, stream);
reader.XmlResolver = null;
return XmlSchema.Read(reader, null);
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.DefaultFilename"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[XmlIgnore]
public override string DefaultFilename {
get {
string fileName = MakeValidFilename(Schema.Id);
if (fileName == null || fileName.Length == 0) {
fileName = FilenameFromUrl(Url);
}
return Path.ChangeExtension(fileName, ".xsd");
}
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.Schema"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
[XmlIgnore]
public XmlSchema Schema {
get {
if (ClientProtocol == null)
throw new InvalidOperationException(Res.GetString(Res.WebMissingClientProtocol));
object document = ClientProtocol.InlinedSchemas[Url];
if (document == null) {
document = ClientProtocol.Documents[Url];
}
if (document == null) {
Resolve();
document = ClientProtocol.Documents[Url];
}
XmlSchema schema = document as XmlSchema;
if (schema == null) {
throw new InvalidOperationException(Res.GetString(Res.WebInvalidDocType,
typeof(XmlSchema).FullName,
document == null ? string.Empty : document.GetType().FullName,
Url));
}
return schema;
}
}
/// <include file='doc\SchemaReference.uex' path='docs/doc[@for="SchemaReference.Resolve"]/*' />
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected internal override void Resolve(string contentType, Stream stream) {
if (ContentType.IsHtml(contentType))
ClientProtocol.Errors[Url] = new InvalidContentTypeException(Res.GetString(Res.WebInvalidContentType, contentType), contentType);
XmlSchema schema = ClientProtocol.Documents[Url] as XmlSchema;
if ( schema == null ) {
if (ClientProtocol.Errors[Url] != null)
throw (Exception)ClientProtocol.Errors[Url];
schema = (XmlSchema)ReadDocument(stream);
ClientProtocol.Documents[Url] = schema;
}
if (ClientProtocol.References[Url] != this)
ClientProtocol.References[Url] = this;
// now resolve references in the schema.
foreach (XmlSchemaExternal external in schema.Includes) {
string location = null;
try {
if (external.SchemaLocation != null && external.SchemaLocation.Length > 0) {
location = UriToString(Url, external.SchemaLocation);
SchemaReference externalRef = new SchemaReference(location);
externalRef.ClientProtocol = ClientProtocol;
ClientProtocol.References[location] = externalRef;
externalRef.Resolve();
}
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
throw;
}
throw new InvalidDocumentContentsException(Res.GetString(Res.TheSchemaDocumentContainsLinksThatCouldNotBeResolved, location), e);
}
}
return;
}
}
}
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