@Override
public final boolean incrementToken() throws IOException {
clearAttributes();
if (delimitersCount == -1) {
int length = 0;
delimiterPositions.add(0);
while (true) {
int c = input.read();
if (c < 0) {
break;
}
length++;
if (c == delimiter) {
delimiterPositions.add(length);
resultToken.append(replacement);
} else {
resultToken.append((char) c);
}
}
delimitersCount = delimiterPositions.size();
if (delimiterPositions.get(delimitersCount - 1) < length) {
delimiterPositions.add(length);
delimitersCount++;
}
if (resultTokenBuffer.length < resultToken.length()) {
resultTokenBuffer = new char[resultToken.length()];
}
resultToken.getChars(0, resultToken.length(), resultTokenBuffer, 0);
resultToken.setLength(0);
int idx = delimitersCount - 1 - skip;
if (idx >= 0) {
// otherwise its ok, because we will skip and return false
endPosition = delimiterPositions.get(idx);
}
finalOffset = correctOffset(length);
posAtt.setPositionIncrement(1);
} else {
posAtt.setPositionIncrement(0);
}
while (skipped < delimitersCount - skip - 1) {
int start = delimiterPositions.get(skipped);
termAtt.copyBuffer(resultTokenBuffer, start, endPosition - start);
offsetAtt.setOffset(correctOffset(start), correctOffset(endPosition));
skipped++;
return true;
}
return false;
}
private String tokenizerToString(Tokenizer tokenizer) throws Exception {
OffsetAttribute extOffset = tokenizer.addAttribute(OffsetAttribute.class);
PositionIncrementAttribute posIncrAtt =
tokenizer.addAttribute(PositionIncrementAttribute.class);
PositionLengthAttribute posLengthAtt = tokenizer.addAttribute(PositionLengthAttribute.class);
CharTermAttribute term = tokenizer.addAttribute(CharTermAttribute.class);
TypeAttribute type = tokenizer.addAttribute(TypeAttribute.class);
SemanticClassAttribute semanticClass = tokenizer.addAttribute(SemanticClassAttribute.class);
PartOfSpeechAttribute pos = tokenizer.addAttribute(PartOfSpeechAttribute.class);
StringBuilder result = new StringBuilder();
tokenizer.reset();
while (tokenizer.incrementToken() == true) {
result.append(new String(term.buffer(), 0, term.length())).append(":");
result.append(type.type()).append(":");
result.append(pos.partOfSpeech()).append(":");
result.append(semanticClass.semanticClass()).append(":");
result.append(String.valueOf(posIncrAtt.getPositionIncrement())).append(":");
result.append(String.valueOf(posLengthAtt.getPositionLength())).append(":");
result.append(String.valueOf(extOffset.startOffset())).append(":");
result.append(String.valueOf(extOffset.endOffset()));
result.append(",");
}
tokenizer.end();
return result.toString();
}
/**
* Sugar: analyzes the text with the analyzer and separates by {@link
* SynonymMap#WORD_SEPARATOR}. reuse and its chars must not be null.
