com.soebes.supose.core.search.CustomQueryParser.java Source code

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Here is the source code for com.soebes.supose.core.search.CustomQueryParser.java

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/**
 * The (Su)bversion Re(po)sitory (S)earch (E)ngine (SupoSE for short).
 *
 * Copyright (c) 2007-2011 by SoftwareEntwicklung Beratung Schulung (SoEBeS)
 * Copyright (c) 2007-2011 by Karl Heinz Marbaise
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 * The License can viewed online under http://www.gnu.org/licenses/gpl.html
 * If you have any questions about the Software or about the license
 * just write an email to license@soebes.de
 */
package com.soebes.supose.core.search;

import org.apache.log4j.Logger;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.index.Term;
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.RangeQuery;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.BooleanClause.Occur;

import com.soebes.supose.core.FieldNames;

/**
 * The CustomQueryParser handles particular queries for revision ranges.
 * 
 * @author Karl Heinz Marbaise
 * 
 */
public class CustomQueryParser extends QueryParser {
    private static Logger LOGGER = Logger.getLogger(CustomQueryParser.class);

    public CustomQueryParser(FieldNames field, Analyzer analyzer) {
        super(field.getValue(), analyzer);
    }

    public CustomQueryParser(String field, Analyzer analyzer) {
        super(field, analyzer);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.apache.lucene.queryParser.QueryParser#getFieldQuery(java.lang.String,
     * java.lang.String)
     */
    @Override
    protected Query getFieldQuery(String field, String term) throws ParseException {
        LOGGER.debug("getFieldQuery(): field:" + field + " Term: " + term);
        // This will handle the situation:
        // +revision:1
        if (FieldNames.REVISION.getValue().equals(field)) {
            int revision = Integer.parseInt(term);
            term = NumberUtils.pad(revision);
        }

        if (FieldNames.FILENAME.getValue().equals(field)) {
            Term t = new Term(FieldNames.FILENAME.getValue(), term.toLowerCase());
            TermQuery tq = new TermQuery(t);
            BooleanQuery bq = new BooleanQuery();
            bq.add(tq, Occur.MUST);
            return bq;
        }
        return super.getFieldQuery(field, term);
    }

    /**
     * Special handling for the "revision" field, pads each part to match how it
     * was indexed.
     */
    @Override
    protected Query getRangeQuery(String field, String part1, String part2, boolean inclusive)
            throws ParseException {
        if (FieldNames.REVISION.getValue().equals(field)) {
            try {
                int num1 = Integer.parseInt(part1);
                int num2 = Integer.parseInt(part2);
                return new RangeQuery(new Term(field, NumberUtils.pad(num1)),
                        new Term(field, NumberUtils.pad(num2)), inclusive);
            } catch (NumberFormatException e) {
                throw new ParseException(e.getMessage());
            }
        }

        return super.getRangeQuery(field, part1, part2, inclusive);
    }

}