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

   1 //------------------------------------------------------------------------------\r
   2 // \r
   3 // System.IO.FileInfo.cs \r
   4 //\r
   5 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved\r
   6 // \r
   7 // Author:         Jim Richardson, develop@wtfo-guru.com\r
   8 //                 Dan Lewis (dihlewis@yahoo.co.uk)\r
   9 // Created:        Monday, August 13, 2001 \r
  10 //\r
  11 //------------------------------------------------------------------------------\r
  12 \r
  13 using System;\r
  14 \r
  15 namespace System.IO {\r
  16 \r
  17         [Serializable]
  18         public sealed class FileInfo : FileSystemInfo {\r
  19         \r
  20
  21                 private bool exists;
  22
  23                 public FileInfo (string path) {\r
  24                         CheckPath (path);\r
  25                 \r
  26                         OriginalPath = path;\r
  27                         FullPath = Path.GetFullPath (path);
  28                 }\r
  29                 \r
  30                 internal override void InternalRefresh ()\r
  31                 {\r
  32                         exists = File.Exists (FullPath);\r
  33                 }\r
  34 \r
  35 \r
  36                 // public properties\r
  37 \r
  38                 public override bool Exists {\r
  39                         get {\r
  40                                 Refresh (false);\r
  41 \r
  42                                 if (stat.Attributes == MonoIO.InvalidFileAttributes)\r
  43                                         return false;\r
  44 \r
  45                                 if ((stat.Attributes & FileAttributes.Directory) != 0)\r
  46                                         return false;\r
  47 \r
  48                                 return exists;
  49                         }\r
  50                 }\r
  51 \r
  52                 public override string Name {\r
  53                         get {\r
  54                                 return Path.GetFileName (FullPath);\r
  55                         }\r
  56                 }\r
  57 \r
  58                 public long Length {\r
  59                         get {\r
  60                                 if (!Exists)\r
  61                                         throw new FileNotFoundException ("Could not find file \"" + OriginalPath + "\".");\r
  62 \r
  63                                 return stat.Length;\r
  64                         }\r
  65                 }\r
  66 \r
  67                 public string DirectoryName {\r
  68                         get {\r
  69                                 return Path.GetDirectoryName (FullPath);\r
  70                         }\r
  71                 }\r
  72 \r
  73                 public DirectoryInfo Directory {\r
  74                         get {\r
  75                                 return new DirectoryInfo (DirectoryName);\r
  76                         }\r
  77                 }\r
  78 \r
  79                 // streamreader methods\r
  80 \r
  81                 public StreamReader OpenText () {\r
  82                         return new StreamReader (Open (FileMode.Open, FileAccess.Read));\r
  83                 }\r
  84 \r
  85                 public StreamWriter CreateText () {\r
  86                         return new StreamWriter (Open (FileMode.Create, FileAccess.Write));\r
  87                 }\r
  88                 \r
  89                 public StreamWriter AppendText () {\r
  90                         return new StreamWriter (Open (FileMode.Append, FileAccess.Write));\r
  91                 }\r
  92 \r
  93                 // filestream methods\r
  94
  95                 public FileStream Create ()
  96                 {
  97                         return File.Create (FullPath);
  98                 }
  99
 100                 \r
 101                 public FileStream OpenRead () {\r
 102                         return Open (FileMode.Open, FileAccess.Read);\r
 103                 }\r
 104 \r
 105                 public FileStream OpenWrite () {\r
 106                         return Open (FileMode.OpenOrCreate, FileAccess.Write);\r
 107                 }\r
 108 \r
 109                 public FileStream Open (FileMode mode) {\r
 110                         return Open (mode, FileAccess.ReadWrite);\r
 111                 }\r
 112 \r
 113                 public FileStream Open (FileMode mode, FileAccess access) {\r
 114                         return Open (mode, access, FileShare.None);\r
 115                 }\r
 116 \r
 117                 public FileStream Open (FileMode mode, FileAccess access, FileShare share) {\r
 118                         return new FileStream (FullPath, mode, access, share);\r
 119                 }\r
 120 \r
 121                 // file methods\r
 122
 123                 public override void Delete () {
 124                         MonoIOError error;
 125
 126                         if (!MonoIO.Exists (FullPath, out error)) {
 127                                 // a weird MS.NET behaviour
 128                                 return;
 129                         }
 130
 131                         if (MonoIO.ExistsDirectory (FullPath, out error)) {
 132                                 throw new UnauthorizedAccessException ("Access to the path \"" + FullPath + "\" is denied.");
 133                         }
 134
 135                         if (!MonoIO.DeleteFile (FullPath, out error)) {
 136                                 throw MonoIO.GetException (OriginalPath,
 137                                                            error);
 138                         }
 139                 }
 140
 141                 public void MoveTo (string dest) {
 142                         if (dest == null)
 143                                 throw new ArgumentNullException ();
 144                         MonoIOError error;
 145                         if (MonoIO.Exists (dest, out error) ||
 146                                 MonoIO.ExistsDirectory (dest, out error))
 147                                 throw new IOException ();
 148                         File.Move (FullPath, dest);
 149                         this.FullPath = Path.GetFullPath (dest);
 150                 }
 151
 152                 public FileInfo CopyTo (string path) {\r
 153                         return CopyTo (path, false);\r
 154                 }\r
 155 \r
 156                 public FileInfo CopyTo (string path, bool overwrite) {\r
 157                         string dest = Path.GetFullPath (path);\r
 158
 159                         if (overwrite && File.Exists (path))
 160                                 File.Delete (path);
 161
 162                         File.Copy (FullPath, dest);\r
 163                 \r
 164                         return new FileInfo (dest);\r
 165                 }\r
 166 \r
 167                 public override string ToString () {\r
 168                         return OriginalPath;\r
 169                 }\r
 170         }\r
 171 }\r