mcs/class/System.Data.SqlXml/System.Xml/XmlDataSourceResolver.cs

   1 //
   2 // XmlDataSourceResolver.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto  <atsushi@ximian.com>
   6 //
   7 // (C)2003 Novell inc.
   8 //
   9 #if NET_1_2
  10
  11 using System;
  12 using System.Collections;
  13 using System.Data;
  14 using System.Data.SqlXml;
  15 using System.Net;
  16
  17 namespace System.Xml
  18 {
  19         public class XmlDataSourceResolver : XmlResolver
  20         {
  21                 XmlNameTable nameTable;
  22                 Hashtable table;
  23
  24                 public XmlDataSourceResolver ()
  25                         : this (new NameTable ())
  26                 {
  27                 }
  28
  29                 public XmlDataSourceResolver (XmlNameTable nameTable)
  30                 {
  31                         this.nameTable = nameTable;
  32                         table = new Hashtable ();
  33                 }
  34
  35                 public virtual int Count {
  36                         get { return table.Count; }
  37                 }
  38
  39                 public ICredentials Credentials {
  40                         set { throw new NotImplementedException (); }
  41                 }
  42
  43                 public virtual object this [string query] {
  44                         get { return table [new Uri (query, true, true)]; }
  45                 }
  46
  47                 public virtual void Add (string name, IDbConnection dbConnection)
  48                 {
  49                         table.Add (new Uri (name), dbConnection);
  50                 }
  51
  52                 public virtual void Add (string name, IDbTransaction dbTransaction)
  53                 {
  54                         table.Add (new Uri (name), dbTransaction);
  55                 }
  56
  57                 public virtual void Add (string name, string sourceUri)
  58                 {
  59                         table.Add (new Uri (name), sourceUri);
  60                 }
  61
  62                 public virtual void Add (string name, XmlReader documentReader)
  63                 {
  64                         table.Add (new Uri (name), documentReader);
  65                 }
  66
  67                 public virtual void Add (string name, XPathNavigator2 document)
  68                 {
  69                         table.Add (new Uri (name), document);
  70                 }
  71
  72                 public virtual void Clear ()
  73                 {
  74                         table.Clear ();
  75                 }
  76
  77                 public virtual bool Contains (string name)
  78                 {
  79                         return table.ContainsKey (new Uri (name, true, true));
  80                 }
  81
  82                 public override object GetEntity (Uri absoluteUri,
  83                         string role,
  84                         Type ofObjectToReturn)
  85                 {
  86                         if (absoluteUri == null)
  87                                 throw new ArgumentNullException ("absoluteUri");
  88
  89                         if (ofObjectToReturn == null)
  90                                 throw new ArgumentNullException ("ofObjectToReturn");
  91
  92                         object o = table [absoluteUri];
  93                         if (o == null)
  94                                 return null;
  95
  96                         Type type = o.GetType ();
  97                         if (type == ofObjectToReturn)
  98                                 return o;
  99                         else if (type.IsSubClassOf (ofObjectToReturn))
 100                                 return o;
 101
 102                         switch (ofObjectToReturn.FullName) {
 103                         case "System.Data.IDbConnection":
 104                                 throw new NotImplementedException ();
 105                         case "System.Xml.XPathNavigator2":
 106                                 return GetXPathNavigator (o);
 107                         case "System.Array": // array of IXPathNavigable
 108                                 throw new NotImplementedException ();
 109                         default:
 110                                 throw new NotSupportedException ();
 111                         }
 112                 }
 113
 114                 private XPathNavigator2 GetXPathNavigator (object o)
 115                 {
 116                         if (o is string)
 117                                 return new XPathDocument2 (new XmlTextReader (o as string)).CreateNavigator ();
 118                         else if (o is XmlReader)
 119                                 return new XPathDocument2 (o as XmlReader).CreateNavigator ();
 120                         else
 121                                 throw new NotImplementedException ();
 122                 }
 123
 124                 public IDictionaryEnumerator GetEnumerator ()
 125                 {
 126                         return table.GetEnumerator ();
 127                 }
 128
 129                 public void Remove (string name)
 130                 {
 131                         table.Remove (new Uri (name, true, true));
 132                 }
 133
 134                 public override Uri ResolveUri (Uri baseUri, string relativeUri)
 135                 {
 136                         // XmlDataSourceResolver has no concept of base URIs.
 137
 138                         // Note that this constructor uses new .NET 1.2 feature.
 139                         return new Uri (relativeUri, true, true)
 140                 }
 141         }
 142 }
 143
 144 #endif