Lucene查询的函数调用关系

最新推荐文章于 2021-03-06 20:22:19 发布

原创最新推荐文章于 2021-03-06 20:22:19 发布 · 624 阅读

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#lucene #string #query

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本文详细解析了Lucene中短语查询的工作原理和技术细节，包括权重计算、相似度评分、索引搜索过程及结果排序等关键步骤。通过跟踪源码流程，帮助读者深入理解Lucene如何高效地进行短语匹配。

IndexSearcher.search
	IndexSearcher.createNormalizedWeight(Query)
		PhraseQuery.createWeight
			new PhraseWeight
				IndexSearcher.getSimilarity()
				DefaultSimilarity.idfExplain
		Weight.normalize
	IndexSearcher.search(Weight)
		TopScoreDocCollector.setNextReader
		PhraseWeight.scorer
			ReadOnlySegmentReader.termPositions
				SegmentTermPositions.seek(Term)
					TermInfosReader.get(Term)
					SegmentTermPositions.seek(TermInfo ti, Term term)
						FieldInfos.fieldInfo(String fieldName)
			new PostingsAndFreq
			ArrayUtil.mergeSort(PostingsAndFreq)
			new ExactPhraseScorer
		ExactPhraseScorer.score(Collector)
			ExactPhraseScorer.nextDoc
			TopScoreDocCollector.collect(doc)
				ExactPhraseScorer.score()
	TopScoreDocCollector.topDocs