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From Паша Минченков <char...@gmail.com>
Subject PerParentLimitedQuery and index updating
Date Mon, 31 May 2010 14:57:54 GMT
Hi,
It seems that PerParentLimitedQuery analyzes the old data before
update. Here's an example. If remove documents updates - everything
works. Thanks.

public void testPerParent()
		throws IOException {

	dir = new RAMDirectory();
	Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_29);
	IndexWriter writer = new IndexWriter(dir, analyzer, MaxFieldLength.UNLIMITED);

	addDocument(writer, "1", "A", "one", "parent");
	addDocument(writer, "2", "A", "two", "child");
	addDocument(writer, "3", "A", "three", "child");
	addDocument(writer, "4", "B", "four", "parent");
	addDocument(writer, "5", "B", "five", "child");
	addDocument(writer, "6", "B", "two", "child");
	addDocument(writer, "7", "B", "two", "child");
	addDocument(writer, "8", "B", "two", "child");


	writer.close();


	writer = new IndexWriter(dir, analyzer, MaxFieldLength.UNLIMITED);

	searcher = new IndexSearcher(dir);

	// if i comment update block (no data updates, it just updates index)
-- test is passed
	updateDocument(writer, "1", "A", "one", "parent");
	updateDocument(writer, "2", "A", "two", "child");
	updateDocument(writer, "3", "A", "three", "child");
	updateDocument(writer, "4", "B", "four", "parent");
	updateDocument(writer, "5", "B", "five", "child");
	updateDocument(writer, "6", "B", "two", "child");
	updateDocument(writer, "7", "B", "two", "child");
	updateDocument(writer, "8", "B", "two", "child");

	// if i dno't comment update block, i recive exception:
	// java.lang.IllegalArgumentException:
org.apache.lucene.search.PerParentLimitedQuery$PerParentLimitedScorer
	// Parent filter produced a bitset with no parent doc for child doc #1

	// It seems that PerParentLimitedQuery analyzes old data too.

	writer.commit();
	writer.close();

	searcher = new IndexSearcher(dir);
	TopDocs topResults = searcher.search(new TermQuery(new Term("filter",
"two")), 10);


	assertEquals("Filtered hits before grouping", 4, topResults.totalHits);

	PerParentLimitedQuery perParentLimitQuery = new
PerParentLimitedQuery(new TermQuery(new Term("filter", "two")),
			new QueryWrapperFilter(new TermQuery(new Term("type", "parent"))), 1);

	topResults = searcher.search(perParentLimitQuery, 10);

	assertEquals("Filtered hits after grouping", 2, topResults.totalHits);
}

private void addDocument(IndexWriter writer, String id, String group,
String filter, String type)
		throws IOException {


	Document doc = new Document();
	doc.add(new Field("id", id, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("group", group, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("filter", filter, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("type", type, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));

	writer.addDocument(doc);
}

private void updateDocument(IndexWriter writer, String id, String
group, String filter, String type)
		throws IOException {

	Document doc = new Document();
	doc.add(new Field("id", id, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("group", group, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("filter", filter, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
	doc.add(new Field("type", type, Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));

	writer.updateDocument(new Term("id", id), doc);
}

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