/*
* 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);
}
public PhoneticFilter(TokenStream input, Encoder encoder, string name, bool inject) : base(input)
{
this.encoder = encoder;
this.name = name;
this.inject = inject;
this.termAtt = (TermAttribute)addAttribute(typeof(TermAttribute));
this.posAtt = (PositionIncrementAttribute)addAttribute(typeof(PositionIncrementAttribute));
}
/**
* Converts the original query string to a collection of Lucene Tokens.
* @param original the original query string
* @return a Collection of Lucene Tokens
*/
public override Collection /*<Token>*/ convert(string original)
{
if (original == null) // this can happen with q.alt = and no query
{
return(Collections.emptyList());
}
Collection /*<Token>*/ result = new ArrayList/*<Token>*/ ();
//TODO: Extract the words using a simple regex, but not query stuff, and then analyze them to produce the token stream
Matcher matcher = QUERY_REGEX.matcher(original);
TokenStream stream;
while (matcher.find())
{
string word = matcher.group(0);
if (word.Equals("AND") == false && word.Equals("OR") == false)
{
try {
stream = analyzer.reusableTokenStream("", new StringReader(word));
// TODO: support custom attributes
TermAttribute termAtt = (TermAttribute)stream.addAttribute(typeof(TermAttribute));
FlagsAttribute flagsAtt = (FlagsAttribute)stream.addAttribute(typeof(FlagsAttribute));
TypeAttribute typeAtt = (TypeAttribute)stream.addAttribute(typeof(TypeAttribute));
PayloadAttribute payloadAtt = (PayloadAttribute)stream.addAttribute(typeof(PayloadAttribute));
PositionIncrementAttribute posIncAtt = (PositionIncrementAttribute)stream.addAttribute(typeof(PositionIncrementAttribute));
stream.reset();
while (stream.incrementToken())
{
Token token = new Token();
token.setTermBuffer(termAtt.termBuffer(), 0, termAtt.termLength());
token.setStartOffset(matcher.start());
token.setEndOffset(matcher.end());
token.setFlags(flagsAtt.getFlags());
token.setType(typeAtt.type());
token.setPayload(payloadAtt.getPayload());
token.setPositionIncrement(posIncAtt.getPositionIncrement());
result.add(token);
}
}
#pragma warning disable 168
catch (IOException e)
{
}
#pragma warning restore 168
}
}
return(result);
}
public PrefixAwareTokenFilter(TokenStream prefix, TokenStream suffix) : base(suffix)
{
this.suffix = suffix;
this.prefix = prefix;
prefixExhausted = false;
termAtt = addAttribute(typeof(CharTermAttribute));
posIncrAtt = addAttribute(typeof(PositionIncrementAttribute));
payloadAtt = addAttribute(typeof(PayloadAttribute));
offsetAtt = addAttribute(typeof(OffsetAttribute));
typeAtt = addAttribute(typeof(TypeAttribute));
flagsAtt = addAttribute(typeof(FlagsAttribute));
p_termAtt = prefix.addAttribute(typeof(CharTermAttribute));
p_posIncrAtt = prefix.addAttribute(typeof(PositionIncrementAttribute));
p_payloadAtt = prefix.addAttribute(typeof(PayloadAttribute));
p_offsetAtt = prefix.addAttribute(typeof(OffsetAttribute));
p_typeAtt = prefix.addAttribute(typeof(TypeAttribute));
p_flagsAtt = prefix.addAttribute(typeof(FlagsAttribute));
}
public PrefixAwareTokenFilter(TokenStream prefix, TokenStream suffix) : base(suffix)
{
this.suffix = suffix;
this.prefix = prefix;
prefixExhausted = false;
termAtt = addAttribute(typeof(CharTermAttribute));
posIncrAtt = addAttribute(typeof(PositionIncrementAttribute));
payloadAtt = addAttribute(typeof(PayloadAttribute));
offsetAtt = addAttribute(typeof(OffsetAttribute));
typeAtt = addAttribute(typeof(TypeAttribute));
flagsAtt = addAttribute(typeof(FlagsAttribute));
p_termAtt = prefix.addAttribute(typeof(CharTermAttribute));
p_posIncrAtt = prefix.addAttribute(typeof(PositionIncrementAttribute));
p_payloadAtt = prefix.addAttribute(typeof(PayloadAttribute));
