[英]Neo4j node indexing: how to change Lucene default similarity?
I'm using Neo4j (1.9) and lucene core 3.5, through the support offered by the neo4j-lucene-index library. 我正在使用neo4j(1.9)和lucene core 3.5,通过neo4j-lucene-index库提供的支持。 In my code, I create a new node index like that:
在我的代码中,我创建了一个新的节点索引:
HashMap<String, String> stringMap = new HashMap<String, String>();
stringMap.put("type", "fulltext");
stringMap.put(IndexManager.PROVIDER, "lucene");
stringMap.put("to_lower_case", "false");
stringMap.put("similarity", MySimilarity.class.getName());
stringMap.put("analyzer", MyAnalyzer.class.getName());
simpleIndex = (LuceneIndex<Node>) template.getGraphDatabaseService()
.index().forNodes("simple-index", stringMap);
and query the node index by means of a multi-field query: 并通过多字段查询查询节点索引:
Analyzer analyzer = new MyAnalyzer();
Query query = null;
try {
query = MultiFieldQueryParser.parse(Version.LUCENE_35,
queriesArray, fieldsArray, flagsArray, analyzer);
} catch (ParseException e) {
e.printStackTrace();
return;
}
if (query == null)
return;
QueryContext qc = new QueryContext(query).sortByScore();
IndexHits<Node> hits = simpleIndex.query(qc);
How can I change the Similarity implementation, used for sorting by score, to MySimilarity class (which extends the DefaultSimilarity and overrides some of its methods)? 如何将用于按分数排序的相似性实现更改为MySimilarity类(扩展DefaultSimilarity并覆盖其某些方法)? The reported query always uses the DefaultSimilarity and I was not able to find any hook to set the similarity used by the searcher activated during my query.
报告的查询总是使用DefaultSimilarity,我无法找到任何钩子来设置查询期间激活的搜索器使用的相似性。
The fact that the supplied similarity isn't used during queries is a bug and should be fixed. 在查询期间未使用提供的相似性的事实是一个错误,应该修复。 Created https://github.com/neo4j/neo4j/issues/375 to track it.
创建https://github.com/neo4j/neo4j/issues/375来跟踪它。
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