protected void BeforeUpdateOrEditAsync(TArticle t)
{
var a = new SmartChineseAnalyzer(LuceneVersion.LUCENE_48);
using var ts = a.GetTokenStream("tokens", new StringReader(t.SearchAbleString));
var att = ts.GetAttribute <ICharTermAttribute>();
var tokens = new List <string>();
ts.Reset();
while (ts.IncrementToken())
{
tokens.Add(att.ToString());
}
t.Tokens = tokens;
}
/// <inheritdoc/>
public virtual void BeforeAddAndUpdate(T t)
{
var a = new SmartChineseAnalyzer(LuceneVersion.LUCENE_48);
using var ts = a.GetTokenStream("tokens", new StringReader(t.SearchAbleString ?? ""));
var att = ts.GetAttribute <ICharTermAttribute>();
var tokens = new List <string>();
ts.Reset();
while (ts.IncrementToken())
{
tokens.Add(att.ToString());
}
t.Tokens = tokens;
}
public static void ClearLuceneIndexRecord(string record_id)
{
// init lucene
var analyzer = new SmartChineseAnalyzer(AppLuceneVersion); //new StandardAnalyzer(Version.LUCENE_30);
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
using (var writer = new IndexWriter(_directory, indexConfig))
{
// remove older index entry
var searchQuery = new TermQuery(new Term("Id", record_id));
writer.DeleteDocuments(searchQuery);
// close handles
analyzer.Dispose();
writer.Dispose();
}
}
public static void AddUpdateLuceneIndex(IEnumerable <SearchData> sampleDatas)
{
// init lucene
var analyzer = new SmartChineseAnalyzer(AppLuceneVersion); //new StandardAnalyzer(Version.LUCENE_30);
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
using (var writer = new IndexWriter(_directory, indexConfig))
{
// add data to lucene search index (replaces older entries if any)
foreach (var sampleData in sampleDatas)
{
_addToLuceneIndex(sampleData, writer);
}
// close handles
analyzer.Dispose();
writer.Dispose();
}
}
public static bool ClearLuceneIndex()
{
try
{
var analyzer = new SmartChineseAnalyzer(AppLuceneVersion); //new StandardAnalyzer(Version.LUCENE_30);
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
using (var writer = new IndexWriter(_directory, indexConfig))
{
// remove older index entries
writer.DeleteAll();
// close handles
analyzer.Dispose();
writer.Dispose();
}
}
catch (Exception)
{
return(false);
}
return(true);
}
private static IEnumerable <SearchData> _search(int pageIndex, int pageSize, out int totalCount, string keyword)
{
var hits_limit = 1000;
//create an analyzer to process the text
var analyzer = new SmartChineseAnalyzer(AppLuceneVersion);
//create an index writer
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
var writer = new IndexWriter(_directory, indexConfig);
var searcher = new IndexSearcher(writer.GetReader(applyAllDeletes: true));
var parser = new MultiFieldQueryParser
(AppLuceneVersion, new[] { "Id", "Name", "Description" }, analyzer);
var query = parseQuery(keyword, parser);
var hits = searcher.Search(query, null, hits_limit, Sort.RELEVANCE).ScoreDocs;
var results = _mapLuceneToDataList(pageIndex, pageSize, hits, searcher);
totalCount = hits.Length;
analyzer.Dispose();
return(results);
}