*/
public CharsRef analyze(String text, CharsRefBuilder reuse) throws IOException {
try (TokenStream ts = analyzer.tokenStream("", text)) {
CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
PositionIncrementAttribute posIncAtt = ts.addAttribute(PositionIncrementAttribute.class);
ts.reset();
reuse.clear();
while (ts.incrementToken()) {
int length = termAtt.length();
if (length == 0) {
throw new IllegalArgumentException(
"term: " + text + " analyzed to a zero-length token");
}
if (posIncAtt.getPositionIncrement() != 1) {
throw new IllegalArgumentException(
"term: " + text + " analyzed to a token with posinc != 1");
}
reuse.grow(reuse.length() + length + 1); /* current + word + separator */
int end = reuse.length();
if (reuse.length() > 0) {
reuse.setCharAt(end++, SynonymMap.WORD_SEPARATOR);
reuse.setLength(reuse.length() + 1);
}
System.arraycopy(termAtt.buffer(), 0, reuse.chars(), end, length);
reuse.setLength(reuse.length() + length);
}
ts.end();
}
if (reuse.length() == 0) {
throw new IllegalArgumentException(
"term: " + text + " was completely eliminated by analyzer");
}
return reuse.get();
}
@Override
public final boolean incrementToken() throws IOException {
if (isMailto) {
termAtt.setEmpty();
// return the scheme + the mail part
isMailto = false;
posIncrAtt.setPositionIncrement(0);
termAtt.copyBuffer(termBuffer.array(), 0, termBuffer.position());
return true;
}
if (input.incrementToken()) {
final String type = typeAtt.type();
if (type.equals(TupleTokenizer.getTokenTypes()[TupleTokenizer.URI])
&& this.isMailtoScheme()) {
this.updateBuffer();
termBuffer.put(termAtt.buffer(), 0, termAtt.length());
// return only the mail part
posIncrAtt.setPositionIncrement(1);
termAtt.copyBuffer(termBuffer.array(), 7, termBuffer.position() - 7);
}
return true;
}
return false;
}
@Override
public final void end() throws IOException {
super.end();
// set final offset
int finalOffset = correctOffset(this.endPosition);
offsetAtt.setOffset(finalOffset, finalOffset);
posIncrAtt.setPositionIncrement(posIncrAtt.getPositionIncrement() + skippedPositions);
}
private static String[] groupTokens(Analyzer analyzer, String input) throws IOException {
if (Resources.debug) {
Resources.LOGGER.debug("TokenParser:" + input);
Resources.LOGGER.debug("Analyzer:" + analyzer.getClass());
}
TokenStream tokenStream = analyzer.tokenStream("input", input);
OffsetAttribute offsetAttribute = tokenStream.addAttribute(OffsetAttribute.class);
PositionIncrementAttribute positionIncrementAttribute =
tokenStream.addAttribute(PositionIncrementAttribute.class);
CharTermAttribute charTermAttribute = tokenStream.addAttribute(CharTermAttribute.class);
TypeAttribute typeAttribute = tokenStream.addAttribute(TypeAttribute.class);
tokenStream.reset();
int position = 0;
List<TermInfo> infos = new ArrayList<TermInfo>();
while (tokenStream.incrementToken()) {
int increment = positionIncrementAttribute.getPositionIncrement();
if (increment > 0) {
position = position + increment;
if (Resources.debug) {
Resources.LOGGER.debug(position + ":");
}
}
int startOffset = offsetAttribute.startOffset();
int endOffset = offsetAttribute.endOffset();
String term = charTermAttribute.toString();
TermInfo info = new TermInfo();
info.setStart(startOffset);
info.setEnd(endOffset);
infos.add(info);
if (Resources.debug) {
Resources.LOGGER.debug(
"["
+ term
+ "]"
+ ":("
+ startOffset
+ "-->"
+ endOffset
+ "):"
+ typeAttribute.type());
}
}
tokenStream.end();
tokenStream.close();
Stack<TermInfo> tiStack = groupTokenInfos(infos);
List<String> terms = new ArrayList<String>();
while (!tiStack.isEmpty()) {
TermInfo termInfo = tiStack.pop();
if (termInfo.getEnd() <= input.length() && termInfo.getStart() >= 1) {
String term = input.substring(termInfo.getStart(), termInfo.getEnd());
terms.add(term);
}
}
return terms.toArray(new String[] {});
}
@Override
public final void end() throws IOException {
super.end();
// set final offset
int finalOffset = correctOffset(scanner.yychar() + scanner.yylength());
offsetAtt.setOffset(finalOffset, finalOffset);
// adjust any skipped tokens
posIncrAtt.setPositionIncrement(posIncrAtt.getPositionIncrement() + skippedPositions);
}
public static void displayPositionIncrements(Analyzer analyzer, String text) throws IOException {
TokenStream stream = analyzer.tokenStream("contents", new StringReader(text));
stream.reset();
PositionIncrementAttribute posIncr = stream.addAttribute(PositionIncrementAttribute.class);
while (stream.incrementToken()) {
System.out.println("posIncr=" + posIncr.getPositionIncrement());
}
stream.close();
}
public TermSubQueryFactory termToFactory(String fieldname, Term sourceTerm, FieldBoost boost)
throws IOException {
CacheKey cacheKey = null;
if (termQueryCache != null) {
cacheKey = new CacheKey(fieldname, sourceTerm);
TermQueryCacheValue cacheValue = termQueryCache.get(cacheKey);
if (cacheValue != null) {
// The cache references factories with pre-analyzed terms, or cache entries without a
// query factory if the term does not exist in the index. cacheValue.hasQuery() returns
// true/false correspondingly.
