public void testNoMatchSize() throws Exception {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig(new MockAnalyzer(random()));
iwc.setMergePolicy(newLogMergePolicy());
RandomIndexWriter iw = new RandomIndexWriter(random(), dir, iwc);
FieldType offsetsType = new FieldType(TextField.TYPE_STORED);
offsetsType.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS);
Field body = new Field("body", "", offsetsType);
Field none = new Field("none", "", offsetsType);
Document doc = new Document();
doc.add(body);
doc.add(none);
String firstValue =
"This is a test. Just a test highlighting from postings. Feel free to ignore.";
body.setStringValue(firstValue);
none.setStringValue(firstValue);
iw.addDocument(doc);
IndexReader ir = iw.getReader();
iw.close();
Query query = new TermQuery(new Term("none", "highlighting"));
IndexSearcher searcher = newSearcher(ir);
TopDocs topDocs = searcher.search(query, 10, Sort.INDEXORDER);
assertThat(topDocs.totalHits, equalTo(1));
int docId = topDocs.scoreDocs[0].doc;
CustomPassageFormatter passageFormatter =
new CustomPassageFormatter("<b>", "</b>", new DefaultEncoder());
CustomPostingsHighlighter highlighter =
new CustomPostingsHighlighter(null, passageFormatter, firstValue, false);
Snippet[] snippets = highlighter.highlightField("body", query, searcher, docId, 5);
assertThat(snippets.length, equalTo(0));
highlighter = new CustomPostingsHighlighter(null, passageFormatter, firstValue, true);
snippets = highlighter.highlightField("body", query, searcher, docId, 5);
assertThat(snippets.length, equalTo(1));
assertThat(snippets[0].getText(), equalTo("This is a test."));
ir.close();
dir.close();
}
public void testCustomPostingsHighlighter() throws Exception {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig(new MockAnalyzer(random()));
iwc.setMergePolicy(newLogMergePolicy());
RandomIndexWriter iw = new RandomIndexWriter(random(), dir, iwc);
FieldType offsetsType = new FieldType(TextField.TYPE_STORED);
offsetsType.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS);
// good position but only one match
final String firstValue =
"This is a test. Just a test1 highlighting from postings highlighter.";
Field body = new Field("body", "", offsetsType);
Document doc = new Document();
doc.add(body);
body.setStringValue(firstValue);
// two matches, not the best snippet due to its length though
final String secondValue =
"This is the second highlighting value to perform highlighting on a longer text that gets scored lower.";
Field body2 = new Field("body", "", offsetsType);
doc.add(body2);
body2.setStringValue(secondValue);
// two matches and short, will be scored highest
final String thirdValue = "This is highlighting the third short highlighting value.";
Field body3 = new Field("body", "", offsetsType);
doc.add(body3);
body3.setStringValue(thirdValue);
// one match, same as first but at the end, will be scored lower due to its position
final String fourthValue = "Just a test4 highlighting from postings highlighter.";
Field body4 = new Field("body", "", offsetsType);
doc.add(body4);
body4.setStringValue(fourthValue);
iw.addDocument(doc);
IndexReader ir = iw.getReader();
iw.close();
String firstHlValue = "Just a test1 <b>highlighting</b> from postings highlighter.";
String secondHlValue =
"This is the second <b>highlighting</b> value to perform <b>highlighting</b> on a longer text that gets scored lower.";
String thirdHlValue = "This is <b>highlighting</b> the third short <b>highlighting</b> value.";
String fourthHlValue = "Just a test4 <b>highlighting</b> from postings highlighter.";
IndexSearcher searcher = newSearcher(ir);
Query query = new TermQuery(new Term("body", "highlighting"));
TopDocs topDocs = searcher.search(query, 10, Sort.INDEXORDER);
assertThat(topDocs.totalHits, equalTo(1));
int docId = topDocs.scoreDocs[0].doc;
String fieldValue =
firstValue
+ HighlightUtils.PARAGRAPH_SEPARATOR
+ secondValue
+ HighlightUtils.PARAGRAPH_SEPARATOR
+ thirdValue
+ HighlightUtils.PARAGRAPH_SEPARATOR
+ fourthValue;
CustomPostingsHighlighter highlighter =
new CustomPostingsHighlighter(
null,
new CustomPassageFormatter("<b>", "</b>", new DefaultEncoder()),
fieldValue,
false);
Snippet[] snippets = highlighter.highlightField("body", query, searcher, docId, 5);
assertThat(snippets.length, equalTo(4));
assertThat(snippets[0].getText(), equalTo(firstHlValue));
assertThat(snippets[1].getText(), equalTo(secondHlValue));
assertThat(snippets[2].getText(), equalTo(thirdHlValue));
assertThat(snippets[3].getText(), equalTo(fourthHlValue));
ir.close();
dir.close();
}