class/WindowsBase/System.IO.Packaging/PackageProperties.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //  Chris Toshok (toshok@ximian.com)
  24 //  Alan McGovern (amcgovern@novell.com)
  25 //
  26
  27 using System;
  28 using System.Xml;
  29
  30 namespace System.IO.Packaging {
  31
  32         public abstract class PackageProperties : IDisposable
  33         {
  34                 internal const string NSPackageProperties = "http://schemas.openxmlformats.org/package/2006/metadata/core-properties";
  35                 internal const string NSPackagePropertiesRelation = "http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties";
  36                 internal const string PackagePropertiesContentType = "application/vnd.openxmlformats-package.core-properties+xml";
  37
  38
  39                 static int uuid;
  40
  41                 protected PackageProperties ()
  42                 {
  43
  44                 }
  45
  46                 public abstract string Category { get; set; }
  47                 public abstract string ContentStatus { get; set; }
  48                 public abstract string ContentType { get; set; }
  49                 public abstract DateTime? Created { get; set; }
  50                 public abstract string Creator { get; set; }
  51                 public abstract string Description { get; set; }
  52                 public abstract string Identifier { get; set; }
  53                 public abstract string Keywords { get; set; }
  54                 public abstract string Language { get; set; }
  55                 public abstract string LastModifiedBy { get; set; }
  56                 public abstract DateTime? LastPrinted { get; set; }
  57                 public abstract DateTime? Modified { get; set; }
  58                 internal Package Package { get; set; }
  59                 internal PackagePart Part { get; set; }
  60                 public abstract string Revision { get; set; }
  61                 public abstract string Subject { get; set; }
  62                 public abstract string Title { get; set; }
  63                 public abstract string Version { get; set; }
  64
  65
  66                 public void Dispose ()
  67                 {
  68                         Dispose (true);
  69                 }
  70
  71                 protected virtual void Dispose (bool disposing)
  72                 {
  73                         // Nothing
  74                 }
  75
  76                 internal void Flush ()
  77                 {
  78                         using (MemoryStream temp = new MemoryStream ()) {
  79                                 using (XmlTextWriter writer = new XmlTextWriter (temp, System.Text.Encoding.UTF8)) {
  80                                         WriteTo (writer);
  81                                         writer.Flush ();
  82                                         if (temp.Length == 0)
  83                                                 return;
  84                                 }
  85                         }
  86
  87                         if (Part == null)
  88                         {
  89                                 int id = System.Threading.Interlocked.Increment (ref uuid);
  90                                 Uri uri = new Uri (string.Format ("/package/services/metadata/core-properties/{0}.psmdcp", id), UriKind.Relative);
  91                                 Part = Package.CreatePart (uri, PackagePropertiesContentType);
  92                                 PackageRelationship rel = Package.CreateRelationship (uri, TargetMode.Internal, NSPackagePropertiesRelation);
  93                         }
  94
  95                         using (Stream s = Part.GetStream (FileMode.Create))
  96                                 using (XmlTextWriter writer = new XmlTextWriter (s, System.Text.Encoding.UTF8))
  97                                         WriteTo (writer);
  98                 }
  99
 100                 internal virtual void LoadFrom (Stream stream)
 101                 {
 102
 103                 }
 104
 105                 internal virtual void WriteTo (XmlTextWriter writer)
 106                 {
 107
 108                 }
 109         }
 110 }