// Cache entries don't have a boost factor, it is only added later via the queryFactory.
return (cacheValue.hasQuery()) ? new TermSubQueryFactory(cacheValue, boost) : null;
}
}
LuceneQueryFactoryAndPRMSQuery root = null;
TokenStream ts = null;
try {
ts = analyzer.tokenStream(fieldname, new CharSequenceReader(sourceTerm));
CharTermAttribute termAttr = ts.addAttribute(CharTermAttribute.class);
PositionIncrementAttribute posIncAttr = ts.addAttribute(PositionIncrementAttribute.class);
ts.reset();
PositionSequence<org.apache.lucene.index.Term> sequence = new PositionSequence<>();
while (ts.incrementToken()) {
int inc = posIncAttr.getPositionIncrement();
if (inc > 0 || sequence.isEmpty()) {
sequence.nextPosition();
}
sequence.addElement(new org.apache.lucene.index.Term(fieldname, new BytesRef(termAttr)));
}
root = positionSequenceToQueryFactoryAndPRMS(sequence);
} finally {
if (ts != null) {
try {
ts.close();
} catch (IOException e) {
}
}
}
putQueryFactoryAndPRMSQueryIntoCache(cacheKey, root);
return root == null ? null : new TermSubQueryFactory(root, boost);
}
public static void displayTokensWithFullDetails(Analyzer analyzer, String text)
throws IOException {
TokenStream stream = analyzer.tokenStream("contents", new StringReader(text));
CharTermAttribute term = stream.addAttribute(CharTermAttribute.class);
PositionIncrementAttribute posIncr = stream.addAttribute(PositionIncrementAttribute.class);
OffsetAttribute offset = stream.addAttribute(OffsetAttribute.class);
TypeAttribute type = stream.addAttribute(TypeAttribute.class);
PayloadAttribute payload = stream.addAttribute(PayloadAttribute.class);
int position = 0;
while (stream.incrementToken()) {
int increment = posIncr.getPositionIncrement();
if (increment > 0) {
position = position + increment;
System.out.println();
System.out.print(position + ":");
}
BytesRef pl = payload.getPayload();
if (pl != null) {
System.out.print(
"["
+ term.toString()
+ ":"
+ offset.startOffset()
+ "->"
+ offset.endOffset()
+ ":"
+ type.type()
+ ":"
+ new String(pl.bytes)
+ "] ");
} else {
System.out.print(
"["
+ term.toString()
+ ":"
+ offset.startOffset()
+ "->"
+ offset.endOffset()
+ ":"
+ type.type()
+ "] ");
}
}
System.out.println();
}
public final boolean incrementToken() throws IOException {
int increment = 0;
while (input.incrementToken()) {
if (!stopWords.contains(termAttr.termBuffer(), 0, termAttr.termLength())) {
posIncrAttr.setPositionIncrement(posIncrAttr.getPositionIncrement() + increment);
return true;
}
increment += posIncrAttr.getPositionIncrement();
}
return false;
}
/**
* Count position increments in a token stream. Package private for testing.
