Filters/FilterOle.cs

   1 //
   2 // FilterOle.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27
  28 using System;
  29 using System.Collections;
  30 using System.IO;
  31 using System.Text;
  32 using Gsf;
  33
  34 using Beagle.Daemon;
  35 using Beagle.Util;
  36
  37 namespace Beagle.Filters {
  38
  39         public abstract class FilterOle : Beagle.Daemon.Filter {
  40
  41                 public FilterOle ()
  42                 {
  43                 }
  44
  45                 protected virtual void ExtractMetaData (Gsf.Input sum_stream,
  46                                                         Gsf.Input doc_stream)
  47                 {
  48                 }
  49
  50                 protected virtual void OpenStorage (FileInfo info) {}
  51
  52                 protected Infile file;
  53                 protected DocMetaData sumMeta = null;
  54                 protected DocMetaData docSumMeta = null;
  55                 protected string FileName;
  56
  57                 override protected void DoOpen (FileInfo info)
  58                 {
  59                         try {
  60                                 Gsf.Global.Init ();
  61                                 Input input = new InputStdio (info.FullName);
  62                                 if (input != null) {
  63                                         input = input.Uncompress();
  64                                         file = new InfileMSOle (input);
  65                                 }
  66                                 if (input == null || file == null) {
  67                                         Logger.Log.Error ("Unable to open [{0}] ",info.FullName);
  68                                         Console.WriteLine ("input/file is null");
  69                                         Error ();
  70                                         return;
  71                                 }
  72
  73                                 OpenStorage (info);
  74                         } catch (Exception e) {
  75                                 Logger.Log.Error ("Unable to open "+info.FullName);
  76                                 Console.WriteLine ("{0}", e.Message);
  77                                 Error ();
  78                                 return;
  79                         }
  80                 }
  81
  82                 void PullMetaData (Gsf.Input sum_stream, Gsf.Input doc_stream)
  83                 {
  84
  85                         DocProp prop = null;
  86                         string str = null;
  87
  88                         sumMeta = new DocMetaData ();
  89                         if (sum_stream != null)
  90                                 Msole.MetadataRead (sum_stream, sumMeta);
  91                         else
  92                                 Logger.Log.Warn ("SummaryInformationStream not found in {0}", FileName);
  93
  94                         docSumMeta = new DocMetaData ();
  95                         if (doc_stream != null)
  96                                 Msole.MetadataRead (doc_stream, docSumMeta);
  97                         else
  98                                 Logger.Log.Warn ("DocumentSummaryInformationStream not found in {0}", FileName);
  99
 100                         if (sumMeta != null) {
 101                                 prop = sumMeta.Lookup ("dc:title");
 102                                 if (prop != null)
 103                                         str = prop.Val as string;
 104                                 if (str != null && str.Length > 0)
 105                                         AddProperty (Beagle.Property.New ("dc:title", str));
 106
 107                                 str = null;
 108                                 prop = sumMeta.Lookup ("dc:subject");
 109                                 if (prop != null)
 110                                         str = prop.Val as string;
 111                                 if (str != null && str.Length > 0)
 112                                         AddProperty (Beagle.Property.New ("dc:subject", str));
 113
 114                                 str = null;
 115                                 prop = sumMeta.Lookup ("dc:description");
 116                                 if (prop != null)
 117                                         str = prop.Val as string;
 118                                 if (str != null && str.Length > 0)
 119                                         AddProperty (Beagle.Property.New ("dc:description", str));
 120
 121                                 str = null;
 122                                 prop = sumMeta.Lookup ("gsf:keywords");
 123                                 if (prop != null)
 124                                         str = prop.Val as string;
 125                                 if (str != null && str.Length > 0)
 126                                         AddProperty (Beagle.Property.New ("fixme:keywords", str));
 127
 128                                 str = null;
 129                                 prop = sumMeta.Lookup ("gsf:creator");
 130                                 if (prop != null)
 131                                         str = prop.Val as string;
 132                                 if (str != null && str.Length > 0)
 133                                         AddProperty (Beagle.Property.New ("fixme:author", str));
 134
 135                                 str = null;
 136                                 prop = sumMeta.Lookup ("gsf:last-saved-by");
 137                                 if (prop != null)
 138                                         str = prop.Val as string;
 139                                 if (str != null && str.Length > 0)
 140                                         AddProperty (Beagle.Property.New ("fixme:last-saved-by", str));
 141
 142                                 str = null;
 143                                 prop = sumMeta.Lookup ("gsf:generator");
 144                                 if (prop != null)
 145                                         str = prop.Val as string;
 146                                 if (str != null && str.Length > 0)
 147                                         AddProperty (Beagle.Property.New ("fixme:generator", str));
 148
 149                                 str = null;
 150                                 prop = sumMeta.Lookup ("gsf:template");
 151                                 if (prop != null)
 152                                         str = prop.Val as string;
 153                                 if (str != null && str.Length > 0)
 154                                         AddProperty (Beagle.Property.New ("fixme:template", str));
 155                         }
 156
 157                         if (docSumMeta != null) {
 158                                 str = null;
 159                                 prop = docSumMeta.Lookup ("gsf:company");
 160                                 if (prop != null)
 161                                         str = prop.Val as string;
 162                                 if (str != null && str.Length > 0)
 163                                         AddProperty (Beagle.Property.New ("fixme:company", str));
 164
 165                                 str = null;
 166                                 prop = docSumMeta.Lookup ("gsf:category");
 167                                 if (prop != null)
 168                                         str = prop.Val as string;
 169                                 if (str != null && str.Length > 0)
 170                                         AddProperty (Beagle.Property.New ("fixme:category", str));
 171
 172                         }
 173
 174                         ExtractMetaData (sum_stream, doc_stream);
 175                 }
 176
 177                 override protected void DoPullProperties ()
 178                 {
 179                         Input sum_stream = null;
 180                         Input doc_stream = null;
 181                         string str = null;
 182                         int childCount = 0;
 183                         int found = 0;
 184
 185                         if (file == null) {
 186                                 Finished ();
 187                                 return;
 188                         }
 189
 190                         try {
 191                                 sum_stream = file.ChildByName ("\u0005SummaryInformation");
 192                                 doc_stream = file.ChildByName ("\u0005DocumentSummaryInformation");
 193
 194                                 PullMetaData (sum_stream, doc_stream);
 195                         } catch (Exception e) {
 196                                 Logger.Log.Error ("Exception occurred duing DoPullProperties.");
 197                                 Logger.Log.Error (e);
 198                                 Error ();
 199                         }
 200                 }
 201
 202                 /*
 203                   FIXME: Uncomment this when Shutdown() is
 204                   available in gsf#.
 205                 override protected void DoClose ()
 206                 {
 207                         Gsf.Global.Shutdown ();
 208                 }
 209                 */
 210
 211                 // FIXME: These are utility functions and can be useful
 212                 // outside this filter as well.
 213                 public static int GetInt32 (byte [] data, int offset) {
 214                         return data[offset] + (data[offset + 1] << 8) + (data[offset + 2] << 16) + (data[offset + 3] << 24);
 215                 }
 216                 public static int GetInt16 (byte [] data, int offset) {
 217                         return data[offset] + (data[offset + 1] << 8);
 218                 }
 219
 220         }
 221 }