public void TestSimpleHighlightTest()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)));
Document doc = new Document();
FieldType type = new FieldType(TextField.TYPE_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
Field field = new Field("field", "This is a test where foo is highlighed and should be highlighted", type);
doc.Add(field);
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IndexReader reader = DirectoryReader.Open(writer, true);
int docId = 0;
FieldQuery fieldQuery = highlighter.GetFieldQuery(new TermQuery(new Term("field", "foo")), reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 54, 1);
// highlighted results are centered
assertEquals("This is a test where <b>foo</b> is highlighed and should be highlighted", bestFragments[0]);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 52, 1);
assertEquals("This is a test where <b>foo</b> is highlighed and should be", bestFragments[0]);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 30, 1);
assertEquals("a test where <b>foo</b> is highlighed", bestFragments[0]);
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
public void TestMultiValuedSortByScore()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)));
Document doc = new Document();
FieldType type = new FieldType(TextField.TYPE_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
doc.Add(new Field("field", "zero if naught", type)); // The first two fields contain the best match
doc.Add(new Field("field", "hero of legend", type)); // but total a lower score (3) than the bottom
doc.Add(new Field("field", "naught of hero", type)); // two fields (4)
doc.Add(new Field("field", "naught of hero", type));
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
ScoreOrderFragmentsBuilder fragmentsBuilder = new ScoreOrderFragmentsBuilder();
fragmentsBuilder.IsDiscreteMultiValueHighlighting = (true);
IndexReader reader = DirectoryReader.Open(writer, true);
String[] preTags = new String[] { "<b>" };
String[] postTags = new String[] { "</b>" };
IEncoder encoder = new DefaultEncoder();
int docId = 0;
BooleanQuery query = new BooleanQuery();
query.Add(clause("field", "hero"), Occur.SHOULD);
query.Add(clause("field", "of"), Occur.SHOULD);
query.Add(clause("field", "legend"), Occur.SHOULD);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
foreach (IFragListBuilder fragListBuilder in new IFragListBuilder[] {
new SimpleFragListBuilder(), new WeightedFragListBuilder()
})
{
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 20, 1,
fragListBuilder, fragmentsBuilder, preTags, postTags, encoder);
assertEquals("<b>hero</b> <b>of</b> <b>legend</b>", bestFragments[0]);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 28, 1,
fragListBuilder, fragmentsBuilder, preTags, postTags, encoder);
assertEquals("<b>hero</b> <b>of</b> <b>legend</b>", bestFragments[0]);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 30000, 1,
fragListBuilder, fragmentsBuilder, preTags, postTags, encoder);
assertEquals("<b>hero</b> <b>of</b> <b>legend</b>", bestFragments[0]);
}
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
public void TestBoostedPhraseHighlightTest()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)));
Document doc = new Document();
FieldType type = new FieldType(TextField.TYPE_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
StringBuilder text = new StringBuilder();
text.append("words words junk junk junk junk junk junk junk junk highlight junk junk junk junk together junk ");
for (int i = 0; i < 10; i++)
{
text.append("junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk ");
}
text.append("highlight words together ");
for (int i = 0; i < 10; i++)
{
text.append("junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk junk ");
}
doc.Add(new Field("text", text.toString().Trim(), type));
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IndexReader reader = DirectoryReader.Open(writer, true);
// This mimics what some query parsers do to <highlight words together>
BooleanQuery terms = new BooleanQuery();
terms.Add(clause("text", "highlight"), Occur.MUST);
terms.Add(clause("text", "words"), Occur.MUST);
terms.Add(clause("text", "together"), Occur.MUST);
// This mimics what some query parsers do to <"highlight words together">
BooleanQuery phrase = new BooleanQuery();
phrase.Add(clause("text", "highlight", "words", "together"), Occur.MUST);
phrase.Boost = (100);
// Now combine those results in a boolean query which should pull the phrases to the front of the list of fragments
BooleanQuery query = new BooleanQuery();
query.Add(phrase, Occur.MUST);
query.Add(phrase, Occur.SHOULD);
