public override bool Next()
{
if (count == freq)
{
if (!positions.Next())
{
doc = System.Int32.MaxValue;
return(false);
}
doc = positions.Doc();
freq = positions.Freq();
count = 0;
}
position = positions.NextPosition();
count++;
return(true);
}
public override bool Next()
{
if (count == freq)
{
if (!internalPositions.Next())
{
internalDoc = int.MaxValue;
return(false);
}
internalDoc = internalPositions.Doc;
freq = internalPositions.Freq;
count = 0;
}
position = internalPositions.NextPosition();
count++;
return(true);
}
public virtual void TestCaching()
{
Directory dir = new RAMDirectory();
IndexWriter writer = new IndexWriter(dir, new SimpleAnalyzer(), IndexWriter.MaxFieldLength.LIMITED);
Document doc = new Document();
TokenStream stream = new AnonymousClassTokenStream(this);
stream = new CachingTokenFilter(stream);
doc.Add(new Field("preanalyzed", stream, TermVector.NO));
// 1) we consume all tokens twice before we add the doc to the index
checkTokens(stream);
stream.Reset();
checkTokens(stream);
// 2) now add the document to the index and verify if all tokens are indexed
// don't reset the stream here, the DocumentWriter should do that implicitly
writer.AddDocument(doc);
writer.Close();
IndexReader reader = IndexReader.Open(dir);
TermPositions termPositions = reader.TermPositions(new Term("preanalyzed", "term1"));
Assert.IsTrue(termPositions.Next());
Assert.AreEqual(1, termPositions.Freq());
Assert.AreEqual(0, termPositions.NextPosition());
termPositions.Seek(new Term("preanalyzed", "term2"));
Assert.IsTrue(termPositions.Next());
Assert.AreEqual(2, termPositions.Freq());
Assert.AreEqual(1, termPositions.NextPosition());
Assert.AreEqual(3, termPositions.NextPosition());
termPositions.Seek(new Term("preanalyzed", "term3"));
Assert.IsTrue(termPositions.Next());
Assert.AreEqual(1, termPositions.Freq());
Assert.AreEqual(2, termPositions.NextPosition());
reader.Close();
// 3) reset stream and consume tokens again
stream.Reset();
checkTokens(stream);
}
public virtual void TestPayloadsPos0()
{
Directory dir = new MockRAMDirectory();
IndexWriter writer = new IndexWriter(dir, new TestPayloadAnalyzer(), true,
IndexWriter.MaxFieldLength.LIMITED);
Document doc = new Document();
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.IO.StreamWriter sw = new System.IO.StreamWriter(ms);
sw.Write("a a b c d e a f g h i j a b k k");
// flush to stream & reset it's position so it can be read
sw.Flush();
ms.Position = 0;
doc.Add(new Field("content", new System.IO.StreamReader(ms)));
writer.AddDocument(doc);
IndexReader r = writer.GetReader();
TermPositions tp = r.TermPositions(new Term("content", "a"));
int count = 0;
Assert.IsTrue(tp.Next());
// "a" occurs 4 times
Assert.AreEqual(4, tp.Freq);
int expected = 0;
Assert.AreEqual(expected, tp.NextPosition());
Assert.AreEqual(1, tp.NextPosition());
Assert.AreEqual(3, tp.NextPosition());
Assert.AreEqual(6, tp.NextPosition());
// only one doc has "a"
Assert.IsFalse(tp.Next());
IndexSearcher is_Renamed = new IndexSearcher(r);
SpanTermQuery stq1 = new SpanTermQuery(new Term("content", "a"));
SpanTermQuery stq2 = new SpanTermQuery(new Term("content", "k"));
SpanQuery[] sqs = new SpanQuery[] { stq1, stq2 };
SpanNearQuery snq = new SpanNearQuery(sqs, 30, false);
count = 0;
bool sawZero = false;
//System.out.println("\ngetPayloadSpans test");
Lucene.Net.Search.Spans.Spans pspans = snq.GetSpans(is_Renamed.IndexReader);
while (pspans.Next())
{
//System.out.println(pspans.doc() + " - " + pspans.start() + " - "+ pspans.end());
System.Collections.Generic.ICollection <byte[]> payloads = pspans.GetPayload();
sawZero |= pspans.Start() == 0;
for (System.Collections.IEnumerator it = payloads.GetEnumerator(); it.MoveNext();)
{
count++;
System.Object generatedAux2 = it.Current;
//System.out.println(new String((byte[]) it.next()));
}
}
Assert.AreEqual(5, count);
Assert.IsTrue(sawZero);
//System.out.println("\ngetSpans test");
Lucene.Net.Search.Spans.Spans spans = snq.GetSpans(is_Renamed.IndexReader);
count = 0;
sawZero = false;
while (spans.Next())
{
count++;
sawZero |= spans.Start() == 0;
//System.out.println(spans.doc() + " - " + spans.start() + " - " + spans.end());
}
Assert.AreEqual(4, count);
Assert.IsTrue(sawZero);
//System.out.println("\nPayloadSpanUtil test");
sawZero = false;
PayloadSpanUtil psu = new PayloadSpanUtil(is_Renamed.IndexReader);
System.Collections.Generic.ICollection <byte[]> pls = psu.GetPayloadsForQuery(snq);
count = pls.Count;
for (System.Collections.IEnumerator it = pls.GetEnumerator(); it.MoveNext();)
