TestWildcardpublic class TestWildcard extends TestCase | TestWildcard tests the '*' and '?' wildcard characters. |
| Methods Summary |
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| private void | assertMatches(org.apache.lucene.search.IndexSearcher searcher, org.apache.lucene.search.Query q, int expectedMatches)
Hits result = searcher.search(q);
assertEquals(expectedMatches, result.length());
| | private org.apache.lucene.store.RAMDirectory | getIndexStore(java.lang.String field, java.lang.String[] contents)
RAMDirectory indexStore = new RAMDirectory();
IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true);
for (int i = 0; i < contents.length; ++i) {
Document doc = new Document();
doc.add(new Field(field, contents[i], Field.Store.YES, Field.Index.TOKENIZED));
writer.addDocument(doc);
}
writer.optimize();
writer.close();
return indexStore;
| | public void | testAsterisk()Tests Wildcard queries with an asterisk.
RAMDirectory indexStore = getIndexStore("body", new String[]
{"metal", "metals"});
IndexSearcher searcher = new IndexSearcher(indexStore);
Query query1 = new TermQuery(new Term("body", "metal"));
Query query2 = new WildcardQuery(new Term("body", "metal*"));
Query query3 = new WildcardQuery(new Term("body", "m*tal"));
Query query4 = new WildcardQuery(new Term("body", "m*tal*"));
Query query5 = new WildcardQuery(new Term("body", "m*tals"));
BooleanQuery query6 = new BooleanQuery();
query6.add(query5, BooleanClause.Occur.SHOULD);
BooleanQuery query7 = new BooleanQuery();
query7.add(query3, BooleanClause.Occur.SHOULD);
query7.add(query5, BooleanClause.Occur.SHOULD);
// Queries do not automatically lower-case search terms:
Query query8 = new WildcardQuery(new Term("body", "M*tal*"));
assertMatches(searcher, query1, 1);
assertMatches(searcher, query2, 2);
assertMatches(searcher, query3, 1);
assertMatches(searcher, query4, 2);
assertMatches(searcher, query5, 1);
assertMatches(searcher, query6, 1);
assertMatches(searcher, query7, 2);
assertMatches(searcher, query8, 0);
assertMatches(searcher, new WildcardQuery(new Term("body", "*tall")), 0);
assertMatches(searcher, new WildcardQuery(new Term("body", "*tal")), 1);
assertMatches(searcher, new WildcardQuery(new Term("body", "*tal*")), 2);
| | public void | testEquals()
WildcardQuery wq1 = new WildcardQuery(new Term("field", "b*a"));
WildcardQuery wq2 = new WildcardQuery(new Term("field", "b*a"));
WildcardQuery wq3 = new WildcardQuery(new Term("field", "b*a"));
// reflexive?
assertEquals(wq1, wq2);
assertEquals(wq2, wq1);
// transitive?
assertEquals(wq2, wq3);
assertEquals(wq1, wq3);
assertFalse(wq1.equals(null));
FuzzyQuery fq = new FuzzyQuery(new Term("field", "b*a"));
assertFalse(wq1.equals(fq));
assertFalse(fq.equals(wq1));
| | public void | testQuestionmark()Tests Wildcard queries with a question mark.
RAMDirectory indexStore = getIndexStore("body", new String[]
{"metal", "metals", "mXtals", "mXtXls"});
IndexSearcher searcher = new IndexSearcher(indexStore);
Query query1 = new WildcardQuery(new Term("body", "m?tal"));
Query query2 = new WildcardQuery(new Term("body", "metal?"));
Query query3 = new WildcardQuery(new Term("body", "metals?"));
Query query4 = new WildcardQuery(new Term("body", "m?t?ls"));
Query query5 = new WildcardQuery(new Term("body", "M?t?ls"));
Query query6 = new WildcardQuery(new Term("body", "meta??"));
assertMatches(searcher, query1, 1);
assertMatches(searcher, query2, 1);
assertMatches(searcher, query3, 0);
assertMatches(searcher, query4, 3);
assertMatches(searcher, query5, 0);
assertMatches(searcher, query6, 1); // Query: 'meta??' matches 'metals' not 'metal'
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