xapian-bindings/csharp/docs/examples/SimpleIndex.cs

   1 // Index each paragraph of a text file as a Xapian document.
   2 //
   3 // Copyright (c) 2003 James Aylett
   4 // Copyright (c) 2004,2006,2007 Olly Betts
   5 //
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License as
   8 // published by the Free Software Foundation; either version 2 of the
   9 // License, or (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  19 // USA
  20
  21 using System;
  22
  23 class SimpleIndex {
  24     public static void Main(string[] argv) {
  25         if (argv.Length != 1) {
  26             Console.Error.WriteLine("Usage: SimpleIndex PATH_TO_DATABASE");
  27             Environment.Exit(1);
  28         }
  29
  30         try {
  31             // Open the database for update, creating a new database if
  32             // necessary.
  33             Xapian.WritableDatabase database;
  34             database = new Xapian.WritableDatabase(argv[0], Xapian.Xapian.DB_CREATE_OR_OPEN);
  35
  36             Xapian.TermGenerator indexer = new Xapian.TermGenerator();
  37             Xapian.Stem stemmer = new Xapian.Stem("english");
  38             indexer.SetStemmer(stemmer);
  39
  40             string para = "";
  41             while (true) {
  42                 string line = Console.In.ReadLine();
  43                 if (line == null) {
  44                     if (para == "") break;
  45                     line = "";
  46                 }
  47                 line = line.Trim();
  48                 if (line == "") {
  49                     if (para != "") {
  50                         // We've reached the end of a paragraph, so index it.
  51                         Xapian.Document doc = new Xapian.Document();
  52                         doc.SetData(para);
  53
  54                         indexer.SetDocument(doc);
  55                         indexer.IndexText(para);
  56
  57                         // Add the document to the database.
  58                         database.AddDocument(doc);
  59                         para = "";
  60                     }
  61                 } else {
  62                     if (para != "") para += " ";
  63                     para += line;
  64                 }
  65             }
  66         } catch (Exception e) {
  67             Console.Error.WriteLine("Exception: " + e.ToString());
  68             Environment.Exit(1);
  69         }
  70     }
  71 }