{
System.String s = new System.String(System.Text.UTF8Encoding.UTF8.GetChars((byte[])it.Current));
//System.out.println(s);
sawZero |= s.Equals("pos: 0");
}
Assert.AreEqual(5, count);
Assert.IsTrue(sawZero);
writer.Close();
is_Renamed.IndexReader.Close();
dir.Close();
}
public virtual void TestSetPosition()
{
Analyzer analyzer = new AnonymousClassAnalyzer(this);
Directory store = new MockRAMDirectory();
IndexWriter writer = new IndexWriter(store, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);
Document d = new Document();
d.Add(new Field("field", "bogus", Field.Store.YES, Field.Index.ANALYZED));
writer.AddDocument(d);
writer.Optimize();
writer.Close();
IndexSearcher searcher = new IndexSearcher(store, true);
TermPositions pos = searcher.IndexReader.TermPositions(new Term("field", "1"));
pos.Next();
// first token should be at position 0
Assert.AreEqual(0, pos.NextPosition());
pos = searcher.IndexReader.TermPositions(new Term("field", "2"));
pos.Next();
// second token should be at position 2
Assert.AreEqual(2, pos.NextPosition());
PhraseQuery q;
ScoreDoc[] hits;
q = new PhraseQuery();
q.Add(new Term("field", "1"));
q.Add(new Term("field", "2"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// same as previous, just specify positions explicitely.
q = new PhraseQuery();
q.Add(new Term("field", "1"), 0);
q.Add(new Term("field", "2"), 1);
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// specifying correct positions should find the phrase.
q = new PhraseQuery();
q.Add(new Term("field", "1"), 0);
q.Add(new Term("field", "2"), 2);
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
q = new PhraseQuery();
q.Add(new Term("field", "2"));
q.Add(new Term("field", "3"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
q = new PhraseQuery();
q.Add(new Term("field", "3"));
q.Add(new Term("field", "4"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// phrase query would find it when correct positions are specified.
q = new PhraseQuery();
q.Add(new Term("field", "3"), 0);
q.Add(new Term("field", "4"), 0);
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
// phrase query should fail for non existing searched term
// even if there exist another searched terms in the same searched position.
q = new PhraseQuery();
q.Add(new Term("field", "3"), 0);
q.Add(new Term("field", "9"), 0);
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// multi-phrase query should succed for non existing searched term
// because there exist another searched terms in the same searched position.
MultiPhraseQuery mq = new MultiPhraseQuery();
mq.Add(new Term[] { new Term("field", "3"), new Term("field", "9") }, 0);
hits = searcher.Search(mq, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
q = new PhraseQuery();
q.Add(new Term("field", "2"));
q.Add(new Term("field", "4"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
q = new PhraseQuery();
q.Add(new Term("field", "3"));
q.Add(new Term("field", "5"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
q = new PhraseQuery();
q.Add(new Term("field", "4"));
q.Add(new Term("field", "5"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
q = new PhraseQuery();
q.Add(new Term("field", "2"));
q.Add(new Term("field", "5"));
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// should not find "1 2" because there is a gap of 1 in the index
QueryParser qp = new QueryParser(Util.Version.LUCENE_CURRENT, "field", new StopWhitespaceAnalyzer(false));
q = (PhraseQuery)qp.Parse("\"1 2\"");
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// omitted stop word cannot help because stop filter swallows the increments.
q = (PhraseQuery)qp.Parse("\"1 stop 2\"");
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// query parser alone won't help, because stop filter swallows the increments.
qp.EnablePositionIncrements = true;
q = (PhraseQuery)qp.Parse("\"1 stop 2\"");
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// stop filter alone won't help, because query parser swallows the increments.
qp.EnablePositionIncrements = false;
q = (PhraseQuery)qp.Parse("\"1 stop 2\"");
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(0, hits.Length);
// when both qp qnd stopFilter propagate increments, we should find the doc.
qp = new QueryParser(Util.Version.LUCENE_CURRENT, "field", new StopWhitespaceAnalyzer(true));
qp.EnablePositionIncrements = true;
q = (PhraseQuery)qp.Parse("\"1 stop 2\"");
hits = searcher.Search(q, null, 1000).ScoreDocs;
Assert.AreEqual(1, hits.Length);
}
