internal static void InitialiseBlankIndex(Directory directory)
{
new IndexWriter(directory,
GetAnalyzer(),
true,
IndexWriter.MaxFieldLength.UNLIMITED).Dispose();
}
internal static global::Lucene.Net.Index.IndexReader CreateLuceneReader(Directory directory, bool secondAttempt = false)
{
try
{
// Scan the index directory for segments files to check for corruption
var files = directory.ListAll();
var foundSegments = false;
foreach (var file in files)
{
if (file.StartsWith("segments", StringComparison.InvariantCultureIgnoreCase))
{
foundSegments = true;
break;
}
}
if (!foundSegments)
{
foreach (var file in files)
{
directory.DeleteFile(file);
}
}
var reader = global::Lucene.Net.Index.IndexReader.Open(directory, true);
return(reader);
}
catch (FileNotFoundException fnf)
{
InitialiseBlankIndex(directory);
if (!secondAttempt)
{
return(CreateLuceneReader(directory, true));
}
throw new InvalidOperationException("Could not create an index reader - tried twice", fnf);
}
catch (Exception ex)
{
throw new InvalidOperationException("Could not create an index reader", ex);
}
}
internal static IndexWriter CreateLuceneWriter(StandardAnalyzer standardAnalyzer, Directory directory)
{
return(new IndexWriter(directory,
standardAnalyzer,
false,
IndexWriter.MaxFieldLength.UNLIMITED));
}
internal static global::Lucene.Net.Index.IndexReader CreateLuceneReader(Directory directory, bool secondAttempt = false)
{
try
{
// Scan the index directory for segments files to check for corruption
var files = directory.ListAll();
var foundSegments = false;
foreach (var file in files)
{
if (file.StartsWith("segments", StringComparison.InvariantCultureIgnoreCase))
{
foundSegments = true;
break;
}
}
if (!foundSegments)
{
foreach (var file in files)
{
directory.DeleteFile(file);
}
}
var reader = global::Lucene.Net.Index.IndexReader.Open(directory, true);
return reader;
}
catch (FileNotFoundException fnf)
{
InitialiseBlankIndex(directory);
if (!secondAttempt) return CreateLuceneReader(directory, true);
throw new InvalidOperationException("Could not create an index reader - tried twice", fnf);
}
catch(Exception ex)
{
throw new InvalidOperationException("Could not create an index reader", ex);
}
}
internal static IndexWriter CreateLuceneWriter(StandardAnalyzer standardAnalyzer, Directory directory)
{
return new IndexWriter(directory,
standardAnalyzer,
false,
IndexWriter.MaxFieldLength.UNLIMITED);
}
internal static void InitialiseBlankIndex(Directory directory)
{
new IndexWriter(directory,
GetAnalyzer(),
true,
IndexWriter.MaxFieldLength.UNLIMITED).Dispose();
}
