// TODO: Move to QueryParserTestBase once standard flexible parser gets this capability
public void testMultiWordSynonyms() throws Exception {
QueryParser dumb = new QueryParser("field", new Analyzer1());
dumb.setSplitOnWhitespace(false);
// A multi-word synonym source will form a synonym query for the same-starting-position tokens
BooleanQuery.Builder multiWordExpandedBqBuilder = new BooleanQuery.Builder();
Query multiWordSynonymQuery =
new SynonymQuery(new Term("field", "guinea"), new Term("field", "cavy"));
multiWordExpandedBqBuilder.add(multiWordSynonymQuery, BooleanClause.Occur.SHOULD);
multiWordExpandedBqBuilder.add(
new TermQuery(new Term("field", "pig")), BooleanClause.Occur.SHOULD);
Query multiWordExpandedBq = multiWordExpandedBqBuilder.build();
assertEquals(multiWordExpandedBq, dumb.parse("guinea pig"));
// With the phrase operator, a multi-word synonym source will form a multiphrase query.
// When the number of expanded term(s) is different from that of the original term(s), this is
// not good.
MultiPhraseQuery.Builder multiWordExpandedMpqBuilder = new MultiPhraseQuery.Builder();
multiWordExpandedMpqBuilder.add(
new Term[] {new Term("field", "guinea"), new Term("field", "cavy")});
multiWordExpandedMpqBuilder.add(new Term("field", "pig"));
Query multiWordExpandedMPQ = multiWordExpandedMpqBuilder.build();
assertEquals(multiWordExpandedMPQ, dumb.parse("\"guinea pig\""));
// custom behavior, the synonyms are expanded, unless you use quote operator
QueryParser smart = new SmartQueryParser();
smart.setSplitOnWhitespace(false);
assertEquals(multiWordExpandedBq, smart.parse("guinea pig"));
PhraseQuery.Builder multiWordUnexpandedPqBuilder = new PhraseQuery.Builder();
multiWordUnexpandedPqBuilder.add(new Term("field", "guinea"));
multiWordUnexpandedPqBuilder.add(new Term("field", "pig"));
Query multiWordUnexpandedPq = multiWordUnexpandedPqBuilder.build();
assertEquals(multiWordUnexpandedPq, smart.parse("\"guinea pig\""));
}
public QueryParser getParser(Analyzer a) throws Exception {
if (a == null) a = new MockAnalyzer(random(), MockTokenizer.SIMPLE, true);
QueryParser qp = new QueryParser(getDefaultField(), a);
qp.setDefaultOperator(QueryParserBase.OR_OPERATOR);
qp.setSplitOnWhitespace(splitOnWhitespace);
return qp;
}
