mcs/class/System.IO.Compression/ZipArchiveEntry.cs

   1 //
   2 // ZipArchiveEntry.cs
   3 //
   4 // Author:
   5 //       Joao Matos <joao.matos@xamarin.com>
   6 //       Martin Baulig <martin.baulig@xamarin.com>
   7 //
   8 // Copyright (c) 2013 Xamarin Inc. (http://www.xamarin.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining a copy
  11 // of this software and associated documentation files (the "Software"), to deal
  12 // in the Software without restriction, including without limitation the rights
  13 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14 // copies of the Software, and to permit persons to whom the Software is
  15 // furnished to do so, subject to the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be included in
  18 // all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26 // THE SOFTWARE.
  27
  28 using SharpCompress.Archive;
  29
  30 namespace System.IO.Compression
  31 {
  32         public class ZipArchiveEntry
  33         {
  34                 readonly SharpCompress.Archive.Zip.ZipArchiveEntry entry;
  35                 private Stream openStream;
  36                 private bool wasDeleted;
  37
  38                 internal ZipArchiveEntry(ZipArchive     archive, SharpCompress.Archive.Zip.ZipArchiveEntry entry)
  39                 {
  40                         if (archive == null)
  41                                 throw new ArgumentNullException("archive");
  42
  43                         if (entry == null)
  44                                 throw new ArgumentNullException("entry");
  45
  46                         Archive = archive;
  47                         this.entry = entry;
  48                 }
  49
  50                 public ZipArchive Archive {
  51                         get;
  52                         private set;
  53                 }
  54
  55                 public long CompressedLength {
  56                         get {
  57                                 if (Archive.Mode == ZipArchiveMode.Create)
  58                                         throw new InvalidOperationException("Property cannot be retrieved when the mode is set to Create");
  59
  60                                 return entry.CompressedSize;
  61                         }
  62                 }
  63
  64                 public string FullName {
  65                         get { return entry.Key; }
  66                 }
  67
  68                 public DateTimeOffset LastWriteTime {
  69                         get { return entry.LastModifiedTime.GetValueOrDefault(); }
  70                         set { entry.LastModifiedTime = value.DateTime; }
  71                 }
  72
  73                 public long Length {
  74                         get {
  75                                 if (Archive.Mode == ZipArchiveMode.Create)
  76                                         throw new InvalidOperationException("Property cannot be retrieved when the mode is set to Create");
  77
  78                                 return entry.Size;
  79                         }
  80                 }
  81
  82                 public string Name {
  83                         get { return Path.GetFileName(entry.Key); }
  84                 }
  85
  86                 public void Delete()
  87                 {
  88                         if (Archive.disposed)
  89                                 throw new ObjectDisposedException("The zip archive for this entry has been disposed.");
  90
  91                         if (Archive.Mode !=     ZipArchiveMode.Update)
  92                                 throw new NotSupportedException("The zip archive for this entry was opened in a mode other than Update.");
  93
  94                         if (openStream != null)
  95                                 throw new IOException("The entry is already open for reading or writing.");
  96
  97                         wasDeleted = true;
  98                         Archive.zipFile.RemoveEntry(entry);
  99                 }
 100
 101                 public Stream Open()
 102                 {
 103                         if (Archive.disposed)
 104                                 throw new ObjectDisposedException("The zip archive for this entry has been disposed.");
 105
 106                         if (openStream != null && Archive.Mode == ZipArchiveMode.Update)
 107                                 throw new IOException("The entry is already currently open for writing.");
 108
 109                         if (wasDeleted)
 110                                 throw new IOException("The entry has been deleted from the archive.");
 111
 112                         if (Archive.Mode == ZipArchiveMode.Create && openStream != null)
 113                                 throw new IOException("The archive for this entry was opened with the Create mode, and this entry has already been written to.");
 114
 115                         openStream = entry.OpenEntryStream();
 116
 117                         return openStream;
 118                 }
 119         }
 120 }