mcs/class/corlib/System.IO/FileSystemInfo.cs

   1 //------------------------------------------------------------------------------
   2 //
   3 // System.IO.FileSystemInfo.cs
   4 //
   5 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
   6 //
   7 // Author:         Jim Richardson, develop@wtfo-guru.com
   8 //                 Dan Lewis (dihlewis@yahoo.co.uk)
   9 // Created:        Monday, August 13, 2001
  10 //
  11 //------------------------------------------------------------------------------
  12
  13 //
  14 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36 using System;
  37 using System.Runtime.InteropServices;
  38 using System.Runtime.Serialization;
  39
  40 namespace System.IO {
  41
  42         [Serializable]
  43         public abstract class FileSystemInfo : MarshalByRefObject, ISerializable {
  44                 #region Implementation of ISerializable
  45
  46                 [ComVisible(false)]
  47                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
  48                 {
  49                         info.AddValue ("OriginalPath", OriginalPath, typeof(string));
  50                         info.AddValue ("FullPath", FullPath, typeof(string));
  51                 }
  52
  53                 #endregion Implementation of ISerializable
  54
  55                 // public properties
  56
  57                 public abstract bool Exists { get; }
  58
  59                 public abstract string Name { get; }
  60
  61                 public virtual string FullName {
  62                         get {
  63                                 return FullPath;
  64                         }
  65                 }
  66
  67                 public string Extension {
  68                         get {
  69                                 return Path.GetExtension (Name);
  70                         }
  71                 }
  72
  73                 public FileAttributes Attributes {
  74                         get {
  75                                 Refresh (false);
  76                                 return stat.Attributes;
  77                         }
  78
  79                         set {
  80                                 MonoIOError error;
  81
  82                                 if (!MonoIO.SetFileAttributes (FullName,
  83                                                                value,
  84                                                                out error))
  85                                         throw MonoIO.GetException (FullName,
  86                                                                    error);
  87                                 Refresh (true);
  88                         }
  89                 }
  90
  91                 public DateTime CreationTime {
  92                         get {
  93                                 Refresh (false);
  94                                 return DateTime.FromFileTime (stat.CreationTime);
  95                         }
  96
  97                         set {
  98                                 long filetime = value.ToFileTime ();
  99
 100                                 MonoIOError error;
 101
 102                                 if (!MonoIO.SetFileTime (FullName, filetime,
 103                                                          -1, -1, out error))
 104                                         throw MonoIO.GetException (FullName,
 105                                                                    error);
 106                                 Refresh (true);
 107                         }
 108                 }
 109
 110                 [ComVisible(false)]
 111                 public DateTime CreationTimeUtc {
 112                         get {
 113                                 return CreationTime.ToUniversalTime ();
 114                         }
 115
 116                         set {
 117                                 CreationTime = value.ToLocalTime ();
 118                         }
 119                 }
 120
 121                 public DateTime LastAccessTime {
 122                         get {
 123                                 Refresh (false);
 124                                 return DateTime.FromFileTime (stat.LastAccessTime);
 125                         }
 126
 127                         set {
 128                                 long filetime = value.ToFileTime ();
 129
 130                                 MonoIOError error;
 131
 132                                 if (!MonoIO.SetFileTime (FullName, -1,
 133                                                          filetime, -1,
 134                                                          out error))
 135                                         throw MonoIO.GetException (FullName,
 136                                                                    error);
 137                                 Refresh (true);
 138                         }
 139                 }
 140
 141                 [ComVisible(false)]
 142                 public DateTime LastAccessTimeUtc {
 143                         get {
 144                                 Refresh (false);
 145                                 return LastAccessTime.ToUniversalTime ();
 146                         }
 147
 148                         set {
 149                                 LastAccessTime = value.ToLocalTime ();
 150                         }
 151                 }
 152
 153                 public DateTime LastWriteTime {
 154                         get {
 155                                 Refresh (false);
 156                                 return DateTime.FromFileTime (stat.LastWriteTime);
 157                         }
 158
 159                         set {
 160                                 long filetime = value.ToFileTime ();
 161
 162                                 MonoIOError error;
 163
 164                                 if (!MonoIO.SetFileTime (FullName, -1, -1,
 165                                                          filetime, out error))
 166                                         throw MonoIO.GetException (FullName,
 167                                                                    error);
 168                                 Refresh (true);
 169                         }
 170                 }
 171
 172                 [ComVisible(false)]
 173                 public DateTime LastWriteTimeUtc {
 174                         get {
 175                                 Refresh (false);
 176                                 return LastWriteTime.ToUniversalTime ();
 177                         }
 178
 179                         set {
 180                                 LastWriteTime = value.ToLocalTime ();
 181                         }
 182                 }
 183
 184                 // public methods
 185
 186                 public abstract void Delete ();
 187
 188                 public void Refresh ()
 189                 {
 190                         Refresh (true);
 191                 }
 192
 193                 // protected
 194
 195                 protected FileSystemInfo ()
 196                 {
 197                         this.valid = false;
 198                         this.FullPath = null;
 199                 }
 200
 201                 protected FileSystemInfo (SerializationInfo info, StreamingContext context)
 202                 {
 203                         if (info == null)
 204                         {
 205                                 throw new ArgumentNullException("info");
 206                         }
 207
 208                         FullPath = info.GetString("FullPath");
 209                         OriginalPath = info.GetString("OriginalPath");
 210                 }
 211
 212                 protected string FullPath;
 213                 protected string OriginalPath;
 214
 215                 // internal
 216
 217                 internal void Refresh (bool force)
 218                 {
 219                         if (valid && !force)
 220                                 return;
 221
 222                         MonoIOError error;
 223
 224                         MonoIO.GetFileStat (FullName, out stat, out error);
 225                         /* Don't throw on error here, too much other
 226                          * stuff relies on it not doing so...
 227                          */
 228
 229                         valid = true;
 230
 231                         InternalRefresh ();
 232                 }
 233
 234                 internal virtual void InternalRefresh ()
 235                 {
 236                 }
 237
 238                 internal void CheckPath (string path)
 239                 {
 240                         if (path == null)
 241                                 throw new ArgumentNullException ();
 242                         if (path.IndexOfAny (Path.InvalidPathChars) != -1)
 243                                 throw new ArgumentException ("Invalid characters in path.");
 244                 }
 245
 246                 internal MonoIOStat stat;
 247                 internal bool valid;
 248         }
 249 }