mcs/class/System/System.CodeDom.Compiler/TempFileCollection.cs

   1 //
   2 // System.CodeDom.Compiler TempFileCollection Class implementation
   3 //
   4 // Author:
   5 //      Dick Porter (dick@ximian.com)
   6 //
   7 // (C) Copyright 2003 Ximian, Inc.
   8 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Collections;
  31 using System.IO;
  32 using System.Security;
  33 using System.Security.Permissions;
  34
  35 namespace System.CodeDom.Compiler {
  36
  37 #if NET_2_0
  38         [Serializable]
  39 #endif
  40         [PermissionSet (SecurityAction.LinkDemand, Unrestricted = true)]
  41         public class TempFileCollection:ICollection, IEnumerable, IDisposable
  42         {
  43                 Hashtable filehash;
  44                 string tempdir;
  45                 bool keepfiles;
  46                 string basepath;
  47                 Random rnd;
  48
  49                 public TempFileCollection ()
  50                         : this (String.Empty, false)
  51                 {
  52                 }
  53
  54                 public TempFileCollection(string tempDir)
  55                         : this (tempDir, false)
  56                 {
  57                 }
  58
  59                 public TempFileCollection(string tempDir, bool keepFiles)
  60                 {
  61                         filehash=new Hashtable();
  62                         tempdir = (tempDir == null) ? String.Empty : tempDir;
  63                         keepfiles=keepFiles;
  64                 }
  65
  66                 public string BasePath
  67                 {
  68                         get {
  69                                 if(basepath==null) {
  70                                         // note: this property *cannot* change TempDir property
  71                                         string temp = tempdir;
  72                                         if (temp.Length == 0) {
  73                                                 // this call ensure the Environment permissions check
  74                                                 temp = Path.GetTempPath ();
  75                                         }
  76
  77                                         if (rnd == null)
  78                                                 rnd = new Random ();
  79
  80                                         string random = rnd.Next (10000,99999).ToString ();
  81                                         basepath = Path.Combine (temp, random);
  82
  83                                         // and you must have discovery access to the combined path
  84                                         // note: the cache behaviour is tested in the CAS tests
  85                                         if (SecurityManager.SecurityEnabled) {
  86                                                 new FileIOPermission (FileIOPermissionAccess.PathDiscovery, basepath).Demand ();
  87                                         }
  88                                 }
  89
  90                                 return(basepath);
  91                         }
  92                 }
  93
  94                 public int Count
  95                 {
  96                         get {
  97                                 return(filehash.Count);
  98                         }
  99                 }
 100
 101                 public bool KeepFiles
 102                 {
 103                         get {
 104                                 return(keepfiles);
 105                         }
 106                         set {
 107                                 keepfiles=value;
 108                         }
 109                 }
 110
 111                 public string TempDir
 112                 {
 113                         get {
 114                                 // note: we only return what we were supplied so there
 115                                 // is no permission protecting this information
 116                                 return tempdir;
 117                         }
 118                 }
 119
 120                 public string AddExtension(string fileExtension)
 121                 {
 122                         return(AddExtension(fileExtension, keepfiles));
 123                 }
 124
 125                 public string AddExtension(string fileExtension, bool keepFile)
 126                 {
 127                         string filename=BasePath+"."+fileExtension;
 128                         AddFile(filename, keepFile);
 129                         return(filename);
 130                 }
 131
 132                 public void AddFile(string fileName, bool keepFile)
 133                 {
 134                         filehash.Add(fileName, keepFile);
 135                 }
 136
 137                 public void CopyTo(string[] fileNames, int start)
 138                 {
 139                         filehash.Keys.CopyTo(fileNames, start);
 140                 }
 141
 142                 void ICollection.CopyTo(Array array, int start)
 143                 {
 144                         filehash.Keys.CopyTo(array, start);
 145                 }
 146
 147                 object ICollection.SyncRoot {
 148                         get {
 149                                 return null;
 150                         }
 151                 }
 152
 153                 bool ICollection.IsSynchronized {
 154                         get {
 155                                 return(false);
 156                         }
 157                 }
 158
 159                 void IDisposable.Dispose()
 160                 {
 161                         Dispose(true);
 162                 }
 163
 164                 public void Delete()
 165                 {
 166                         string[] filenames=new string[filehash.Count];
 167                         filehash.Keys.CopyTo(filenames, 0);
 168
 169                         foreach(string file in filenames) {
 170                                 if((bool)filehash[file]==false) {
 171                                         File.Delete(file);
 172                                         filehash.Remove(file);
 173                                 }
 174                         }
 175                 }
 176
 177                 public IEnumerator GetEnumerator()
 178                 {
 179                         return(filehash.Keys.GetEnumerator());
 180                 }
 181
 182                 protected virtual void Dispose(bool disposing)
 183                 {
 184                         Delete();
 185                         if (disposing) {
 186                                 GC.SuppressFinalize (true);
 187                         }
 188                 }
 189
 190                 ~TempFileCollection()
 191                 {
 192                         Dispose(false);
 193                 }
 194
 195         }
 196 }