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         internal class ZipArchiveEntryStream : Stream, IDisposable
  33         {
  34                 private readonly ZipArchiveEntry entry;
  35                 private readonly Stream stream;
  36
  37                 public override bool CanRead {
  38                         get {
  39                                 return stream.CanRead;
  40                         }
  41                 }
  42
  43                 public override bool CanSeek {
  44                         get {
  45                                 return stream.CanSeek;
  46                         }
  47                 }
  48
  49                 public override bool CanWrite {
  50                         get {
  51                                 return stream.CanWrite;
  52                         }
  53                 }
  54
  55                 public override long Length {
  56                         get {
  57                                 return stream.Length;
  58                         }
  59                 }
  60
  61                 public override long Position {
  62                         get {
  63                                 return stream.Position;
  64                         }
  65                         set {
  66                                 stream.Position = value;
  67                         }
  68                 }
  69
  70                 public ZipArchiveEntryStream(ZipArchiveEntry entry, Stream stream)
  71                 {
  72                         this.entry = entry;
  73                         this.stream = stream;
  74                 }
  75
  76                 public override void Flush ()
  77                 {
  78                         stream.Flush();
  79                 }
  80
  81                 public override long Seek (long offset, SeekOrigin origin)
  82                 {
  83                         return stream.Seek(offset, origin);
  84                 }
  85
  86                 public override void SetLength (long value)
  87                 {
  88                         stream.SetLength(value);
  89                 }
  90
  91                 public override int Read (byte[] buffer, int offset, int count)
  92                 {
  93                         return stream.Read(buffer, offset, count);
  94                 }
  95
  96                 public override void Write (byte[] buffer, int offset, int count)
  97                 {
  98                         stream.Write(buffer, offset, count);
  99                 }
 100
 101                 public new void Dispose()
 102                 {
 103                         Dispose(true);
 104                         GC.SuppressFinalize(this);
 105                         base.Dispose();
 106                 }
 107
 108                 protected override void Dispose(bool disposing)
 109                 {
 110                         if (disposing)
 111                         {
 112                                 entry.openStream = null;
 113                                 stream.Dispose();
 114                         }
 115                 }
 116         }
 117
 118         public class ZipArchiveEntry
 119         {
 120                 readonly SharpCompress.Archive.Zip.ZipArchiveEntry entry;
 121                 internal ZipArchiveEntryStream openStream;
 122                 private bool wasDeleted;
 123
 124                 internal ZipArchiveEntry(ZipArchive     archive, SharpCompress.Archive.Zip.ZipArchiveEntry entry)
 125                 {
 126                         if (archive == null)
 127                                 throw new ArgumentNullException("archive");
 128
 129                         if (entry == null)
 130                                 throw new ArgumentNullException("entry");
 131
 132                         Archive = archive;
 133                         this.entry = entry;
 134                 }
 135
 136                 public ZipArchive Archive {
 137                         get;
 138                         private set;
 139                 }
 140
 141                 public long CompressedLength {
 142                         get {
 143                                 if (Archive.Mode == ZipArchiveMode.Create)
 144                                         throw new InvalidOperationException("Property cannot be retrieved when the mode is set to Create");
 145
 146                                 return entry.CompressedSize;
 147                         }
 148                 }
 149
 150                 public string FullName {
 151                         get { return entry.Key; }
 152                 }
 153
 154                 public DateTimeOffset LastWriteTime {
 155                         get { return entry.LastModifiedTime.GetValueOrDefault(); }
 156                         set { entry.LastModifiedTime = value.DateTime; }
 157                 }
 158
 159                 public long Length {
 160                         get {
 161                                 if (Archive.Mode == ZipArchiveMode.Create)
 162                                         throw new InvalidOperationException("Property cannot be retrieved when the mode is set to Create");
 163
 164                                 return entry.Size;
 165                         }
 166                 }
 167
 168                 public string Name {
 169                         get { return Path.GetFileName(entry.Key); }
 170                 }
 171
 172                 public void Delete()
 173                 {
 174                         if (Archive.disposed)
 175                                 throw new ObjectDisposedException("The zip archive for this entry has been disposed.");
 176
 177                         if (Archive.Mode !=     ZipArchiveMode.Update)
 178                                 throw new NotSupportedException("The zip archive for this entry was opened in a mode other than Update.");
 179
 180                         if (openStream != null)
 181                                 throw new IOException("The entry is already open for reading or writing.");
 182
 183                         wasDeleted = true;
 184                         Archive.zipFile.RemoveEntry(entry);
 185                 }
 186
 187                 public Stream Open()
 188                 {
 189                         if (Archive.disposed)
 190                                 throw new ObjectDisposedException("The zip archive for this entry has been disposed.");
 191
 192                         if (openStream != null && Archive.Mode == ZipArchiveMode.Update)
 193                                 throw new IOException("The entry is already currently open for writing.");
 194
 195                         if (wasDeleted)
 196                                 throw new IOException("The entry has been deleted from the archive.");
 197
 198                         if (Archive.Mode == ZipArchiveMode.Create && openStream != null)
 199                                 throw new IOException("The archive for this entry was opened with the Create mode, and this entry has already been written to.");
 200
 201                         openStream = new ZipArchiveEntryStream(this, entry.OpenEntryStream());
 202
 203                         return openStream;
 204                 }
 205         }
 206 }