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

   1 //------------------------------------------------------------------------------
   2 //
   3 // System.IO.FileInfo.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
  38 namespace System.IO {
  39
  40         [Serializable]
  41         public sealed class FileInfo : FileSystemInfo {
  42
  43
  44                 private bool exists;
  45
  46                 public FileInfo (string path) {
  47                         CheckPath (path);
  48
  49                         OriginalPath = path;
  50                         FullPath = Path.GetFullPath (path);
  51                 }
  52
  53                 internal override void InternalRefresh ()
  54                 {
  55                         exists = File.Exists (FullPath);
  56                 }
  57
  58
  59                 // public properties
  60
  61                 public override bool Exists {
  62                         get {
  63                                 Refresh (false);
  64
  65                                 if (stat.Attributes == MonoIO.InvalidFileAttributes)
  66                                         return false;
  67
  68                                 if ((stat.Attributes & FileAttributes.Directory) != 0)
  69                                         return false;
  70
  71                                 return exists;
  72                         }
  73                 }
  74
  75                 public override string Name {
  76                         get {
  77                                 return Path.GetFileName (FullPath);
  78                         }
  79                 }
  80
  81 #if NET_2_0
  82                 public bool IsReadOnly {
  83                         get {
  84                                 if (!Exists)
  85                                         throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
  86
  87                                 return ((stat.Attributes & FileAttributes.ReadOnly) != 0);
  88                         }
  89
  90                         set {
  91                                 if (!Exists)
  92                                         throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
  93
  94                                 FileAttributes attrs = File.GetAttributes(FullPath);
  95
  96                                 if (value)
  97                                         attrs |= FileAttributes.ReadOnly;
  98                                 else
  99                                         attrs &= ~FileAttributes.ReadOnly;
 100
 101                                 File.SetAttributes(FullPath, attrs);
 102                         }
 103                 }
 104
 105                 void NotSupported ()
 106                 {
 107                         throw new NotSupportedException ("Mono does not support this operation");
 108                 }
 109
 110                 public void Encrypt ()
 111                 {
 112                         NotSupported ();
 113                 }
 114
 115                 public void Decrypt ()
 116                 {
 117                         NotSupported ();
 118                 }
 119 #endif
 120
 121                 public long Length {
 122                         get {
 123                                 if (!Exists)
 124                                         throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
 125
 126                                 return stat.Length;
 127                         }
 128                 }
 129
 130                 public string DirectoryName {
 131                         get {
 132                                 return Path.GetDirectoryName (FullPath);
 133                         }
 134                 }
 135
 136                 public DirectoryInfo Directory {
 137                         get {
 138                                 return new DirectoryInfo (DirectoryName);
 139                         }
 140                 }
 141
 142                 // streamreader methods
 143
 144                 public StreamReader OpenText () {
 145                         return new StreamReader (Open (FileMode.Open, FileAccess.Read));
 146                 }
 147
 148                 public StreamWriter CreateText () {
 149                         return new StreamWriter (Open (FileMode.Create, FileAccess.Write));
 150                 }
 151
 152                 public StreamWriter AppendText () {
 153                         return new StreamWriter (Open (FileMode.Append, FileAccess.Write));
 154                 }
 155
 156                 // filestream methods
 157
 158                 public FileStream Create ()
 159                 {
 160                         return File.Create (FullPath);
 161                 }
 162
 163
 164                 public FileStream OpenRead () {
 165                         return Open (FileMode.Open, FileAccess.Read, FileShare.Read);
 166                 }
 167
 168                 public FileStream OpenWrite () {
 169                         return Open (FileMode.OpenOrCreate, FileAccess.Write);
 170                 }
 171
 172                 public FileStream Open (FileMode mode) {
 173                         return Open (mode, FileAccess.ReadWrite);
 174                 }
 175
 176                 public FileStream Open (FileMode mode, FileAccess access) {
 177                         return Open (mode, access, FileShare.None);
 178                 }
 179
 180                 public FileStream Open (FileMode mode, FileAccess access, FileShare share) {
 181                         return new FileStream (FullPath, mode, access, share);
 182                 }
 183
 184                 // file methods
 185
 186                 public override void Delete () {
 187                         MonoIOError error;
 188
 189                         if (!MonoIO.Exists (FullPath, out error)) {
 190                                 // a weird MS.NET behaviour
 191                                 return;
 192                         }
 193
 194                         if (MonoIO.ExistsDirectory (FullPath, out error)) {
 195                                 throw new UnauthorizedAccessException ("Access to the path \"" + FullPath + "\" is denied.");
 196                         }
 197
 198                         if (!MonoIO.DeleteFile (FullPath, out error)) {
 199                                 throw MonoIO.GetException (OriginalPath,
 200                                                            error);
 201                         }
 202                 }
 203
 204                 public void MoveTo (string dest) {
 205
 206                         if (dest == null)
 207                                 throw new ArgumentNullException ();
 208
 209                         if (dest == Name || dest == FullName)
 210                                 return;
 211
 212                         MonoIOError error;
 213                         if (MonoIO.Exists (dest, out error) ||
 214                                 MonoIO.ExistsDirectory (dest, out error))
 215                                 throw new IOException ();
 216                         File.Move (FullPath, dest);
 217                         this.FullPath = Path.GetFullPath (dest);
 218                 }
 219
 220                 public FileInfo CopyTo (string path) {
 221                         return CopyTo (path, false);
 222                 }
 223
 224                 public FileInfo CopyTo (string path, bool overwrite) {
 225                         string dest = Path.GetFullPath (path);
 226
 227                         if (overwrite && File.Exists (path))
 228                                 File.Delete (path);
 229
 230                         File.Copy (FullPath, dest);
 231
 232                         return new FileInfo (dest);
 233                 }
 234
 235                 public override string ToString () {
 236                         return OriginalPath;
 237                 }
 238         }
 239 }