SchemaReference.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » Services » Discovery » C# / CSharp Open Source

// 
// System.Web.Services.Discovery.SchemaReference.cs
//
// Author:
//   Dave Bettin (javabettin@yahoo.com)
//   Lluis Sanchez Gual (lluis@ximian.com)
//
// Copyright (C) Dave Bettin, 2002
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//


using System.ComponentModel;
using System.IO;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;

namespace System.Web.Services.Discovery{

  [XmlRootAttribute("schemaRef", Namespace="http://schemas.xmlsoap.org/disco/schema/", IsNullable=true)]
  public sealed class SchemaReference : DiscoveryReference {

    #region Fields
    
    public const string Namespace = "http://schemas.xmlsoap.org/disco/schema/";

    private string defaultFilename;
    private string href;
    private string targetNamespace;
    private XmlSchema schema;
    
    #endregion // Fields
    
    #region Constructors

    public SchemaReference () 
    {
    }
    
    public SchemaReference (string href) : this() 
    {
      this.href = href;
    }    
    
    #endregion // Constructors

    #region Properties

    [XmlIgnore]
    public override string DefaultFilename {
      get { return FilenameFromUrl (Url) + ".xsd"; }
    }
    
    [XmlAttribute("ref")]
    public string Ref {
      get { return href; }
      set { href = value; }
    }
    
    [XmlIgnore]
    public override string Url {
      get { return href; }
      set { href = value; }
    }
    
    [DefaultValue(null)]
    [XmlAttribute("targetNamespace")]
    public string TargetNamespace {
      get { return targetNamespace; }
      set { targetNamespace = value; }
    }

    [XmlIgnore]
    public XmlSchema Schema {
      get { 
        if (ClientProtocol == null) 
          throw new InvalidOperationException ("The ClientProtocol property is a null reference");
        
        XmlSchema doc = ClientProtocol.Documents [Url] as XmlSchema;
        if (doc == null)
          throw new Exception ("The Documents property of ClientProtocol does not contain a schema with the url " + Url);
          
        return doc; 
      }
      
    }
    
    #endregion // Properties

    #region Methods

    public override object ReadDocument (Stream stream)
    {
      return XmlSchema.Read (stream, null);
    }
                
    protected internal override void Resolve (string contentType, Stream stream) 
    {
      XmlSchema doc = XmlSchema.Read (stream, null);
      ClientProtocol.Documents.Add (Url, doc);
      if (!ClientProtocol.References.Contains (Url))
        ClientProtocol.References.Add (this);
    }
                
    internal void ResolveInternal (DiscoveryClientProtocol prot, XmlSchema xsd) 
    {
      if (xsd.Includes.Count == 0) return;
      
      foreach (XmlSchemaExternal ext in xsd.Includes)
      {
        if (ext.SchemaLocation == null)
          continue;

        // Make relative uris to absoulte

        Uri uri = new Uri (BaseUri, ext.SchemaLocation);
        string url = uri.ToString ();

        if (prot.Documents.Contains (url))   // Already resolved
          continue;

        try
        {
          string contentType = null;
          Stream stream = prot.Download (ref url, ref contentType);
          XmlTextReader reader = new XmlTextReader (url, stream);
          reader.XmlResolver = null;
          reader.MoveToContent ();
          
          DiscoveryReference refe;
          XmlSchema schema = XmlSchema.Read (reader, null);
          refe = new SchemaReference ();
          refe.ClientProtocol = prot;
          refe.Url = url;
          prot.Documents.Add (url, schema);
          ((SchemaReference)refe).ResolveInternal (prot, schema);
          
          if (!prot.References.Contains (url))
            prot.References.Add (refe);
            
          stream.Close ();
        }
        catch (Exception ex)
        {
          ReportError (url, ex);
        }
      }
    }

    public override void WriteDocument (object document, Stream stream) 
    {
      ((XmlSchema)document).Write (stream);
    }

    #endregion // Methods
  }
}