p_offsetAtt = prefix.addAttribute(typeof(OffsetAttribute));
p_typeAtt = prefix.addAttribute(typeof(TypeAttribute));
p_flagsAtt = prefix.addAttribute(typeof(FlagsAttribute));
}
public TokenStreamAnonymousInnerClassHelper(TestRemoveDuplicatesTokenFilter outerInstance, IEnumerator<Token> toks)
{
this.outerInstance = outerInstance;
this.toks = toks;
termAtt = addAttribute(typeof(CharTermAttribute));
offsetAtt = addAttribute(typeof(OffsetAttribute));
posIncAtt = addAttribute(typeof(PositionIncrementAttribute));
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: static void testNGrams(int minGram, int maxGram, String s, final String nonTokenChars, boolean edgesOnly) throws java.io.IOException
//JAVA TO C# CONVERTER WARNING: 'final' parameters are not available in .NET:
internal static void testNGrams(int minGram, int maxGram, string s, string nonTokenChars, bool edgesOnly)
{
// convert the string to code points
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int[] codePoints = toCodePoints(s);
int[] codePoints = toCodePoints(s);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int[] offsets = new int[codePoints.length + 1];
int[] offsets = new int[codePoints.Length + 1];
for (int i = 0; i < codePoints.Length; ++i)
{
offsets[i + 1] = offsets[i] + char.charCount(codePoints[i]);
}
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final org.apache.lucene.analysis.TokenStream grams = new NGramTokenizer(TEST_VERSION_CURRENT, new java.io.StringReader(s), minGram, maxGram, edgesOnly)
TokenStream grams = new NGramTokenizerAnonymousInnerClassHelper(TEST_VERSION_CURRENT, new StringReader(s), minGram, maxGram, edgesOnly, nonTokenChars);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final org.apache.lucene.analysis.tokenattributes.CharTermAttribute termAtt = grams.addAttribute(org.apache.lucene.analysis.tokenattributes.CharTermAttribute.class);
CharTermAttribute termAtt = grams.addAttribute(typeof(CharTermAttribute));
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute posIncAtt = grams.addAttribute(org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute.class);
PositionIncrementAttribute posIncAtt = grams.addAttribute(typeof(PositionIncrementAttribute));
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final org.apache.lucene.analysis.tokenattributes.PositionLengthAttribute posLenAtt = grams.addAttribute(org.apache.lucene.analysis.tokenattributes.PositionLengthAttribute.class);
PositionLengthAttribute posLenAtt = grams.addAttribute(typeof(PositionLengthAttribute));
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final org.apache.lucene.analysis.tokenattributes.OffsetAttribute offsetAtt = grams.addAttribute(org.apache.lucene.analysis.tokenattributes.OffsetAttribute.class);
OffsetAttribute offsetAtt = grams.addAttribute(typeof(OffsetAttribute));
grams.reset();
for (int start = 0; start < codePoints.Length; ++start)
{
for (int end = start + minGram; end <= start + maxGram && end <= codePoints.Length; ++end)
{
if (edgesOnly && start > 0 && isTokenChar(nonTokenChars, codePoints[start - 1]))
{
// not on an edge
goto nextGramContinue;
}
for (int j = start; j < end; ++j)
{
if (!isTokenChar(nonTokenChars, codePoints[j]))
{
goto nextGramContinue;
}
}
assertTrue(grams.incrementToken());
assertArrayEquals(Arrays.copyOfRange(codePoints, start, end), toCodePoints(termAtt));
assertEquals(1, posIncAtt.PositionIncrement);
assertEquals(1, posLenAtt.PositionLength);
assertEquals(offsets[start], offsetAtt.startOffset());
assertEquals(offsets[end], offsetAtt.endOffset());
nextGramContinue :;
}
nextGramBreak :;
}
assertFalse(grams.incrementToken());
grams.end();
assertEquals(s.Length, offsetAtt.startOffset());
assertEquals(s.Length, offsetAtt.endOffset());
}
