/// <summary>
/// Maintains an up-to-date index of content of specified files and directories
/// </summary>
public IndexFacade(
Watcher watcher,
Mirror mirror,
IndexingTaskProcessor indexingTaskProcessor,
IIndexEngine indexEngine)
{
_watcher = watcher;
_mirror = mirror;
_indexingTaskProcessor = indexingTaskProcessor;
_indexEngine = indexEngine;
_mirror.FileCreated += fileCreatead;
_mirror.FileDeleted += fileDeleted;
_mirror.FileMoved += fileMoved;
_mirror.EntryAccessError += fileAccessError;
_indexingTaskProcessor.FileAccessError += fileAccessError;
}
/// <summary>
/// Maintains an up-to-date index of content of specified files and directories
/// </summary>
/// <param name="fileNameFilter">A filtering callback to determine wich files need to be indexed.
/// By default all files are indexed.</param>
/// <param name="additionalWordChars">Additional non-word-separator characters for <see cref="ILexer"/></param>
/// <param name="maxWordLength">Maximum word length to be returned by <see cref="ILexer"/></param>
/// <param name="caseSensitive">Whether index search is case sensitive</param>
/// <param name="indexDirectory">A directory to store index files</param>
/// <param name="maxFileLength">Maximum length of indexed file</param>
/// <param name="maxReadAttempts">Maximum read attempts when file system denies access to the file</param>
/// <param name="lexerFactory">Creates instances of <see cref="ILexer"/> to parse text into a
/// sequence of <see cref="IToken"/></param>
/// <param name="encodingDetector">Provides encoding detection functionality. By default
/// <see cref="Encoding.UTF8"/>is assumed.</param>
public static IndexFacade Create(
Mirror.FileNameFilter fileNameFilter = null,
IEnumerable <char> additionalWordChars = null,
int?maxWordLength = null,
bool?caseSensitive = null,
string indexDirectory = null,
long?maxFileLength = null,
int?maxReadAttempts = null,
ILexerFactory lexerFactory = null,
Func <FileInfo, Encoding> encodingDetector = null)
{
if (additionalWordChars != null && lexerFactory != null)
{
throw new ArgumentException($"setting both {nameof(additionalWordChars)} and {nameof(lexerFactory)} is not supported");
}
if (maxWordLength.HasValue && lexerFactory != null)
{
throw new ArgumentException($"setting both {nameof(maxWordLength)} and {nameof(lexerFactory)} is not supported");
}
if (caseSensitive.HasValue && lexerFactory != null)
{
throw new ArgumentException($"setting both {nameof(caseSensitive)} and {nameof(lexerFactory)} is not supported");
}
DefaultLexerFactory defaultLexerFactory = null;
if (additionalWordChars != null || maxWordLength.HasValue || caseSensitive.HasValue)
{
defaultLexerFactory = new DefaultLexerFactory();
lexerFactory = defaultLexerFactory;
}
if (additionalWordChars != null)
{
defaultLexerFactory.AdditionalWordChars.UnionWith(additionalWordChars);
}
if (maxWordLength.HasValue)
{
defaultLexerFactory.MaxWordLength = maxWordLength.Value;
}
if (caseSensitive.HasValue)
{
defaultLexerFactory.IsPreservingCase = caseSensitive.Value;
}
var indexEngine = new LuceneIndexEngine(indexDirectory, lexerFactory);
var watcher = new Watcher();
var mirror = new Mirror(watcher, new SequentialId(), fileNameFilter);
var taskProcessor = new IndexingTaskProcessor(indexEngine, encodingDetector);
if (maxFileLength.HasValue)
{
taskProcessor.MaxFileLength = maxFileLength.Value;
}
if (maxReadAttempts.HasValue)
{
taskProcessor.MaxReadAttempts = maxReadAttempts.Value;
}
return(new IndexFacade(watcher, mirror, taskProcessor, indexEngine));
}
