private Query computeQuery(String patternString) {
String upperPatternString = patternString.toUpperCase();
boolean hasBooleanSpecifiers =
upperPatternString.contains(" OR ")
|| upperPatternString.contains(" AND ") // $NON-NLS-1$ //$NON-NLS-2$
|| upperPatternString.contains(" NOT "); // $NON-NLS-1$
if (!hasBooleanSpecifiers
&& defaultField.equals(FIELD_SUMMARY)
&& !containsSpecialCharacters(patternString)) {
return new PrefixQuery(new Term(defaultField.getIndexKey(), patternString));
}
QueryParser qp =
new QueryParser(
Version.LUCENE_CURRENT, defaultField.getIndexKey(), TaskAnalyzer.instance());
Query q;
try {
q = qp.parse(patternString);
} catch (ParseException e) {
return new PrefixQuery(new Term(defaultField.getIndexKey(), patternString));
}
// relax term clauses to be prefix clauses so that we get results close
// to what we're expecting
// from previous task list search
if (q instanceof BooleanQuery) {
BooleanQuery query = (BooleanQuery) q;
for (BooleanClause clause : query.getClauses()) {
if (clause.getQuery() instanceof TermQuery) {
TermQuery termQuery = (TermQuery) clause.getQuery();
clause.setQuery(new PrefixQuery(termQuery.getTerm()));
}
if (!hasBooleanSpecifiers) {
clause.setOccur(Occur.MUST);
}
}
} else if (q instanceof TermQuery) {
return new PrefixQuery(((TermQuery) q).getTerm());
}
return q;
}
protected IndexWriter createIndexWriter(boolean create)
throws CorruptIndexException, LockObtainFailedException, IOException {
return new IndexWriter(
directory, TaskAnalyzer.instance(), create, IndexWriter.MaxFieldLength.UNLIMITED);
}