*
* @param analyzer analyzer to create token stream
* @param fieldName field name to pass to analyzer
* @param fieldValue field value to pass to analyzer
* @return number of position increments in a token stream
* @throws IOException if tokenStream throws it
*/
static int countPositions(Analyzer analyzer, String fieldName, String fieldValue)
throws IOException {
try (TokenStream tokenStream = analyzer.tokenStream(fieldName, fieldValue)) {
int count = 0;
PositionIncrementAttribute position =
tokenStream.addAttribute(PositionIncrementAttribute.class);
tokenStream.reset();
while (tokenStream.incrementToken()) {
count += position.getPositionIncrement();
}
tokenStream.end();
count += position.getPositionIncrement();
return count;
}
}
@Override
public boolean incrementToken() throws IOException {
while (true) {
final boolean gotOne = input.incrementToken();
if (!gotOne) {
return false;
} else if (termAtt.toString().equals("a")) {
pendingPosInc += posIncAtt.getPositionIncrement();
} else {
posIncAtt.setPositionIncrement(pendingPosInc + posIncAtt.getPositionIncrement());
pendingPosInc = 0;
return true;
}
}
}
@Override
public boolean incrementToken() throws IOException {
// return the first non-stop word found
int skippedPositions = 0;
while (input.incrementToken()) {
if (!filter.run(termAtt.buffer(), 0, termAtt.length())) {
if (enablePositionIncrements) {
posIncrAtt.setPositionIncrement(posIncrAtt.getPositionIncrement() + skippedPositions);
}
return true;
}
skippedPositions += posIncrAtt.getPositionIncrement();
}
// reached EOS -- return false
return false;
}
/*
* (non-Javadoc)
*
* @see org.apache.lucene.analysis.TokenStream#next()
*/
@Override
public final boolean incrementToken() throws IOException {
clearAttributes();
skippedPositions = 0;
while (true) {
int tokenType = scanner.getNextToken();
if (tokenType == StandardTokenizerInterface.YYEOF) {
return false;
}
if (scanner.yylength() <= maxTokenLength) {
posIncrAtt.setPositionIncrement(skippedPositions + 1);
scanner.getText(termAtt);
final int start = scanner.yychar();
offsetAtt.setOffset(correctOffset(start), correctOffset(start + termAtt.length()));
// This 'if' should be removed in the next release. For now, it converts
// invalid acronyms to HOST. When removed, only the 'else' part should
// remain.
if (tokenType == StandardTokenizer.ACRONYM_DEP) {
typeAtt.setType(StandardTokenizer.TOKEN_TYPES[StandardTokenizer.HOST]);
termAtt.setLength(termAtt.length() - 1); // remove extra '.'
} else {
typeAtt.setType(StandardTokenizer.TOKEN_TYPES[tokenType]);
}
return true;
} else
// When we skip a too-long term, we still increment the
// position increment
skippedPositions++;
}
}
@Override
public boolean incrementToken() throws IOException {
if (!terms.isEmpty()) {
char[] buffer = terms.poll();
termAttribute.setEmpty();
termAttribute.copyBuffer(buffer, 0, buffer.length);
posIncAttr.setPositionIncrement(1);
return true;
}
if (!input.incrementToken()) {
return false;
} else {
final char term[] = termAttribute.buffer();
final int length = termAttribute.length();
int k = 0;
for (; k < length; k++) {
if (term[k] == tokenDelimiter) {
break;
}
}
LinkedList<CharBuffer> buffers = permuteTerms(term, 0, length);
Iterator iter = buffers.iterator();
while (iter.hasNext()) {
CharBuffer cb = (CharBuffer) iter.next();
terms.add(cb.array());
}
// we return true and leave the original token unchanged
return true;
}
}
/*
* (non-Javadoc)
*
* @see org.apache.lucene.analysis.TokenStream#next()
*/
@Override
public final boolean incrementToken() throws IOException {
clearAttributes();
skippedPositions = 0;
while (true) {
int tokenType = scanner.getNextToken();
if (tokenType == StandardTokenizerImpl.YYEOF) {
return false;
}
if (scanner.yylength() <= maxTokenLength) {