FieldQuery fieldQuery = new FieldQuery(query, reader, true, false);
String fragment = highlighter.GetBestFragment(fieldQuery, reader, 0, "text", 100);
assertEquals("junk junk junk junk junk junk junk junk <b>highlight words together</b> junk junk junk junk junk junk junk junk", fragment);
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
public void TestCommonTermsQueryHighlight()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random, MockTokenizer.SIMPLE, true, MockTokenFilter.ENGLISH_STOPSET)));
FieldType type = new FieldType(TextField.TYPE_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
String[] texts =
{
"Hello this is a piece of text that is very long and contains too much preamble and the meat is really here which says kennedy has been shot",
"This piece of text refers to Kennedy at the beginning then has a longer piece of text that is very long in the middle and finally ends with another reference to Kennedy",
"JFK has been shot", "John Kennedy has been shot",
"This text has a typo in referring to Keneddy",
"wordx wordy wordz wordx wordy wordx worda wordb wordy wordc", "y z x y z a b", "lets is a the lets is a the lets is a the lets"
};
for (int i = 0; i < texts.Length; i++)
{
Document doc = new Document();
Field field = new Field("field", texts[i], type);
doc.Add(field);
writer.AddDocument(doc);
}
CommonTermsQuery query = new CommonTermsQuery(Occur.MUST, Occur.SHOULD, 2);
query.Add(new Term("field", "text"));
query.Add(new Term("field", "long"));
query.Add(new Term("field", "very"));
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IndexReader reader = DirectoryReader.Open(writer, true);
IndexSearcher searcher = NewSearcher(reader);
TopDocs hits = searcher.Search(query, 10);
assertEquals(2, hits.TotalHits);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader, hits.ScoreDocs[0].Doc, "field", 1000, 1);
assertEquals("This piece of <b>text</b> refers to Kennedy at the beginning then has a longer piece of <b>text</b> that is <b>very</b> <b>long</b> in the middle and finally ends with another reference to Kennedy", bestFragments[0]);
fieldQuery = highlighter.GetFieldQuery(query, reader);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, hits.ScoreDocs[1].Doc, "field", 1000, 1);
assertEquals("Hello this is a piece of <b>text</b> that is <b>very</b> <b>long</b> and contains too much preamble and the meat is really here which says kennedy has been shot", bestFragments[0]);
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
public void TestPhraseHighlightLongTextTest()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)));
Document doc = new Document();
FieldType type = new FieldType(TextField.TYPE_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
Field text = new Field("text",
"Netscape was the general name for a series of web browsers originally produced by Netscape Communications Corporation, now a subsidiary of AOL The original browser was once the dominant browser in terms of usage share, but as a result of the first browser war it lost virtually all of its share to Internet Explorer Netscape was discontinued and support for all Netscape browsers and client products was terminated on March 1, 2008 Netscape Navigator was the name of Netscape\u0027s web browser from versions 1.0 through 4.8 The first beta release versions of the browser were released in 1994 and known as Mosaic and then Mosaic Netscape until a legal challenge from the National Center for Supercomputing Applications (makers of NCSA Mosaic, which many of Netscape\u0027s founders used to develop), led to the name change to Netscape Navigator The company\u0027s name also changed from Mosaic Communications Corporation to Netscape Communications Corporation The browser was easily the most advanced...", type);
doc.Add(text);
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IndexReader reader = DirectoryReader.Open(writer, true);
int docId = 0;
String field = "text";
{
BooleanQuery query = new BooleanQuery();
query.Add(new TermQuery(new Term(field, "internet")), Occur.MUST);
query.Add(new TermQuery(new Term(field, "explorer")), Occur.MUST);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 128, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("first browser war it lost virtually all of its share to <b>Internet</b> <b>Explorer</b> Netscape was discontinued and support for all Netscape browsers", bestFragments[0]);
}
{
PhraseQuery query = new PhraseQuery();
query.Add(new Term(field, "internet"));
query.Add(new Term(field, "explorer"));
