@Test
public void testVectorHighlighter() throws Exception {
Directory dir = new RAMDirectory();
IndexWriter indexWriter =
new IndexWriter(dir, Lucene.STANDARD_ANALYZER, true, IndexWriter.MaxFieldLength.UNLIMITED);
indexWriter.addDocument(
doc()
.add(field("_id", "1"))
.add(
field(
"content",
"the big bad dog",
Field.Store.YES,
Field.Index.ANALYZED,
Field.TermVector.WITH_POSITIONS_OFFSETS))
.build());
IndexReader reader = indexWriter.getReader();
IndexSearcher searcher = new IndexSearcher(reader);
TopDocs topDocs = searcher.search(new TermQuery(new Term("_id", "1")), 1);
assertThat(topDocs.totalHits, equalTo(1));
FastVectorHighlighter highlighter = new FastVectorHighlighter();
String fragment =
highlighter.getBestFragment(
highlighter.getFieldQuery(new TermQuery(new Term("content", "bad"))),
reader,
topDocs.scoreDocs[0].doc,
"content",
30);
assertThat(fragment, notNullValue());
System.out.println(fragment);
}
@Test
public void testVectorHighlighterPrefixQuery() throws Exception {
Directory dir = new RAMDirectory();
IndexWriter indexWriter =
new IndexWriter(dir, Lucene.STANDARD_ANALYZER, true, IndexWriter.MaxFieldLength.UNLIMITED);
indexWriter.addDocument(
doc()
.add(field("_id", "1"))
.add(
field(
"content",
"the big bad dog",
Field.Store.YES,
Field.Index.ANALYZED,
Field.TermVector.WITH_POSITIONS_OFFSETS))
.build());
IndexReader reader = indexWriter.getReader();
IndexSearcher searcher = new IndexSearcher(reader);
TopDocs topDocs = searcher.search(new TermQuery(new Term("_id", "1")), 1);
assertThat(topDocs.totalHits, equalTo(1));
FastVectorHighlighter highlighter = new FastVectorHighlighter();
PrefixQuery prefixQuery = new PrefixQuery(new Term("content", "ba"));
assertThat(
prefixQuery.getRewriteMethod().getClass().getName(),
equalTo(PrefixQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT.getClass().getName()));
String fragment =
highlighter.getBestFragment(
highlighter.getFieldQuery(prefixQuery),
reader,
topDocs.scoreDocs[0].doc,
"content",
30);
assertThat(fragment, nullValue());
prefixQuery.setRewriteMethod(PrefixQuery.SCORING_BOOLEAN_QUERY_REWRITE);
Query rewriteQuery = prefixQuery.rewrite(reader);
fragment =
highlighter.getBestFragment(
highlighter.getFieldQuery(rewriteQuery),
reader,
topDocs.scoreDocs[0].doc,
"content",
30);
assertThat(fragment, notNullValue());
System.out.println(fragment);
// now check with the custom field query
prefixQuery = new PrefixQuery(new Term("content", "ba"));
assertThat(
prefixQuery.getRewriteMethod().getClass().getName(),
equalTo(PrefixQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT.getClass().getName()));
CustomFieldQuery.reader.set(reader);
fragment =
highlighter.getBestFragment(
new CustomFieldQuery(prefixQuery, highlighter),
reader,
topDocs.scoreDocs[0].doc,
"content",
30);
assertThat(fragment, notNullValue());
System.out.println(fragment);
}