Question

我正在尝试在Lucene.net 4.8中创建一个自定义分析器 - 但是我遇到了一个我无法理解的错误。

我的分析器代码：

public class SynonymAnalyzer : Analyzer  
{

protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
{
    String base1 = "lawnmower";
    String syn1 = "lawn mower";
    String base2 = "spanner";
    String syn2 = "wrench";

    SynonymMap.Builder sb = new SynonymMap.Builder(true);
    sb.Add(new CharsRef(base1), new CharsRef(syn1), true);
    sb.Add(new CharsRef(base2), new CharsRef(syn2), true);
    SynonymMap smap = sb.Build();

    Tokenizer tokenizer = new StandardTokenizer(Version.LUCENE_48, reader);

    TokenStream result = new StandardTokenizer(Version.LUCENE_48, reader);
    result = new SynonymFilter(result, smap, true);
    return new TokenStreamComponents(tokenizer, result);
}
}

构建索引的代码是：

var fordFiesta = new Document();
fordFiesta.Add(new StringField("Id", "1", Field.Store.YES));
fordFiesta.Add(new TextField("Make", "Ford", Field.Store.YES));
fordFiesta.Add(new TextField("Model", "Fiesta 1.0 Developing", Field.Store.YES));
fordFiesta.Add(new TextField("FullText", "lawnmower Ford 1.0 Fiesta Developing spanner", Field.Store.YES));

Lucene.Net.Store.Directory directory = FSDirectory.Open(new DirectoryInfo(Environment.CurrentDirectory + "\\LuceneIndex"));

SynonymAnalyzer analyzer = new SynonymAnalyzer();

var config = new IndexWriterConfig(Version.LUCENE_48, analyzer);
var writer = new IndexWriter(directory, config);

writer.UpdateDocument(new Term("Id", "1"), fordFiesta);

writer.Flush(true, true);
writer.Commit();
writer.Dispose();

然而，当我运行我的代码时，它在writer.UpdateDocument行失败并出现以下错误：

TokenStream合同违规：Reset（）/ Dispose（）调用缺失，Reset（）多次调用，或者子类不调用base.Reset（）。有关正确的使用工作流程的更多信息，请参阅TokenStream类的Javadocs。

我无法弄清楚我哪里出错了？！

Answer 1

问题是你的TokenStreamComponents是使用与结果TokenStream中使用的Tokenizer不同的Tokenizer构造的。将其更改为此应解决问题：

Tokenizer tokenizer = new StandardTokenizer(Version.LUCENE_48, reader);
TokenStream result = new SynonymFilter(tokenizer, smap, true);
return new TokenStreamComponents(tokenizer, result);

创建Lucene.net自定义分析器

1 个答案: