source = analyzer.reusableTokenStream(field, new StringReader(queryText));
source.reset();
} catch (IOException e) {
source = analyzer.tokenStream(field, new StringReader(queryText));
}
CachingTokenFilter buffer = new CachingTokenFilter(source);
CharTermAttribute termAtt = null;
PositionIncrementAttribute posIncrAtt = null;
int numTokens = 0;
boolean success = false;
try {
buffer.reset();
success = true;
} catch (IOException e) {
// success==false if we hit an exception
}
if (success) {
if (buffer.hasAttribute(CharTermAttribute.class)) {
termAtt = buffer.getAttribute(CharTermAttribute.class);
}
if (buffer.hasAttribute(PositionIncrementAttribute.class)) {
posIncrAtt = buffer.getAttribute(PositionIncrementAttribute.class);
}
}
int positionCount = 0;
boolean severalTokensAtSamePosition = false;
boolean hasMoreTokens = false;
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
}
}
try {
// rewind the buffer stream
buffer.reset();
// close original stream - all tokens buffered
source.close();
}
catch (IOException e) {
// ignore
}
if (numTokens == 0)
return null;
else if (numTokens == 1) {
String term = null;
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
term = termAtt.toString();
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}
// return newTermQuery(new Term(field, term));
return new TermQuery(new Term(field, term));
} else {
if (severalTokensAtSamePosition) {
if (positionCount == 1) {
// no phrase query:
// BooleanQuery q = newBooleanQuery(true);
BooleanQuery q = new BooleanQuery(true);
for (int i = 0; i < numTokens; i++) {
String term = null;
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
term = termAtt.toString();
} catch (IOException e) {
// safe to ignore, because we know the number of tokens
}
// Query currentQuery = newTermQuery(new Term(field, term));
Query currentQuery = new TermQuery(new Term(field, term));
q.add(currentQuery, BooleanClause.Occur.SHOULD);
}
return q;
}
else {
// phrase query:
// MultiPhraseQuery mpq = newMultiPhraseQuery();
MultiPhraseQuery mpq = new MultiPhraseQuery();
mpq.setSlop(phraseSlop);
List multiTerms = new ArrayList();
int position = -1;
for (int i = 0; i < numTokens; i++) {
String term = null;
int positionIncrement = 1;
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
term = termAtt.toString();
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((Term[])multiTerms.toArray(new Term[0]),position);
} else {
mpq.add((Term[])multiTerms.toArray(new Term[0]));
}
multiTerms.clear();
}
position += positionIncrement;
multiTerms.add(new Term(field, term));
}
if (enablePositionIncrements) {
mpq.add((Term[])multiTerms.toArray(new Term[0]),position);
} else {
mpq.add((Term[])multiTerms.toArray(new Term[0]));
}
return mpq;
}
}
else {
// PhraseQuery pq = newPhraseQuery();
PhraseQuery pq = new PhraseQuery();
pq.setSlop(phraseSlop);
int position = -1;
for (int i = 0; i < numTokens; i++) {
String term = null;
int positionIncrement = 1;
try {
boolean hasNext = buffer.incrementToken();
assert hasNext == true;
term = termAtt.toString();
if (posIncrAtt != null) {
positionIncrement = posIncrAtt.getPositionIncrement();
}