Lucene Guruh: 416-18 Bajardi: Abduraxmonov m tekshirdi: Djurayev o toshkent-2021

public List searchIndex(String inField, String queryString) {

Query query = new QueryParser(inField, analyzer)

.parse(queryString);

IndexReader indexReader = DirectoryReader.open(memoryIndex);

IndexSearcher searcher = new IndexSearcher(indexReader);

TopDocs topDocs = searcher.search(query, 10);

List documents = new ArrayList<>();

for (ScoreDoc scoreDoc : topDocs.scoreDocs) { documents.add(searcher.doc(scoreDoc.doc)); }

return documents; }

Search() usulida ikkinchi tamsayı argumenti qancha eng yaxshi qidiruv natijalarini qaytarish kerakligini ko'rsatadi.

Endi buni sinab ko'ramiz:

@Test

public void givenSearchQueryWhenFetchedDocumentThenCorrect() { InMemoryLuceneIndex inMemoryLuceneIndex

= new InMemoryLuceneIndex(new RAMDirectory(), new StandardAnalyzer()); inMemoryLuceneIndex.indexDocument("Hello world", "Some hello world");

List documents =

inMemoryLuceneIndex.searchIndex("body", "world");

assertEquals(

"Hello world",

documents.get(0).get("title"));

}

Bu erda biz indeksga oddiy hujjatni qo'shamiz, ikkita maydon "sarlavha" va "tana" va keyin qidiruv so'rovi yordamida xuddi shunday qidirishga harakat qilamiz.

6. Lucene so'rovlari

Endi biz indekslash va qidirish asoslari bilan qulay bo'lganimiz uchun, keling, biroz chuqurroq qazib olaylik.Oldingi bo'limlarda biz so'rovlarning asosiy sintaksisini va uni QueryParser yordamida qanday qilib so'rov namunasiga aylantirishni ko'rib chiqdik.

Lucene, shuningdek, turli xil aniq dasturlarni taqdim etadi:


6.1. TermQuery Term - qidiruv uchun asosiy birlik bo'lib, izlanadigan matn bilan birga maydon nomini o'z ichiga oladi. TermQuery bitta atamadan iborat barcha so'rovlarning eng oddiyidir:

@Test