edu.unika.aifb.graphindex.searcher.keyword.KeywordQueryParser.java Source code

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Here is the source code for edu.unika.aifb.graphindex.searcher.keyword.KeywordQueryParser.java

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package edu.unika.aifb.graphindex.searcher.keyword;

/**
 * Copyright (C) 2009 Lei Zhang (beyondlei at gmail.com)
 * 
 * This file is part of the graphindex project.
 *
 * graphindex is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2
 * as published by the Free Software Foundation.
 * 
 * graphindex is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with graphindex.  If not, see <http://www.gnu.org/licenses/>.
 */

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.BooleanClause.Occur;

public class KeywordQueryParser extends MultiFieldQueryParser {

    public KeywordQueryParser(String[] fields, Analyzer analyzer) {
        super(fields, analyzer);
    }

    public Query parse(String query, String[] fields) throws ParseException {
        BooleanQuery bQuery = new BooleanQuery();
        for (int i = 0; i < fields.length; i++) {
            QueryParser qp = new QueryParser(fields[i], getAnalyzer());
            qp.setDefaultOperator(QueryParser.AND_OPERATOR);
            Query q = qp.parse(query);
            bQuery.add(q, Occur.SHOULD);
        }
        return bQuery;
    }

    public Query parse(String query) throws ParseException {
        BooleanQuery bQuery = new BooleanQuery();
        for (int i = 0; i < fields.length; i++) {
            QueryParser qp = new QueryParser(fields[i], getAnalyzer());
            qp.setDefaultOperator(QueryParser.AND_OPERATOR);
            Query q = qp.parse(query);
            bQuery.add(q, Occur.SHOULD);
        }
        return bQuery;
    }
}