Package org.apache.lucene.index

Examples of org.apache.lucene.index.RandomIndexWriter.deleteDocuments()

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    for(int i=0; i < termsToDel.size() ; i++) {
      delTerms[i] = new Term(FIELD_NAME, termsToDel.get(i));
    }
   
    for(Term delTerm: delTerms) {
      writer.deleteDocuments(delTerm); 
    }
    writer.commit();
    writer.close();
   
    for(String termToDel: termsToDel) {
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    // make sure we get a cache hit when we reopen reader
    // that had no change to deletions

    // fake delete (deletes nothing):
    writer.deleteDocuments(new Term("foo", "bar"));

    IndexReader oldReader = reader;
    reader = refreshReader(reader);
    assertTrue(reader == oldReader);
    int missCount = filter.missCount;
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    // cache hit:
    assertEquals(missCount, filter.missCount);

    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));

    // NOTE: important to hold ref here so GC doesn't clear
    // the cache entry!  Else the assert below may sometimes
    // fail:
    oldReader = reader;
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    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 2, docs.totalHits);
    assertEquals(missCount, filter.missCount);

    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));

    reader = refreshReader(reader);
    searcher = newSearcher(reader, false);

    docs = searcher.search(new MatchAllDocsQuery(), filter, 1);
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    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);

    // now delete the doc, refresh the reader, and see that it's not there
    _TestUtil.keepFullyDeletedSegments(writer.w);
    writer.deleteDocuments(new Term("id", "1"));

    reader = refreshReader(reader);
    searcher.close();
    searcher = newSearcher(reader, false);
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    IndexReader oldReader = reader;

    // make sure we get a cache hit when we reopen reader
    // that had no change to deletions
    // Deletes nothing:
    writer.deleteDocuments(new Term("foo", "bar"));
    reader = refreshReader(reader);
    assertTrue(reader == oldReader);
    int missCount = filter.missCount;
    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
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    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
    assertEquals(missCount, filter.missCount);

    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));

    reader = refreshReader(reader);
    searcher.close();
    searcher = newSearcher(reader, false);
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    constantScore = new ConstantScoreQuery(filter);
    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);

    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));

    reader = refreshReader(reader);
    searcher.close();
    searcher = newSearcher(reader, false);
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    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);

    // now delete the doc, refresh the reader, and see that
    // it's not there
    _TestUtil.keepFullyDeletedSegments(writer.w);
    writer.deleteDocuments(new Term("id", "1"));

    reader = refreshReader(reader);
    searcher.close();
    searcher = newSearcher(reader, false);
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    IndexReader oldReader = reader;

    // make sure we get a cache hit when we reopen readers
    // that had no new deletions
    // Deletes nothing:
    writer.deleteDocuments(new Term("foo", "bar"));
    reader = refreshReader(reader);
    assertTrue(reader == oldReader);
    int missCount = filter.missCount;
    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
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