assert operator == BooleanClause.Occur.SHOULD || operator == BooleanClause.Occur.MUST;
// Use the analyzer to get all the tokens, and then build a TermQuery,
// PhraseQuery, or nothing based on the term count
CachingTokenFilter buffer = null;
TermToBytesRefAttribute termAtt = null;
PositionIncrementAttribute posIncrAtt = null;
int numTokens = 0;
int positionCount = 0;
boolean severalTokensAtSamePosition = false;
boolean hasMoreTokens = false;
TokenStream source = null;
try {
source = analyzer.tokenStream(field, queryText);
source.reset();
buffer = new CachingTokenFilter(source);
buffer.reset();
if (buffer.hasAttribute(TermToBytesRefAttribute.class)) {
termAtt = buffer.getAttribute(TermToBytesRefAttribute.class);
}
if (buffer.hasAttribute(PositionIncrementAttribute.class)) {
posIncrAtt = buffer.getAttribute(PositionIncrementAttribute.class);
}
if (termAtt != null) {
try {
hasMoreTokens = buffer.incrementToken();
while (hasMoreTokens) {
numTokens++;
int positionIncrement = (posIncrAtt != null) ? posIncrAtt.getPositionIncrement() : 1;
if (positionIncrement != 0) {
positionCount += positionIncrement;
} else {
severalTokensAtSamePosition = true;
}
hasMoreTokens = buffer.incrementToken();
}
} catch (IOException e) {
// ignore
}
}
} catch (IOException e) {
throw new RuntimeException("Error analyzing query text", e);
} finally {
IOUtils.closeWhileHandlingException(source);
}
// rewind the buffer stream
buffer.reset();
BytesRef bytes = termAtt == null ? null : termAtt.getBytesRef();
if (numTokens == 0)
return null;
else if (numTokens == 1) {
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
termAtt.fillBytesRef();
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}
return newTermQuery(new Term(field, BytesRef.deepCopyOf(bytes)));
} else {
if (severalTokensAtSamePosition || (!quoted)) {
if (positionCount == 1 || (!quoted)) {
// no phrase query:
if (positionCount == 1) {
// simple case: only one position, with synonyms
BooleanQuery q = newBooleanQuery(true);
for (int i = 0; i < numTokens; i++) {
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
termAtt.fillBytesRef();
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}
Query currentQuery = newTermQuery(
new Term(field, BytesRef.deepCopyOf(bytes)));
q.add(currentQuery, BooleanClause.Occur.SHOULD);
}
return q;
} else {
// multiple positions
BooleanQuery q = newBooleanQuery(false);
Query currentQuery = null;
for (int i = 0; i < numTokens; i++) {
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
termAtt.fillBytesRef();
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}
if (posIncrAtt != null && posIncrAtt.getPositionIncrement() == 0) {
if (!(currentQuery instanceof BooleanQuery)) {
Query t = currentQuery;
currentQuery = newBooleanQuery(true);
((BooleanQuery)currentQuery).add(t, BooleanClause.Occur.SHOULD);
}
((BooleanQuery)currentQuery).add(newTermQuery(new Term(field, BytesRef.deepCopyOf(bytes))), BooleanClause.Occur.SHOULD);
} else {
if (currentQuery != null) {
q.add(currentQuery, operator);
}
currentQuery = newTermQuery(new Term(field, BytesRef.deepCopyOf(bytes)));
}
}
q.add(currentQuery, operator);
return q;
}
} else {
// phrase query:
MultiPhraseQuery mpq = newMultiPhraseQuery();
mpq.setSlop(phraseSlop);
List<Term> multiTerms = new ArrayList<Term>();
int position = -1;
for (int i = 0; i < numTokens; i++) {
int positionIncrement = 1;
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
termAtt.fillBytesRef();
if (posIncrAtt != null) {
positionIncrement = posIncrAtt.getPositionIncrement();
}
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}
if (positionIncrement > 0 && multiTerms.size() > 0) {
if (enablePositionIncrements) {
mpq.add(multiTerms.toArray(new Term[0]),position);
} else {
mpq.add(multiTerms.toArray(new Term[0]));
}
multiTerms.clear();
}
position += positionIncrement;
multiTerms.add(new Term(field, BytesRef.deepCopyOf(bytes)));
}
if (enablePositionIncrements) {
mpq.add(multiTerms.toArray(new Term[0]),position);
} else {
mpq.add(multiTerms.toArray(new Term[0]));
}
return mpq;
}
} else {
PhraseQuery pq = newPhraseQuery();
pq.setSlop(phraseSlop);
int position = -1;
for (int i = 0; i < numTokens; i++) {
int positionIncrement = 1;
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
termAtt.fillBytesRef();
if (posIncrAtt != null) {
positionIncrement = posIncrAtt.getPositionIncrement();
}
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}