/**
* Flushes the given WordDelimiterConcatenation by either writing its concat and then clearing, or
* just clearing.
*
* @param concatenation WordDelimiterConcatenation that will be flushed
* @return {@code true} if the concatenation was written before it was cleared, {@code false}
* otherwise
*/
private boolean flushConcatenation(WordDelimiterConcatenation concatenation) {
lastConcatCount = concatenation.subwordCount;
if (concatenation.subwordCount != 1 || !shouldGenerateParts(concatenation.type)) {
concatenation.writeAndClear();
return true;
}
concatenation.clear();
return false;
}
@Override
public boolean incrementToken() throws IOException {
while (true) {
if (!hasSavedState) {
// process a new input word
if (!input.incrementToken()) {
return false;
}
int termLength = termAttribute.length();
char[] termBuffer = termAttribute.buffer();
accumPosInc += posIncAttribute.getPositionIncrement();
iterator.setText(termBuffer, termLength);
iterator.next();
// word of no delimiters, or protected word: just return it
if ((iterator.current == 0 && iterator.end == termLength)
|| (protWords != null && protWords.contains(termBuffer, 0, termLength))) {
posIncAttribute.setPositionIncrement(accumPosInc);
accumPosInc = 0;
first = false;
return true;
}
// word of simply delimiters
if (iterator.end == WordDelimiterIterator.DONE && !has(PRESERVE_ORIGINAL)) {
// if the posInc is 1, simply ignore it in the accumulation
// TODO: proper hole adjustment (FilteringTokenFilter-like) instead of this previous
// logic!
if (posIncAttribute.getPositionIncrement() == 1 && !first) {
accumPosInc--;
}
continue;
}
saveState();
hasOutputToken = false;
hasOutputFollowingOriginal = !has(PRESERVE_ORIGINAL);
lastConcatCount = 0;
if (has(PRESERVE_ORIGINAL)) {
posIncAttribute.setPositionIncrement(accumPosInc);
accumPosInc = 0;
first = false;
return true;
}
}
// at the end of the string, output any concatenations
if (iterator.end == WordDelimiterIterator.DONE) {
if (!concat.isEmpty()) {
if (flushConcatenation(concat)) {
buffer();
continue;
}
}
if (!concatAll.isEmpty()) {
// only if we haven't output this same combo above!
if (concatAll.subwordCount > lastConcatCount) {
concatAll.writeAndClear();
buffer();
continue;
}
concatAll.clear();
}
if (bufferedPos < bufferedLen) {
if (bufferedPos == 0) {
sorter.sort(0, bufferedLen);
}
clearAttributes();
restoreState(buffered[bufferedPos++]);
if (first && posIncAttribute.getPositionIncrement() == 0) {
// can easily happen with strange combinations (e.g. not outputting numbers, but
// concat-all)
posIncAttribute.setPositionIncrement(1);
}
first = false;
return true;
}
// no saved concatenations, on to the next input word
bufferedPos = bufferedLen = 0;
hasSavedState = false;
continue;
}
// word surrounded by delimiters: always output
if (iterator.isSingleWord()) {
generatePart(true);
iterator.next();
first = false;
return true;
}
int wordType = iterator.type();
// do we already have queued up incompatible concatenations?
if (!concat.isEmpty() && (concat.type & wordType) == 0) {
if (flushConcatenation(concat)) {
hasOutputToken = false;
buffer();
continue;
}
hasOutputToken = false;
}
// add subwords depending upon options
if (shouldConcatenate(wordType)) {
if (concat.isEmpty()) {
concat.type = wordType;
}
concatenate(concat);
}
// add all subwords (catenateAll)
if (has(CATENATE_ALL)) {
concatenate(concatAll);
}
// if we should output the word or number part
if (shouldGenerateParts(wordType)) {
generatePart(false);
buffer();
}
iterator.next();
}
}