posIncrAtt.setPositionIncrement(skippedPositions + 1);
scanner.getText(termAtt);
final int start = scanner.yychar();
offsetAtt.setOffset(correctOffset(start), correctOffset(start + termAtt.length()));
typeAtt.setType(StandardTokenizer.TOKEN_TYPES[tokenType]);
return true;
} else
// When we skip a too-long term, we still increment the
// position increment
skippedPositions++;
}
}
@Override
public final boolean incrementToken() throws IOException {
if (!tokens.isEmpty()) {
assert current != null;
CompoundToken token = tokens.removeFirst();
restoreState(current); // keep all other attributes untouched
termAtt.setEmpty().append(token.txt);
offsetAtt.setOffset(token.startOffset, token.endOffset);
posIncAtt.setPositionIncrement(0);
return true;
}
current = null; // not really needed, but for safety
if (input.incrementToken()) {
// Only words longer than minWordSize get processed
if (termAtt.length() >= this.minWordSize) {
decompose();
// only capture the state if we really need it for producing new tokens
if (!tokens.isEmpty()) {
current = captureState();
}
}
// return original token:
return true;
} else {
return false;
}
}
/* (non-Javadoc)
* @see org.apache.lucene.analysis.TokenStream#incrementToken()
*/
@Override
public boolean incrementToken() throws IOException {
// 清除所有的词元属性
clearAttributes();
skippedPositions = 0;
Lexeme nextLexeme = _IKImplement.next();
if (nextLexeme != null) {
posIncrAtt.setPositionIncrement(skippedPositions + 1);
// 将Lexeme转成Attributes
// 设置词元文本
termAtt.append(nextLexeme.getLexemeText());
// 设置词元长度
termAtt.setLength(nextLexeme.getLength());
// 设置词元位移
offsetAtt.setOffset(
correctOffset(nextLexeme.getBeginPosition()), correctOffset(nextLexeme.getEndPosition()));
// 记录分词的最后位置
endPosition = nextLexeme.getEndPosition();
// 记录词元分类
typeAtt.setType(nextLexeme.getLexemeTypeString());
// 返会true告知还有下个词元
return true;
}
// 返会false告知词元输出完毕
return false;
}
private static String[] mmsegTokens(Analyzer analyzer, String input) throws IOException {
if (Resources.debug) {
Resources.LOGGER.debug("TokenParser:" + input);
Resources.LOGGER.debug("Analyzer:" + analyzer.getClass());
}
TokenStream tokenStream = analyzer.tokenStream("input", input);
OffsetAttribute offsetAttribute = tokenStream.addAttribute(OffsetAttribute.class);
PositionIncrementAttribute positionIncrementAttribute =
tokenStream.addAttribute(PositionIncrementAttribute.class);
CharTermAttribute charTermAttribute = tokenStream.addAttribute(CharTermAttribute.class);
TypeAttribute typeAttribute = tokenStream.addAttribute(TypeAttribute.class);
tokenStream.reset();
int position = 0;
List<String> tokens = new ArrayList<String>();
while (tokenStream.incrementToken()) {
int increment = positionIncrementAttribute.getPositionIncrement();
if (increment > 0) {
position = position + increment;
if (Resources.debug) {
Resources.LOGGER.debug(position + ":");
}
}
int startOffset = offsetAttribute.startOffset();
int endOffset = offsetAttribute.endOffset();
String term = charTermAttribute.toString();
tokens.add(term);
if (Resources.debug) {
Resources.LOGGER.debug(
"["
+ term
+ "]"
+ ":("
+ startOffset
+ "-->"
+ endOffset
+ "):"
+ typeAttribute.type());
}
}
tokenStream.end();
tokenStream.close();
return tokens.toArray(new String[] {});
}
@Override
public boolean incrementToken() throws IOException {
// parse() is able to return w/o producing any new
// tokens, when the tokens it had produced were entirely
// punctuation. So we loop here until we get a real
// token or we end:
while (pending.size() == 0) {
if (end) {
return false;
}
// Push Viterbi forward some more:
parse();
}
final Token token = pending.remove(pending.size() - 1);
int position = token.getPosition();
int length = token.getLength();
clearAttributes();
assert length > 0;
// System.out.println("off=" + token.getOffset() + " len=" + length + " vs " +
