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.Compiler;
  36 using System.Collections;
  37 using System.Collections.Specialized;
  38 using System.IO;
  39 using System.Reflection;
  40 using System.Web.Configuration;
  41 using System.Web.Hosting;
  42 using System.Web.Util;
  43
  44 namespace System.Web.Compilation {
  45
  46         public abstract class BuildProvider {
  47                 string virtual_path;
  48                 ArrayList ref_assemblies;
  49
  50                 ICollection vpath_deps;
  51
  52                 protected BuildProvider()
  53                 {
  54                         ref_assemblies = new ArrayList ();
  55                 }
  56
  57                 internal void SetVirtualPath (string path)
  58                 {
  59                         virtual_path = path;
  60                 }
  61
  62                 public virtual void GenerateCode (AssemblyBuilder assemblyBuilder)
  63                 {
  64                 }
  65
  66                 public virtual string GetCustomString (CompilerResults results)
  67                 {
  68                         return null;
  69                 }
  70
  71                 protected CompilerType GetDefaultCompilerType ()
  72                 {
  73                         CompilationSection config;
  74                         config = (CompilationSection) WebConfigurationManager.GetSection ("system.web/compilation");
  75                         return GetDefaultCompilerTypeForLanguage (config.DefaultLanguage, config);
  76                 }
  77
  78                 void SetCommonParameters (CompilationSection config, CompilerParameters p)
  79                 {
  80                         p.IncludeDebugInformation = config.Debug;
  81                         foreach (AssemblyInfo info in config.Assemblies) {
  82                                 if (info.Assembly != "*") {
  83                                         p.ReferencedAssemblies.Add (info.Assembly);
  84                                         ref_assemblies.Add (info.Assembly);
  85                                 } else {
  86                                         AddAssembliesInBin (p.ReferencedAssemblies);
  87                                 }
  88                         }
  89
  90                         // explicit, strict?
  91                         // embedded? linked?/resources
  92                 }
  93
  94                 void AddAssembliesInBin (StringCollection coll)
  95                 {
  96                         foreach (string s in HttpApplication.BinDirectoryAssemblies) {
  97                                 coll.Add (s);
  98                                 ref_assemblies.Add (s);
  99                         }
 100                 }
 101
 102                 internal CompilerType GetDefaultCompilerTypeForLanguage (string language, CompilationSection configSection)
 103                 {
 104                         // MS throws when accesing a Hashtable, we do here.
 105                         if (language == null || language == "")
 106                                 throw new ArgumentNullException ("language");
 107
 108                         CompilationSection config;
 109                         if (configSection == null)
 110                                 config = WebConfigurationManager.GetSection ("system.web/compilation") as CompilationSection;
 111                         else
 112                                 config = configSection;
 113
 114                         Compiler compiler = config.Compilers.Get (language);
 115                         CompilerParameters p;
 116                         if (compiler != null) {
 117                                 Type type = HttpApplication.LoadType (compiler.Type, true);
 118                                 p = new CompilerParameters ();
 119                                 p.CompilerOptions = compiler.CompilerOptions;
 120                                 p.WarningLevel = compiler.WarningLevel;
 121                                 SetCommonParameters (config, p);
 122                                 return new CompilerType (type, p);
 123                         }
 124
 125                         if (!CodeDomProvider.IsDefinedLanguage (language))
 126                                 throw new HttpException (String.Format ("No compiler for language '{0}'.", language));
 127
 128                         CompilerInfo info = CodeDomProvider.GetCompilerInfo (language);
 129                         CompilerParameters par = info.CreateDefaultCompilerParameters ();
 130                         SetCommonParameters (config, par);
 131                         return new CompilerType (info.CodeDomProviderType, par);
 132                 }
 133
 134                 protected CompilerType GetDefaultCompilerTypeForLanguage (string language)
 135                 {
 136                         return GetDefaultCompilerTypeForLanguage (language, null);
 137                 }
 138
 139                 public virtual Type GetGeneratedType (CompilerResults results)
 140                 {
 141                         return null;
 142                 }
 143
 144                 public virtual BuildProviderResultFlags GetResultFlags (CompilerResults results)
 145                 {
 146                         return BuildProviderResultFlags.Default;
 147                 }
 148
 149                 protected TextReader OpenReader ()
 150                 {
 151                         return OpenReader (VirtualPath);
 152                 }
 153
 154                 protected TextReader OpenReader (string virtualPath)
 155                 {
 156                         Stream st = OpenStream (virtualPath);
 157                         return new StreamReader (st, WebEncoding.FileEncoding);
 158                 }
 159
 160                 protected Stream OpenStream ()
 161                 {
 162                         return OpenStream (VirtualPath);
 163                 }
 164
 165                 protected Stream OpenStream (string virtualPath)
 166                 {
 167                         // MS also throws a NullReferenceException here when not hosted.
 168                         return VirtualPathProvider.OpenFile (virtualPath);
 169                 }
 170
 171                 public virtual CompilerType CodeCompilerType {
 172                         get { return null; } // Documented to return null
 173                 }
 174
 175                 protected ICollection ReferencedAssemblies {
 176                         get { return ref_assemblies; }
 177                 }
 178
 179                 protected internal string VirtualPath {
 180                         get { return virtual_path; }
 181                 }
 182
 183                 public virtual ICollection VirtualPathDependencies {
 184                         get {
 185                                 if (vpath_deps == null)
 186                                         vpath_deps = new OneNullCollection ();
 187
 188                                 return vpath_deps;
 189                         }
 190                 }
 191         }
 192
 193         class OneNullCollection : ICollection {
 194                 public int Count {
 195                         get { return 1; }
 196                 }
 197
 198                 public bool IsSynchronized {
 199                         get { return false; }
 200                 }
 201
 202                 public object SyncRoot {
 203                         get { return this; }
 204                 }
 205
 206                 public void CopyTo (Array array, int index)
 207                 {
 208                         if (array == null)
 209                                 throw new ArgumentNullException ();
 210
 211                         if (index < 0)
 212                                 throw new ArgumentOutOfRangeException ();
 213
 214                         if (array.Rank > 1)
 215                                 throw new ArgumentException ();
 216
 217                         int length = array.Length;
 218                         if (index >= length || index > length - 1)
 219                                 throw new ArgumentException ();
 220
 221                         array.SetValue (null, index);
 222                 }
 223
 224                 public IEnumerator GetEnumerator ()
 225                 {
 226                         yield return null;
 227                 }
 228         }
 229 }
 230 #endif
 231