IndexFiles.cs :  » Search-Engines » dotLucene » Lucene » Net » Demo » C# / CSharp Open Source

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C# / CSharp Open Source » Search Engines » dotLucene 
dotLucene » Lucene » Net » Demo » IndexFiles.cs
/* 
 * Copyright 2004 The Apache Software Foundation
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System;
using StandardAnalyzerLucene.Net.Analysis.Standard.StandardAnalyzer;
using IndexWriterLucene.Net.Index.IndexWriter;

namespace Lucene.Net.Demo{
  
  class IndexFiles
  {
    
    internal static readonly System.IO.FileInfo INDEX_DIR = new System.IO.FileInfo("index");
    
    [STAThread]
    public static void  Main(System.String[] args)
    {
      System.String usage = typeof(IndexFiles) + " <root_directory>";
      if (args.Length == 0)
      {
        System.Console.Error.WriteLine("Usage: " + usage);
        System.Environment.Exit(1);
      }
      
      bool tmpBool;
      if (System.IO.File.Exists(INDEX_DIR.FullName))
        tmpBool = true;
      else
        tmpBool = System.IO.Directory.Exists(INDEX_DIR.FullName);
      if (tmpBool)
      {
        System.Console.Out.WriteLine("Cannot save index to '" + INDEX_DIR + "' directory, please delete it first");
        System.Environment.Exit(1);
      }
      
      System.IO.FileInfo docDir = new System.IO.FileInfo(args[0]);
      bool tmpBool2;
      if (System.IO.File.Exists(docDir.FullName))
        tmpBool2 = true;
      else
        tmpBool2 = System.IO.Directory.Exists(docDir.FullName);
      if (!tmpBool2) // || !docDir.canRead()) // {{Aroush}} what is canRead() in C#?
      {
        System.Console.Out.WriteLine("Document directory '" + docDir.FullName + "' does not exist or is not readable, please check the path");
        System.Environment.Exit(1);
      }
      
      System.DateTime start = System.DateTime.Now;
      try
      {
        IndexWriter writer = new IndexWriter(INDEX_DIR, new StandardAnalyzer(), true);
        System.Console.Out.WriteLine("Indexing to directory '" + INDEX_DIR + "'...");
        IndexDocs(writer, docDir);
        System.Console.Out.WriteLine("Optimizing...");
        writer.Optimize();
        writer.Close();
        
        System.DateTime end = System.DateTime.Now;
        System.Console.Out.WriteLine(end.Ticks - start.Ticks + " total milliseconds");
      }
      catch (System.IO.IOException e)
      {
        System.Console.Out.WriteLine(" caught a " + e.GetType() + "\n with message: " + e.Message);
      }
    }
    
    public static void  IndexDocs(IndexWriter writer, System.IO.FileInfo file)
    {
      // do not try to index files that cannot be read
      // if (file.canRead())  // {{Aroush}} what is canRead() in C#?
      {
        if (System.IO.Directory.Exists(file.FullName))
        {
          System.String[] files = System.IO.Directory.GetFileSystemEntries(file.FullName);
          // an IO error could occur
          if (files != null)
          {
            for (int i = 0; i < files.Length; i++)
            {
              IndexDocs(writer, new System.IO.FileInfo(files[i]));
            }
          }
        }
        else
        {
          System.Console.Out.WriteLine("adding " + file);
          try
          {
            writer.AddDocument(FileDocument.Document(file));
          }
          // at least on windows, some temporary files raise this exception with an "access denied" message
          // checking if the file can be read doesn't help
          catch (System.IO.FileNotFoundException fnfe)
          {
            ;
          }
        }
      }
    }
  }
}
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