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                 static object locker = new object ();
  48                 static string private_bin_path;
  49
  50                 string virtual_path;
  51                 ArrayList ref_assemblies;
  52
  53                 ICollection vpath_deps;
  54
  55                 protected BuildProvider()
  56                 {
  57                         ref_assemblies = new ArrayList ();
  58                 }
  59
  60                 internal void SetVirtualPath (string path)
  61                 {
  62                         virtual_path = path;
  63                 }
  64
  65                 public virtual void GenerateCode (AssemblyBuilder assemblyBuilder)
  66                 {
  67                 }
  68
  69                 public virtual string GetCustomString (CompilerResults results)
  70                 {
  71                         return null;
  72                 }
  73
  74                 protected CompilerType GetDefaultCompilerType ()
  75                 {
  76                         CompilationSection config;
  77                         config = (CompilationSection) WebConfigurationManager.GetSection ("system.web/compilation");
  78                         return GetDefaultCompilerTypeForLanguage (config.DefaultLanguage, config);
  79                 }
  80
  81                 void SetCommonParameters (CompilationSection config, CompilerParameters p)
  82                 {
  83                         p.IncludeDebugInformation = config.Debug;
  84                         foreach (AssemblyInfo info in config.Assemblies) {
  85                                 if (info.Assembly != "*") {
  86                                         p.ReferencedAssemblies.Add (info.Assembly);
  87                                         ref_assemblies.Add (info.Assembly);
  88                                 } else {
  89                                         AddAssembliesInBin (p.ReferencedAssemblies);
  90                                 }
  91                         }
  92
  93                         // explicit, strict?
  94                         // embedded? linked?/resources
  95                 }
  96
  97
  98                 static void InitPath ()
  99                 {
 100                         lock (locker) {
 101                                 if (private_bin_path != null)
 102                                         return;
 103
 104                                 AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
 105                                 private_bin_path = Path.Combine (setup.ApplicationBase, setup.PrivateBinPath);
 106                         }
 107                 }
 108
 109                 void AddAssembliesInBin (StringCollection coll)
 110                 {
 111                         InitPath ();
 112                         if (!Directory.Exists (private_bin_path))
 113                                 return;
 114
 115                         string [] binDlls = Directory.GetFiles (private_bin_path, "*.dll");
 116                         foreach (string s in binDlls) {
 117                                 coll.Add (s);
 118                                 ref_assemblies.Add (s);
 119                         }
 120                 }
 121
 122                 internal CompilerType GetDefaultCompilerTypeForLanguage (string language, CompilationSection configSection)
 123                 {
 124                         // MS throws when accesing a Hashtable, we do here.
 125                         if (language == null || language == "")
 126                                 throw new ArgumentNullException ("language");
 127
 128                         CompilationSection config;
 129                         if (configSection == null)
 130                                 config = WebConfigurationManager.GetSection ("system.web/compilation") as CompilationSection;
 131                         else
 132                                 config = configSection;
 133
 134                         Compiler compiler = config.Compilers.Get (language);
 135                         CompilerParameters p;
 136                         if (compiler != null) {
 137                                 Type type = Type.GetType (compiler.Type, true);
 138                                 p = new CompilerParameters ();
 139                                 p.CompilerOptions = compiler.CompilerOptions;
 140                                 p.WarningLevel = compiler.WarningLevel;
 141                                 SetCommonParameters (config, p);
 142                                 return new CompilerType (type, p);
 143                         }
 144
 145                         if (!CodeDomProvider.IsDefinedLanguage (language))
 146                                 throw new HttpException (String.Format ("No compiler for language '{0}'.", language));
 147
 148                         CompilerInfo info = CodeDomProvider.GetCompilerInfo (language);
 149                         CompilerParameters par = info.CreateDefaultCompilerParameters ();
 150                         SetCommonParameters (config, par);
 151                         return new CompilerType (info.CodeDomProviderType, par);
 152                 }
 153
 154                 protected CompilerType GetDefaultCompilerTypeForLanguage (string language)
 155                 {
 156                         return GetDefaultCompilerTypeForLanguage (language, null);
 157                 }
 158
 159                 public virtual Type GetGeneratedType (CompilerResults results)
 160                 {
 161                         return null;
 162                 }
 163
 164                 public virtual BuildProviderResultFlags GetResultFlags (CompilerResults results)
 165                 {
 166                         return BuildProviderResultFlags.Default;
 167                 }
 168
 169                 protected TextReader OpenReader ()
 170                 {
 171                         return OpenReader (VirtualPath);
 172                 }
 173
 174                 protected TextReader OpenReader (string virtualPath)
 175                 {
 176                         Stream st = OpenStream (virtualPath);
 177                         return new StreamReader (st, WebEncoding.FileEncoding);
 178                 }
 179
 180                 protected Stream OpenStream ()
 181                 {
 182                         return OpenStream (VirtualPath);
 183                 }
 184
 185                 protected Stream OpenStream (string virtualPath)
 186                 {
 187                         // MS also throws a NullReferenceException here when not hosted.
 188                         return VirtualPathProvider.OpenFile (virtualPath);
 189                 }
 190
 191                 public virtual CompilerType CodeCompilerType {
 192                         get { return null; } // Documented to return null
 193                 }
 194
 195                 protected ICollection ReferencedAssemblies {
 196                         get { return ref_assemblies; }
 197                 }
 198
 199                 protected internal string VirtualPath {
 200                         get { return virtual_path; }
 201                 }
 202
 203                 public virtual ICollection VirtualPathDependencies {
 204                         get {
 205                                 if (vpath_deps == null)
 206                                         vpath_deps = new OneNullCollection ();
 207
 208                                 return vpath_deps;
 209                         }
 210                 }
 211         }
 212
 213         class OneNullCollection : ICollection {
 214                 public int Count {
 215                         get { return 1; }
 216                 }
 217
 218                 public bool IsSynchronized {
 219                         get { return false; }
 220                 }
 221
 222                 public object SyncRoot {
 223                         get { return this; }
 224                 }
 225
 226                 public void CopyTo (Array array, int index)
 227                 {
 228                         if (array == null)
 229                                 throw new ArgumentNullException ();
 230
 231                         if (index < 0)
 232                                 throw new ArgumentOutOfRangeException ();
 233
 234                         if (array.Rank > 1)
 235                                 throw new ArgumentException ();
 236
 237                         int length = array.Length;
 238                         if (index >= length || index > length - 1)
 239                                 throw new ArgumentException ();
 240
 241                         array.SetValue (null, index);
 242                 }
 243
 244                 public IEnumerator GetEnumerator ()
 245                 {
 246                         yield return null;
 247                 }
 248         }
 249 }
 250 #endif
 251