有谁知道如何使用带有 Lucene 3.6 的 Wordnet 扩展查

问题描述

我在 org.apache.lucene.analysis.synonym 中找到了 WordnetSynonymParser 类，但在 API 和 google 中都没有使用示例.有谁有这方面的经验吗?

I've found the class WordnetSynonymParser in org.apache.lucene.analysis.synonym but there aren't examples of its usage neither in the API nor in google. Does any one have experience with it?

谢谢！

编辑:我知道以前有类 SynExpand，但是在 3.6 版本中它消失了...

EDIT: I know that there used to be the class SynExpand, but with version 3.6 it disappeared...

我试试:

           try {
                   FileReader rulesReader = new FileReader("wn/wn_s.pl");
               SynonymMap.Builder parser = null;
               parser = new WordnetSynonymParser(true, true, analyzer);
               ((WordnetSynonymParser)parser).add(rulesReader);          
               synonymMap = parser.build();
            } catch (Exception e) {
                            e.printStackTrace();
                            System.exit(1);
            }

但我收到以下错误:

java.text.ParseException: Invalid synonym rule at line 109
        at org.apache.lucene.analysis.synonym.WordnetSynonymParser.add(WordnetSynonymParser.java:75)
        at pirServer.QueryClassifier.<init>(QueryClassifier.java:77)
        at pirServer.PIRServer.main(PIRServer.java:32)
Caused by: java.lang.IllegalArgumentException: term: course of action analyzed to a token with posinc != 1
        at org.apache.lucene.analysis.synonym.SynonymMap$Builder.analyze(SynonymMap.java:131)
        at org.apache.lucene.analysis.synonym.WordnetSynonymParser.parseSynonym(WordnetSynonymParser.java:92)
        at org.apache.lucene.analysis.synonym.WordnetSynonymParser.add(WordnetSynonymParser.java:67)
        ... 2 more 

推荐答案

我正在做类似的事情，只是阅读了文档 - 所以 SynonymFilter 文档中的相关警告非常新鲜:

I am working on a similar thing and just read the documentation - so a relevant caution from the SynonymFilter doc is very fresh:

""此令牌流无法正确处理位置增量！= 1，即您应该在过滤掉停用词之前放置此过滤器""

""This token stream cannot properly handle position increments != 1, ie, you should place this filter before filtering out stop words""

http://lucene.apache.org/core/3_6_0/api/all/org/apache/lucene/analysis/synonym/SynonymFilter.html

您传递给 WordNetSynonymParser 的分析器(您没有在帖子中描述)可能会删除停用词(大多数情况下都是如此)，从而导致:

It's possible that the analyzer you're passing (which you fail to describe in your post) to the WordNetSynonymParser does remove stop words (as is the case for most of them) causing:

java.lang.IllegalArgumentException: term: 使用 posinc != 1 分析到令牌的操作过程

java.lang.IllegalArgumentException: term: course of action analyzed to a token with posinc != 1

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