mcs/class/System.Web/System.Web.Compilation/BuildProvider.cs

   1 //
   2 // System.Web.Compilation.BuildProvider
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (C) 2006 Novell, Inc (http://www.novell.com)
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 #if NET_2_0
  33
  34 using System;
  35 using System.CodeDom;
  36 using System.CodeDom.Compiler;
  37 using System.Collections;
  38 using System.Collections.Specialized;
  39 using System.IO;
  40 using System.Reflection;
  41 using System.Web.Configuration;
  42 using System.Web.Hosting;
  43 using System.Web.Util;
  44
  45 namespace System.Web.Compilation {
  46
  47         public abstract class BuildProvider {
  48                 string virtual_path;
  49                 ArrayList ref_assemblies;
  50
  51                 ICollection vpath_deps;
  52
  53                 protected BuildProvider()
  54                 {
  55                         ref_assemblies = new ArrayList ();
  56                 }
  57
  58                 internal void SetVirtualPath (VirtualPath virtualPath)
  59                 {
  60                         virtual_path = virtualPath.Absolute;
  61                 }
  62
  63                 internal virtual void GenerateCode ()
  64                 {
  65                 }
  66
  67                 public virtual void GenerateCode (AssemblyBuilder assemblyBuilder)
  68                 {
  69                 }
  70
  71                 public virtual string GetCustomString (CompilerResults results)
  72                 {
  73                         return null;
  74                 }
  75
  76                 protected CompilerType GetDefaultCompilerType ()
  77                 {
  78                         CompilationSection config;
  79                         config = (CompilationSection) WebConfigurationManager.GetSection ("system.web/compilation");
  80                         return BuildManager.GetDefaultCompilerTypeForLanguage (config.DefaultLanguage, config);
  81                 }
  82
  83                 protected CompilerType GetDefaultCompilerTypeForLanguage (string language)
  84                 {
  85                         return BuildManager.GetDefaultCompilerTypeForLanguage (language, null);
  86                 }
  87
  88                 public virtual Type GetGeneratedType (CompilerResults results)
  89                 {
  90                         return null;
  91                 }
  92
  93                 public virtual BuildProviderResultFlags GetResultFlags (CompilerResults results)
  94                 {
  95                         return BuildProviderResultFlags.Default;
  96                 }
  97
  98                 protected TextReader OpenReader ()
  99                 {
 100                         return OpenReader (VirtualPath);
 101                 }
 102
 103                 protected TextReader OpenReader (string virtualPath)
 104                 {
 105                         Stream st = OpenStream (virtualPath);
 106                         return new StreamReader (st, WebEncoding.FileEncoding);
 107                 }
 108
 109                 protected Stream OpenStream ()
 110                 {
 111                         return OpenStream (VirtualPath);
 112                 }
 113
 114                 protected Stream OpenStream (string virtualPath)
 115                 {
 116                         // MS also throws a NullReferenceException here when not hosted.
 117                         return VirtualPathProvider.OpenFile (virtualPath);
 118                 }
 119
 120                 public virtual CompilerType CodeCompilerType {
 121                         get { return null; } // Documented to return null
 122                 }
 123
 124                 protected ICollection ReferencedAssemblies {
 125                         get { return ref_assemblies; }
 126                 }
 127
 128                 protected internal string VirtualPath {
 129                         get { return virtual_path; }
 130                 }
 131
 132                 public virtual ICollection VirtualPathDependencies {
 133                         get {
 134                                 if (vpath_deps == null)
 135                                         vpath_deps = new OneNullCollection ();
 136
 137                                 return vpath_deps;
 138                         }
 139                 }
 140
 141                 internal virtual CodeCompileUnit CodeUnit {
 142                         get { return null; }
 143                 }
 144         }
 145
 146         class OneNullCollection : ICollection {
 147                 public int Count {
 148                         get { return 1; }
 149                 }
 150
 151                 public bool IsSynchronized {
 152                         get { return false; }
 153                 }
 154
 155                 public object SyncRoot {
 156                         get { return this; }
 157                 }
 158
 159                 public void CopyTo (Array array, int index)
 160                 {
 161                         if (array == null)
 162                                 throw new ArgumentNullException ();
 163
 164                         if (index < 0)
 165                                 throw new ArgumentOutOfRangeException ();
 166
 167                         if (array.Rank > 1)
 168                                 throw new ArgumentException ();
 169
 170                         int length = array.Length;
 171                         if (index >= length || index > length - 1)
 172                                 throw new ArgumentException ();
 173
 174                         array.SetValue (null, index);
 175                 }
 176
 177                 public IEnumerator GetEnumerator ()
 178                 {
 179                         yield return null;
 180                 }
 181         }
 182 }
 183 #endif
 184