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 // Created:        Monday, August 13, 2001 \r
   9 //\r
  10 //------------------------------------------------------------------------------\r
  11 \r
  12 using System;
  13 using System.Private;\r
  14 using System.IO.Private;
  15 using System.Diagnostics;
  16 using System.Security.Permissions;
  17 \r
  18 namespace System.IO\r
  19 {\r
  20         /// <summary>\r
  21         /// \r
  22         /// </summary>\r
  23         public sealed class FileInfo : FileSystemInfo\r
  24         {\r
  25                 public FileInfo(string fileName)\r
  26                 {
  27                         CheckArgument.Path(fileName, false);
  28                         //LAMESPEC: Does not throw security exception in constructor
  29                         OriginalPath = fileName;
  30                 }\r
  31
  32                 private bool existsOnDisk(bool exNotFound, bool exIsDirectory)
  33                 {
  34                         bool bRetCode;
  35
  36                         try
  37                         {
  38                                 Refresh();
  39                                 if((getAttributes() & FileAttributes.Directory) != 0)
  40                                 {
  41                                         if(exIsDirectory)
  42                                         {
  43                                                 throw new UnauthorizedAccessException();
  44                                         }
  45                                         bRetCode = false;
  46                                 }
  47                                 else
  48                                 {
  49                                         bRetCode = true;
  50                                 }
  51                         }
  52                         catch(ArgumentException ex)
  53                         {
  54                                 Debug.WriteLine(ex); // eliminates not used warning
  55                                 if(exNotFound)
  56                                 {
  57                                         throw new FileNotFoundException();
  58                                 }
  59                                 bRetCode = false;
  60                         }
  61                         return bRetCode;
  62                 }
  63
  64                 public override bool Exists\r
  65                 {
  66                         get
  67                         {
  68                                 return existsOnDisk(false, false);
  69                         }
  70                 }\r
  71 \r
  72                 public override string Name\r
  73                 {\r
  74                         get\r
  75                         {
  76                                 return Path.GetFileName(getPathName());\r
  77                         }\r
  78                 }\r
  79 \r
  80                 /// <summary>\r
  81                 /// Gets the parent directory info\r
  82                 /// </summary>\r
  83                 public DirectoryInfo Directory\r
  84                 {\r
  85                         get\r
  86                         {\r
  87                                 return new DirectoryInfo(Path.GetDirectoryName(getPathName()));\r
  88                         }\r
  89                 }\r
  90 \r
  91                 /// <summary>\r
  92                 /// Get the path of the file\r
  93                 /// </summary>\r
  94                 public string DirectoryName\r
  95                 {\r
  96                         get\r
  97                         {\r
  98                                 return Path.GetDirectoryName(getPathName());\r
  99                         }\r
 100                 }\r
 101 \r
 102                 /// <summary>\r
 103                 /// Get the length of the file\r
 104                 /// </summary>\r
 105                 public long Length\r
 106                 {\r
 107                         get\r
 108                         {
 109                                 try
 110                                 {
 111                                         Refresh();
 112                                 }
 113                                 catch(ArgumentException ex)
 114                                 {
 115                                         Debug.WriteLine(ex); // eliminates not used compiler warning
 116                                         throw new FileNotFoundException();
 117                                 }
 118                                 return status.st_size;
 119                         }\r
 120                 }\r
 121
 122                 public StreamWriter AppendText()\r
 123                 {       // TODO: verify using correct FileMode here might be Create & Append
 124                         return new StreamWriter(Open(FileMode.Append, FileAccess.Write));
 125                 }\r
 126                 \r
 127                 public FileStream Create()\r
 128                 {
 129                         // TODO: verify using correct FileMode here
 130                         return Open(FileMode.OpenOrCreate, FileAccess.ReadWrite);\r
 131                 }\r
 132 \r
 133                 public StreamWriter CreateText()\r
 134                 {       //TODO: According to doc even CreateText throws a file not found ex
 135                         //      sounds suspicious so i'll have to check it out later
 136                         //existsOnDisk(true, true); // throw not found, is directory
 137                         return new StreamWriter(Open(FileMode.Create, FileAccess.Write));
 138                 }\r
 139                 \r
 140                 public FileStream Open(FileMode mode)\r
 141                 {\r
 142                         return Open(mode, FileAccess.ReadWrite);\r
 143                 }\r
 144 \r
 145                 public FileStream Open(FileMode mode, FileAccess access)\r
 146                 {\r
 147                         return Open(mode, access, FileShare.None);\r
 148                 }
 149
 150                 public FileStream Open(FileMode mode, FileAccess access, FileShare share)\r
 151                 {
 152                         bool bExists = existsOnDisk(false, true); // throw is directory;
 153                         string path = getPathName();
 154                     CheckPermission.ModeAccess(mode, access, path, bExists);                    \r
 155                         return new FileStream(path, mode, access, share);\r
 156                 }\r
 157 \r
 158                 public FileStream OpenRead()\r
 159                 {       // TODO: find out what default share should be\r
 160                         return Open(FileMode.Open, FileAccess.Read, FileShare.Read);\r
 161                 }\r
 162 \r
 163                 public StreamReader OpenText()\r
 164                 {       // TODO: verify mode and access values
 165                         return new StreamReader(Open(FileMode.OpenOrCreate, FileAccess.ReadWrite));
 166                 }\r
 167 \r
 168                 public FileStream OpenWrite()\r
 169                 {\r
 170                         return Open(FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);\r
 171                 }\r
 172 \r
 173                 public FileInfo CopyTo(string destFile)\r
 174                 {\r
 175                         return CopyTo(destFile, false);\r
 176                 }\r
 177 \r
 178                 public FileInfo CopyTo(string destFile, bool bOverwrite)\r
 179                 {       // TODO: Implement\r
 180                         return null;\r
 181                 }\r
 182 \r
 183                 public override void Delete()\r
 184                 {
 185                         existsOnDisk(true, true); // throw not found, is directory
 186                         CheckPermission.Demand(FileIOPermissionAccess.AllAccess, getPathName());
 187                         Wrapper.unlink(getPathName());
 188                 }\r
 189 \r
 190                 public void MoveTo(string destName)\r
 191                 {       // TODO: Implement\r
 192                 }\r
 193         }\r
 194 }\r