com.thoughtworks.studios.journey.utils.LuceneUtils.java Source code

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Here is the source code for com.thoughtworks.studios.journey.utils.LuceneUtils.java

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/**
 * This file is part of journey-neo4j-plugin. journey-neo4j-plugin is a neo4j server extension that provides out-of-box action path analysis features on top of the graph database.
 *
 * Copyright 2015 ThoughtWorks, Inc. and Pengchao Wang
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package com.thoughtworks.studios.journey.utils;

import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;

public class LuceneUtils {
    public static Query negate(Query query) {
        BooleanQuery bq = new BooleanQuery();
        bq.add(new MatchAllDocsQuery(), BooleanClause.Occur.MUST);
        bq.add(query, BooleanClause.Occur.MUST_NOT);
        return bq;
    }
}