Examples with MatchNoDocsQuery org.apache.lucene.search.MatchNoDocsQuery used on opensource projects

Example 46 with MatchNoDocsQuery

use of org.apache.lucene.search.MatchNoDocsQuery in project lucene-solr by apache.

the class GraphTermsQParserPlugin method createParser.

@Override
public QParser createParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {
    return new QParser(qstr, localParams, params, req) {

        @Override
        public Query parse() throws SyntaxError {
            String fname = localParams.get(QueryParsing.F);
            FieldType ft = req.getSchema().getFieldTypeNoEx(fname);
            int maxDocFreq = localParams.getInt("maxDocFreq", Integer.MAX_VALUE);
            //never null
            String qstr = localParams.get(QueryParsing.V);
            if (qstr.length() == 0) {
                return new MatchNoDocsQuery();
            }
            final String[] splitVals = qstr.split(",");
            Term[] terms = new Term[splitVals.length];
            BytesRefBuilder term = new BytesRefBuilder();
            for (int i = 0; i < splitVals.length; i++) {
                String stringVal = splitVals[i].trim();
                if (ft != null) {
                    ft.readableToIndexed(stringVal, term);
                } else {
                    term.copyChars(stringVal);
                }
                BytesRef ref = term.toBytesRef();
                terms[i] = new Term(fname, ref);
            }
            ArrayUtil.timSort(terms);
            return new ConstantScoreQuery(new GraphTermsQuery(fname, terms, maxDocFreq));
        }
    };
}

Example 47 with MatchNoDocsQuery

use of org.apache.lucene.search.MatchNoDocsQuery in project crate by crate.

the class MultiPhrasePrefixQuery method rewrite.

@Override
public Query rewrite(IndexReader reader) throws IOException {
    Query rewritten = super.rewrite(reader);
    if (rewritten != this) {
        return rewritten;
    }
    if (termArrays.isEmpty()) {
        return new MatchNoDocsQuery();
    }
    MultiPhraseQuery.Builder query = new MultiPhraseQuery.Builder();
    query.setSlop(slop);
    int sizeMinus1 = termArrays.size() - 1;
    for (int i = 0; i < sizeMinus1; i++) {
        query.add(termArrays.get(i), positions.get(i));
    }
    Term[] suffixTerms = termArrays.get(sizeMinus1);
    int position = positions.get(sizeMinus1);
    ObjectHashSet<Term> terms = new ObjectHashSet<>();
    for (Term term : suffixTerms) {
        getPrefixTerms(terms, term, reader);
        if (terms.size() > maxExpansions) {
            break;
        }
    }
    if (terms.isEmpty()) {
        if (sizeMinus1 == 0) {
            // no prefix and the phrase query is empty
            return Queries.newMatchNoDocsQuery("No terms supplied for " + MultiPhrasePrefixQuery.class.getName());
        }
        // which rewrites query with an empty reader.
        return new BooleanQuery.Builder().add(query.build(), BooleanClause.Occur.MUST).add(Queries.newMatchNoDocsQuery("No terms supplied for " + MultiPhrasePrefixQuery.class.getName()), BooleanClause.Occur.MUST).build();
    }
    query.add(terms.toArray(Term.class), position);
    return query.build();
}