// token.getSurfaceForm().length);
termAtt.copyBuffer(token.getSurfaceForm(), token.getOffset(), length);
offsetAtt.setOffset(correctOffset(position), correctOffset(position + length));
basicFormAtt.setToken(token);
posAtt.setToken(token);
readingAtt.setToken(token);
inflectionAtt.setToken(token);
if (token.getPosition() == lastTokenPos) {
posIncAtt.setPositionIncrement(0);
posLengthAtt.setPositionLength(token.getPositionLength());
} else {
assert token.getPosition() > lastTokenPos;
posIncAtt.setPositionIncrement(1);
posLengthAtt.setPositionLength(1);
}
if (VERBOSE) {
System.out.println(Thread.currentThread().getName() + ": incToken: return token=" + token);
}
lastTokenPos = token.getPosition();
return true;
}
/* (non-Javadoc)
* @see org.apache.lucene.search.highlight.TextFragmenter#isNewFragment(org.apache.lucene.analysis.Token)
*/
public boolean isNewFragment() {
boolean isNewFrag = false;
int minFragLen = (int) ((1.0f - slop) * targetFragChars);
int endOffset = offsetAtt.endOffset();
// ** determin isNewFrag
if (posIncAtt.getPositionIncrement() > incrementGapThreshold) {
// large position gaps always imply new fragments
isNewFrag = true;
} else if (endOffset - currentOffset < minFragLen) {
// we're not in our range of flexibility
isNewFrag = false;
} else if (targetOffset > 0) {
// we've already decided on a target
isNewFrag = endOffset > targetOffset;
} else {
// we might be able to do something
int minOffset = currentOffset + minFragLen;
int maxOffset = (int) (currentOffset + (1.0f + slop) * targetFragChars);
int hotIndex;
// look for a close hotspot
hotIndex = Arrays.binarySearch(hotspots, endOffset);
if (hotIndex < 0) hotIndex = -hotIndex;
if (hotIndex >= hotspots.length) {
// no more hotspots in this input stream
targetOffset = currentOffset + targetFragChars;
} else if (hotspots[hotIndex] > maxOffset) {
// no hotspots within slop
targetOffset = currentOffset + targetFragChars;
} else {
// try to find hotspot in slop
int goal = hotspots[hotIndex];
while (goal < minOffset && hotIndex < hotspots.length) {
hotIndex++;
goal = hotspots[hotIndex];
}
targetOffset = goal <= maxOffset ? goal : currentOffset + targetFragChars;
}
isNewFrag = endOffset > targetOffset;
}
// ** operate on isNewFrag
if (isNewFrag) {
currentNumFrags++;
currentOffset = endOffset;
targetOffset = -1;
}
return isNewFrag;
}
@Override
public boolean incrementToken() throws IOException {
if (currentPrefix != null) {
if (!currentPrefix.hasNext()) {
return input.incrementToken();
} else {
posAttr.setPositionIncrement(0);
}
} else {
currentPrefix = prefixes.iterator();
termAttr.setEmpty();
posAttr.setPositionIncrement(1);
assert (currentPrefix.hasNext()) : "one or more prefixes needed";
}
termAttr.setEmpty();
termAttr.append(currentPrefix.next());
termAttr.append(separator);
return true;
}
public static void displayTokensWithFullDetails(Analyzer analyzer, String text)
throws IOException {
TokenStream stream =
analyzer.tokenStream(
"contents", // #A
new StringReader(text));
stream.reset();
CharTermAttribute term = stream.addAttribute(CharTermAttribute.class); // #B
PositionIncrementAttribute posIncr = // #B
stream.addAttribute(PositionIncrementAttribute.class); // #B
OffsetAttribute offset = stream.addAttribute(OffsetAttribute.class); // #B
TypeAttribute type = stream.addAttribute(TypeAttribute.class); // #B
int position = 0;
while (stream.incrementToken()) { // #C
int increment = posIncr.getPositionIncrement(); // #D
if (increment > 0) { // #D
position = position + increment; // #D
System.out.println(); // #D
System.out.print(position + ": "); // #D
}
System.out.print(
"["
+ // #E
term
+ ":"
+ // #E
offset.startOffset()
+ "->"
+ // #E
offset.endOffset()
+ ":"
+ // #E
type.type()
+ "] "); // #E
}