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 128, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("first browser war it lost virtually all of its share to <b>Internet Explorer</b> Netscape was discontinued and support for all Netscape browsers", bestFragments[0]);
}
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
private void matchedFieldsTestCase(bool useMatchedFields, bool fieldMatch, String fieldValue, String expected, params Query[] queryClauses)
{
Document doc = new Document();
FieldType stored = new FieldType(TextField.TYPE_STORED);
stored.StoreTermVectorOffsets = (true);
stored.StoreTermVectorPositions = (true);
stored.StoreTermVectors = (true);
stored.Freeze();
FieldType matched = new FieldType(TextField.TYPE_NOT_STORED);
matched.StoreTermVectorOffsets = (true);
matched.StoreTermVectorPositions = (true);
matched.StoreTermVectors = (true);
matched.Freeze();
doc.Add(new Field("field", fieldValue, stored)); // Whitespace tokenized with English stop words
doc.Add(new Field("field_exact", fieldValue, matched)); // Whitespace tokenized without stop words
doc.Add(new Field("field_super_exact", fieldValue, matched)); // Whitespace tokenized without toLower
doc.Add(new Field("field_characters", fieldValue, matched)); // Each letter is a token
doc.Add(new Field("field_tripples", fieldValue, matched)); // Every three letters is a token
doc.Add(new Field("field_sliced", fieldValue.Substring(0, // Sliced at 10 chars then analyzed just like field
Math.Min(fieldValue.Length - 1, 10) - 0), matched));
doc.Add(new Field("field_der_red", new CannedTokenStream( // Hacky field containing "der" and "red" at pos = 0
token("der", 1, 0, 3),
token("red", 0, 0, 3)
), matched));
Analyzer analyzer = new AnalyzerWrapperAnonymousHelper();
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, analyzer));
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IFragListBuilder fragListBuilder = new SimpleFragListBuilder();
IFragmentsBuilder fragmentsBuilder = new ScoreOrderFragmentsBuilder();
IndexReader reader = DirectoryReader.Open(writer, true);
String[] preTags = new String[] { "<b>" };
String[] postTags = new String[] { "</b>" };
IEncoder encoder = new DefaultEncoder();
int docId = 0;
BooleanQuery query = new BooleanQuery();
foreach (Query clause in queryClauses)
{
query.Add(clause, Occur.MUST);
}
FieldQuery fieldQuery = new FieldQuery(query, reader, true, fieldMatch);
String[] bestFragments;
if (useMatchedFields)
{
ISet <String> matchedFields = new HashSet <String>();
matchedFields.Add("field");
matchedFields.Add("field_exact");
matchedFields.Add("field_super_exact");
matchedFields.Add("field_characters");
matchedFields.Add("field_tripples");
matchedFields.Add("field_sliced");
matchedFields.Add("field_der_red");
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", matchedFields, 25, 1,
fragListBuilder, fragmentsBuilder, preTags, postTags, encoder);
}
else
{
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 25, 1,
fragListBuilder, fragmentsBuilder, preTags, postTags, encoder);
}
assertEquals(expected, bestFragments[0]);
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
public void TestBooleanPhraseWithSynonym()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)));
Document doc = new Document();
FieldType type = new FieldType(TextField.TYPE_NOT_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
Token syn = new Token("httpwwwfacebookcom", 6, 29);
syn.PositionIncrement = (0);
CannedTokenStream ts = new CannedTokenStream(
new Token("test", 0, 4),
new Token("http", 6, 10),
syn,
new Token("www", 13, 16),
new Token("facebook", 17, 25),
new Token("com", 26, 29)
);
Field field = new Field("field", ts, type);
doc.Add(field);
doc.Add(new StoredField("field", "Test: http://www.facebook.com"));
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IndexReader reader = DirectoryReader.Open(writer, true);
int docId = 0;
// query1: match
PhraseQuery pq = new PhraseQuery();
pq.Add(new Term("field", "test"));
pq.Add(new Term("field", "http"));
pq.Add(new Term("field", "www"));
pq.Add(new Term("field", "facebook"));
pq.Add(new Term("field", "com"));
FieldQuery fieldQuery = highlighter.GetFieldQuery(pq, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 54, 1);
assertEquals("<b>Test: http://www.facebook.com</b>", bestFragments[0]);
// query2: match
PhraseQuery pq2 = new PhraseQuery();
pq2.Add(new Term("field", "test"));
pq2.Add(new Term("field", "httpwwwfacebookcom"));
pq2.Add(new Term("field", "www"));
pq2.Add(new Term("field", "facebook"));
pq2.Add(new Term("field", "com"));
fieldQuery = highlighter.GetFieldQuery(pq2, reader);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 54, 1);
