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                 public long Length {
  82                         get {
  83                                 if (!Exists)
  84                                         throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".", OriginalPath);
  85
  86                                 return stat.Length;
  87                         }
  88                 }
  89
  90                 public string DirectoryName {
  91                         get {
  92                                 return Path.GetDirectoryName (FullPath);
  93                         }
  94                 }
  95
  96                 public DirectoryInfo Directory {
  97                         get {
  98                                 return new DirectoryInfo (DirectoryName);
  99                         }
 100                 }
 101
 102                 // streamreader methods
 103
 104                 public StreamReader OpenText () {
 105                         return new StreamReader (Open (FileMode.Open, FileAccess.Read));
 106                 }
 107
 108                 public StreamWriter CreateText () {
 109                         return new StreamWriter (Open (FileMode.Create, FileAccess.Write));
 110                 }
 111
 112                 public StreamWriter AppendText () {
 113                         return new StreamWriter (Open (FileMode.Append, FileAccess.Write));
 114                 }
 115
 116                 // filestream methods
 117
 118                 public FileStream Create ()
 119                 {
 120                         return File.Create (FullPath);
 121                 }
 122
 123
 124                 public FileStream OpenRead () {
 125                         return Open (FileMode.Open, FileAccess.Read);
 126                 }
 127
 128                 public FileStream OpenWrite () {
 129                         return Open (FileMode.OpenOrCreate, FileAccess.Write);
 130                 }
 131
 132                 public FileStream Open (FileMode mode) {
 133                         return Open (mode, FileAccess.ReadWrite);
 134                 }
 135
 136                 public FileStream Open (FileMode mode, FileAccess access) {
 137                         return Open (mode, access, FileShare.None);
 138                 }
 139
 140                 public FileStream Open (FileMode mode, FileAccess access, FileShare share) {
 141                         return new FileStream (FullPath, mode, access, share);
 142                 }
 143
 144                 // file methods
 145
 146                 public override void Delete () {
 147                         MonoIOError error;
 148
 149                         if (!MonoIO.Exists (FullPath, out error)) {
 150                                 // a weird MS.NET behaviour
 151                                 return;
 152                         }
 153
 154                         if (MonoIO.ExistsDirectory (FullPath, out error)) {
 155                                 throw new UnauthorizedAccessException ("Access to the path \"" + FullPath + "\" is denied.");
 156                         }
 157
 158                         if (!MonoIO.DeleteFile (FullPath, out error)) {
 159                                 throw MonoIO.GetException (OriginalPath,
 160                                                            error);
 161                         }
 162                 }
 163
 164                 public void MoveTo (string dest) {
 165
 166                         if (dest == null)
 167                                 throw new ArgumentNullException ();
 168
 169                         if (dest == Name || dest == FullName)
 170                                 return;
 171
 172                         MonoIOError error;
 173                         if (MonoIO.Exists (dest, out error) ||
 174                                 MonoIO.ExistsDirectory (dest, out error))
 175                                 throw new IOException ();
 176                         File.Move (FullPath, dest);
 177                         this.FullPath = Path.GetFullPath (dest);
 178                 }
 179
 180                 public FileInfo CopyTo (string path) {
 181                         return CopyTo (path, false);
 182                 }
 183
 184                 public FileInfo CopyTo (string path, bool overwrite) {
 185                         string dest = Path.GetFullPath (path);
 186
 187                         if (overwrite && File.Exists (path))
 188                                 File.Delete (path);
 189
 190                         File.Copy (FullPath, dest);
 191
 192                         return new FileInfo (dest);
 193                 }
 194
 195                 public override string ToString () {
 196                         return OriginalPath;
 197                 }
 198         }
 199 }