/* (non-Javadoc)
* @see org.apache.lucene.xmlparser.QueryObjectBuilder#process(org.w3c.dom.Element)
*/
@Override
public Query getQuery(Element e) throws ParserException {
String fieldsList = e.getAttribute("fieldNames"); // a comma-delimited list of fields
String fields[] = defaultFieldNames;
if ((fieldsList != null) && (fieldsList.trim().length() > 0)) {
fields = fieldsList.trim().split(",");
// trim the fieldnames
for (int i = 0; i < fields.length; i++) {
fields[i] = fields[i].trim();
}
}
// Parse any "stopWords" attribute
// TODO MoreLikeThis needs to ideally have per-field stopWords lists - until then
// I use all analyzers/fields to generate multi-field compatible stop list
String stopWords = e.getAttribute("stopWords");
Set<String> stopWordsSet = null;
if ((stopWords != null) && (fields != null)) {
stopWordsSet = new HashSet<String>();
for (String field : fields) {
try (TokenStream ts = analyzer.tokenStream(field, stopWords)) {
CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
ts.reset();
while (ts.incrementToken()) {
stopWordsSet.add(termAtt.toString());
}
ts.end();
ts.close();
} catch (IOException ioe) {
throw new ParserException(
"IoException parsing stop words list in "
+ getClass().getName()
+ ":"
+ ioe.getLocalizedMessage());
}
}
}
MoreLikeThisQuery mlt = new MoreLikeThisQuery(DOMUtils.getText(e), fields, analyzer, fields[0]);
mlt.setMaxQueryTerms(DOMUtils.getAttribute(e, "maxQueryTerms", DEFAULT_MAX_QUERY_TERMS));
mlt.setMinTermFrequency(
DOMUtils.getAttribute(e, "minTermFrequency", DEFAULT_MIN_TERM_FREQUENCY));
mlt.setPercentTermsToMatch(
DOMUtils.getAttribute(e, "percentTermsToMatch", DEFAULT_PERCENT_TERMS_TO_MATCH) / 100);
mlt.setStopWords(stopWordsSet);
int minDocFreq = DOMUtils.getAttribute(e, "minDocFreq", -1);
if (minDocFreq >= 0) {
mlt.setMinDocFreq(minDocFreq);
}
mlt.setBoost(DOMUtils.getAttribute(e, "boost", 1.0f));
return mlt;
}
@Override
public Query getQuery(Element e) throws ParserException {
String text = DOMUtils.getText(e);
try {
Query q = null;
if (unSafeParser != null) {
// synchronize on unsafe parser
synchronized (unSafeParser) {
q = unSafeParser.parse(text);
}
} else {
String fieldName = DOMUtils.getAttribute(e, "fieldName", defaultField);
// Create new parser
QueryParser parser = createQueryParser(fieldName, analyzer);
q = parser.parse(text);
}
q.setBoost(DOMUtils.getAttribute(e, "boost", 1.0f));
return q;
} catch (ParseException e1) {
throw new ParserException(e1.getMessage());
}
}