stream.close();
System.out.println();
}
@Override
public final boolean incrementToken() throws IOException {
while (true) {
if (curTermBuffer == null) {
if (!input.incrementToken()) {
return false;
} else {
curTermBuffer = termAtt.buffer().clone();
curTermLength = termAtt.length();
curCodePointCount = charUtils.codePointCount(termAtt);
curGramSize = minGram;
tokStart = offsetAtt.startOffset();
tokEnd = offsetAtt.endOffset();
savePosIncr += posIncrAtt.getPositionIncrement();
savePosLen = posLenAtt.getPositionLength();
}
}
if (curGramSize <= maxGram) { // if we have hit the end of our n-gram size range, quit
if (curGramSize
<= curCodePointCount) { // if the remaining input is too short, we can't generate any
// n-grams
// grab gramSize chars from front or back
clearAttributes();
offsetAtt.setOffset(tokStart, tokEnd);
// first ngram gets increment, others don't
if (curGramSize == minGram) {
posIncrAtt.setPositionIncrement(savePosIncr);
savePosIncr = 0;
} else {
posIncrAtt.setPositionIncrement(0);
}
posLenAtt.setPositionLength(savePosLen);
final int charLength =
charUtils.offsetByCodePoints(curTermBuffer, 0, curTermLength, 0, curGramSize);
termAtt.copyBuffer(curTermBuffer, 0, charLength);
curGramSize++;
return true;
}
}
curTermBuffer = null;
}
}
/* (non-Javadoc)
* @see org.apache.lucene.search.highlight.TextFragmenter#isNewFragment(org.apache.lucene.analysis.Token)
*/
@Override
public boolean isNewFragment() {
int endOffset = offsetAtt.endOffset();
boolean isNewFrag =
endOffset >= fragOffset + getFragmentSize()
|| posIncAtt.getPositionIncrement() > INCREMENT_THRESHOLD;
if (isNewFrag) {
fragOffset = endOffset;
}
return isNewFrag;
}
public static void displayTokensWithPositions(Analyzer analyzer, String text) throws IOException {
TokenStream stream = analyzer.tokenStream("contents", new StringReader(text));
CharTermAttribute term = stream.addAttribute(CharTermAttribute.class);
PositionIncrementAttribute posIncr = stream.addAttribute(PositionIncrementAttribute.class);
int position = 0;
while (stream.incrementToken()) {
int increment = posIncr.getPositionIncrement();
if (increment > 0) {
position = position + increment;
System.out.println();
System.out.print(position + ":");
}
System.out.print("[" + term.toString() + "] ");
}
System.out.println();
}
private void buffer() {
if (bufferedLen == buffered.length) {
int newSize = ArrayUtil.oversize(bufferedLen + 1, 8);
buffered = Arrays.copyOf(buffered, newSize);
startOff = Arrays.copyOf(startOff, newSize);
posInc = Arrays.copyOf(posInc, newSize);
}
startOff[bufferedLen] = offsetAttribute.startOffset();
posInc[bufferedLen] = posIncAttribute.getPositionIncrement();
buffered[bufferedLen] = captureState();
bufferedLen++;
}
@Override
public boolean incrementToken() {
clearAttributes();
if (upto == 4) {
return false;
}
if (upto == 0) {
posIncr.setPositionIncrement(1);
term.setEmpty().append("a");
} else if (upto == 1) {
posIncr.setPositionIncrement(1);
term.setEmpty().append("b");
} else if (upto == 2) {
posIncr.setPositionIncrement(0);
term.setEmpty().append("c");
} else {
posIncr.setPositionIncrement(0);
term.setEmpty().append("d");
}
upto++;
return true;
}
private void emit(char[] token) {
Log.debug("emit: " + new String(token));
if (replaceWhitespaceWith != null) {
token = replaceWhiteSpace(token);
}
CharTermAttribute termAttr = getTermAttribute();
termAttr.setEmpty();
termAttr.append(new StringBuilder().append(token));
OffsetAttribute offAttr = getOffsetAttribute();
if (offAttr != null && offAttr.endOffset() >= token.length) {
int start = offAttr.endOffset() - token.length;
offAttr.setOffset(start, offAttr.endOffset());
}
PositionIncrementAttribute pia = getPositionIncrementAttribute();
if (pia != null) {
pia.setPositionIncrement(++positionIncr);
}
lastEmitted = token;
}