mcs/class/System.Web/System.Web/SiteMap.cs

   1 //
   2 // System.Web.SiteMap
   3 //
   4 // Authors:
   5 //      Ben Maurer (bmaurer@users.sourceforge.net)
   6 //
   7 // (C) 2003 Ben Maurer
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if NET_2_0
  32 using System.Collections;
  33 using System.Collections.Specialized;
  34 using System.Text;
  35 using System.Configuration.Provider;
  36 using System.Configuration;
  37 using System.Web.Configuration;
  38
  39 namespace System.Web {
  40         public abstract class SiteMap {
  41
  42                 internal SiteMap ()
  43                 {
  44                 }
  45
  46                 private static void Init ()
  47                 {
  48                         lock (locker) {
  49                                 if (provider == null) {
  50                                         System.Configuration.Configuration conf = WebConfigurationManager.OpenWebConfiguration ("/");
  51                                         SiteMapSection section = (SiteMapSection) conf.GetSection ("system.web/siteMap");
  52                                         providers = new SiteMapProviderCollection ();
  53
  54                                         if (section.Enabled) {
  55                                                 foreach (ProviderSettings prov in section.Providers) {
  56                                                         Type t = Type.GetType (prov.Type);
  57                                                         if (t == null)
  58                                                                 throw new ConfigurationException ("Cannot find type: " + prov.Type);
  59                                                         if (!typeof(SiteMapProvider).IsAssignableFrom (t))
  60                                                                 throw new ConfigurationException ("The provided type is not a SiteMapProvider subclass: " + prov.Type);
  61
  62                                                         SiteMapProvider pr = (SiteMapProvider) Activator.CreateInstance (t);
  63                                                         pr.Initialize (prov.Name, prov.Parameters);
  64
  65                                                         if (provider == null || prov.Name == section.DefaultProvider)
  66                                                                 provider = pr;
  67
  68                                                         providers.Add (pr);
  69                                                 }
  70                                         }
  71
  72                                         if (providers.Count == 0) {
  73                                                 provider = new XmlSiteMapProvider ();
  74                                                 NameValueCollection attributes = new NameValueCollection ();
  75                                                 attributes.Add ("siteMapFile", "Web.sitemap");
  76                                                 provider.Initialize ("AspNetXmlSiteMapProvider", attributes);
  77                                                 providers.Add (provider);
  78                                         }
  79                                 }
  80                         }
  81                 }
  82
  83                 public static SiteMapNode CurrentNode {
  84                         get { return Provider.CurrentNode; }
  85                 }
  86                 public static SiteMapNode RootNode {
  87                         get { return Provider.RootNode; }
  88                 }
  89
  90                 public static SiteMapProvider Provider {
  91                         get {
  92                                 Init ();
  93                                 return provider;
  94                         }
  95                 }
  96                 public static SiteMapProviderCollection Providers {
  97                         get {
  98                                 Init ();
  99                                 return providers;
 100                         }
 101                 }
 102
 103                 public event SiteMapResolveEventHandler SiteMapResolve {
 104                         add { Provider.SiteMapResolve += value; }
 105                         remove { Provider.SiteMapResolve -= value; }
 106                 }
 107
 108                 static SiteMapProvider provider;
 109                 static SiteMapProviderCollection providers;
 110                 static object locker = new object ();
 111         }
 112 }
 113 #endif
 114