assertEquals("<b>Test: http://www.facebook.com</b>", bestFragments[0]);
// query3: OR query1 and query2 together
BooleanQuery bq = new BooleanQuery();
bq.Add(pq, Occur.SHOULD);
bq.Add(pq2, Occur.SHOULD);
fieldQuery = highlighter.GetFieldQuery(bq, reader);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader, docId, "field", 54, 1);
assertEquals("<b>Test: http://www.facebook.com</b>", bestFragments[0]);
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
public void TestPhraseHighlightTest()
{
Directory dir = NewDirectory();
IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)));
Document doc = new Document();
FieldType type = new FieldType(TextField.TYPE_STORED);
type.StoreTermVectorOffsets = (true);
type.StoreTermVectorPositions = (true);
type.StoreTermVectors = (true);
type.Freeze();
Field longTermField = new Field("long_term", "This is a test thisisaverylongwordandmakessurethisfails where foo is highlighed and should be highlighted", type);
Field noLongTermField = new Field("no_long_term", "This is a test where foo is highlighed and should be highlighted", type);
doc.Add(longTermField);
doc.Add(noLongTermField);
writer.AddDocument(doc);
FastVectorHighlighter highlighter = new FastVectorHighlighter();
IndexReader reader = DirectoryReader.Open(writer, true);
int docId = 0;
String field = "no_long_term";
{
BooleanQuery query = new BooleanQuery();
query.Add(new TermQuery(new Term(field, "test")), Occur.MUST);
query.Add(new TermQuery(new Term(field, "foo")), Occur.MUST);
query.Add(new TermQuery(new Term(field, "highlighed")), Occur.MUST);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 18, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("<b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
}
{
BooleanQuery query = new BooleanQuery();
PhraseQuery pq = new PhraseQuery();
pq.Add(new Term(field, "test"));
pq.Add(new Term(field, "foo"));
pq.Add(new Term(field, "highlighed"));
pq.Slop = (5);
query.Add(new TermQuery(new Term(field, "foo")), Occur.MUST);
query.Add(pq, Occur.MUST);
query.Add(new TermQuery(new Term(field, "highlighed")), Occur.MUST);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 18, 1);
// highlighted results are centered
assertEquals(0, bestFragments.Length);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 30, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("a <b>test</b> where <b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
}
{
PhraseQuery query = new PhraseQuery();
query.Add(new Term(field, "test"));
query.Add(new Term(field, "foo"));
query.Add(new Term(field, "highlighed"));
query.Slop = (3);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 18, 1);
// highlighted results are centered
assertEquals(0, bestFragments.Length);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 30, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("a <b>test</b> where <b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
}
{
PhraseQuery query = new PhraseQuery();
query.Add(new Term(field, "test"));
query.Add(new Term(field, "foo"));
query.Add(new Term(field, "highlighted"));
query.Slop = (30);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 18, 1);
assertEquals(0, bestFragments.Length);
}
{
BooleanQuery query = new BooleanQuery();
PhraseQuery pq = new PhraseQuery();
pq.Add(new Term(field, "test"));
pq.Add(new Term(field, "foo"));
pq.Add(new Term(field, "highlighed"));
pq.Slop = (5);
BooleanQuery inner = new BooleanQuery();
inner.Add(pq, Occur.MUST);
inner.Add(new TermQuery(new Term(field, "foo")), Occur.MUST);
query.Add(inner, Occur.MUST);
query.Add(pq, Occur.MUST);
query.Add(new TermQuery(new Term(field, "highlighed")), Occur.MUST);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 18, 1);
assertEquals(0, bestFragments.Length);
bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 30, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("a <b>test</b> where <b>foo</b> is <b>highlighed</b> and", bestFragments[0]);
}
field = "long_term";
{
BooleanQuery query = new BooleanQuery();
query.Add(new TermQuery(new Term(field,
"thisisaverylongwordandmakessurethisfails")), Occur.MUST);
query.Add(new TermQuery(new Term(field, "foo")), Occur.MUST);
query.Add(new TermQuery(new Term(field, "highlighed")), Occur.MUST);
FieldQuery fieldQuery = highlighter.GetFieldQuery(query, reader);
String[] bestFragments = highlighter.GetBestFragments(fieldQuery, reader,
docId, field, 18, 1);
// highlighted results are centered
assertEquals(1, bestFragments.Length);
assertEquals("<b>thisisaverylongwordandmakessurethisfails</b>",
bestFragments[0]);
}
reader.Dispose();
writer.Dispose();
dir.Dispose();
}
