/*
* This shows how to construct a phrase query containing shingles.
*/
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public void testShingleAnalyzerWrapperPhraseQuery() throws Exception
public virtual void testShingleAnalyzerWrapperPhraseQuery()
{
PhraseQuery q = new PhraseQuery();
TokenStream ts = analyzer.tokenStream("content", "this sentence");
try
{
int j = -1;
PositionIncrementAttribute posIncrAtt = ts.addAttribute(typeof(PositionIncrementAttribute));
CharTermAttribute termAtt = ts.addAttribute(typeof(CharTermAttribute));
ts.reset();
while (ts.incrementToken())
{
j += posIncrAtt.PositionIncrement;
string termText = termAtt.ToString();
q.add(new Term("content", termText), j);
}
ts.end();
}
finally
{
IOUtils.closeWhileHandlingException(ts);
}
ScoreDoc[] hits = searcher.search(q, null, 1000).scoreDocs;
int[] ranks = new int[] { 0 };
compareRanks(hits, ranks);
}
private IList <Query> BuildQueries()
{
IList <Query> queries = new List <Query>();
BooleanQuery booleanAB = new BooleanQuery();
booleanAB.add(new TermQuery(new Term("contents", "a")), BooleanClause.Occur_e.SHOULD);
booleanAB.add(new TermQuery(new Term("contents", "b")), BooleanClause.Occur_e.SHOULD);
queries.Add(booleanAB);
PhraseQuery phraseAB = new PhraseQuery();
phraseAB.add(new Term("contents", "a"));
phraseAB.add(new Term("contents", "b"));
queries.Add(phraseAB);
PhraseQuery phraseABC = new PhraseQuery();
phraseABC.add(new Term("contents", "a"));
phraseABC.add(new Term("contents", "b"));
phraseABC.add(new Term("contents", "c"));
queries.Add(phraseABC);
BooleanQuery booleanAC = new BooleanQuery();
booleanAC.add(new TermQuery(new Term("contents", "a")), BooleanClause.Occur_e.SHOULD);
booleanAC.add(new TermQuery(new Term("contents", "c")), BooleanClause.Occur_e.SHOULD);
queries.Add(booleanAC);
PhraseQuery phraseAC = new PhraseQuery();
phraseAC.add(new Term("contents", "a"));
phraseAC.add(new Term("contents", "c"));
queries.Add(phraseAC);
PhraseQuery phraseACE = new PhraseQuery();
phraseACE.add(new Term("contents", "a"));
phraseACE.add(new Term("contents", "c"));
phraseACE.add(new Term("contents", "e"));
queries.Add(phraseACE);
return(queries);
}
public virtual void TestDemo()
{
Analyzer analyzer = new MockAnalyzer(random());
// Store the index in memory:
Directory directory = newDirectory();
// To store an index on disk, use this instead:
// Directory directory = FSDirectory.open(new File("/tmp/testindex"));
RandomIndexWriter iwriter = new RandomIndexWriter(random(), directory, analyzer);
Document doc = new Document();
string longTerm = "longtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongtermlongterm";
string text = "this is the text to be indexed. " + longTerm;
doc.add(newTextField("fieldname", text, Field.Store.YES));
iwriter.addDocument(doc);
iwriter.close();
// Now search the index:
IndexReader ireader = DirectoryReader.open(directory); // read-only=true
IndexSearcher isearcher = newSearcher(ireader);
Assert.AreEqual(1, isearcher.search(new TermQuery(new Term("fieldname", longTerm)), 1).totalHits);
Query query = new TermQuery(new Term("fieldname", "text"));
TopDocs hits = isearcher.search(query, null, 1);
Assert.AreEqual(1, hits.totalHits);
// Iterate through the results:
for (int i = 0; i < hits.scoreDocs.length; i++)
{
Document hitDoc = isearcher.doc(hits.scoreDocs[i].doc);
Assert.AreEqual(text, hitDoc.get("fieldname"));
}
// Test simple phrase query
PhraseQuery phraseQuery = new PhraseQuery();
phraseQuery.add(new Term("fieldname", "to"));
phraseQuery.add(new Term("fieldname", "be"));
Assert.AreEqual(1, isearcher.search(phraseQuery, null, 1).totalHits);
ireader.close();
directory.close();
}
/*
* This shows how to construct a phrase query containing shingles.
*/
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public void testShingleAnalyzerWrapperPhraseQuery() throws Exception
public virtual void testShingleAnalyzerWrapperPhraseQuery()
{
PhraseQuery q = new PhraseQuery();
TokenStream ts = analyzer.tokenStream("content", "this sentence");
try
{
int j = -1;
PositionIncrementAttribute posIncrAtt = ts.addAttribute(typeof(PositionIncrementAttribute));
CharTermAttribute termAtt = ts.addAttribute(typeof(CharTermAttribute));
ts.reset();
while (ts.incrementToken())
{
j += posIncrAtt.PositionIncrement;
string termText = termAtt.ToString();
q.add(new Term("content", termText), j);
}
ts.end();
}
finally
{
IOUtils.closeWhileHandlingException(ts);
}
ScoreDoc[] hits = searcher.search(q, null, 1000).scoreDocs;
int[] ranks = new int[] {0};
compareRanks(hits, ranks);
}
