com.liferay.portal.search.solr.internal.query.MultiMatchQueryTranslatorImpl.java Source code

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Here is the source code for com.liferay.portal.search.solr.internal.query.MultiMatchQueryTranslatorImpl.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.portal.search.solr.internal.query;

import com.liferay.portal.kernel.search.generic.MultiMatchQuery;
import com.liferay.portal.search.solr.query.MultiMatchQueryTranslator;

import java.util.Map;

import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;

import org.osgi.service.component.annotations.Component;

/**
 * @author Michael C. Han
 */
@Component(immediate = true, service = MultiMatchQueryTranslator.class)
public class MultiMatchQueryTranslatorImpl implements MultiMatchQueryTranslator {

    @Override
    public org.apache.lucene.search.Query translate(MultiMatchQuery multiMatchQuery) {

        BooleanQuery booleanQuery = new BooleanQuery();

        MultiMatchQuery.Type multiMatchQueryType = multiMatchQuery.getType();

        Map<String, Float> fieldBoosts = multiMatchQuery.getFieldsBoosts();

        for (String field : multiMatchQuery.getFields()) {
            Term term = new Term(field, multiMatchQuery.getValue());

            Query query = null;

            if (multiMatchQueryType == MultiMatchQuery.Type.PHRASE) {
                PhraseQuery phraseQuery = new PhraseQuery();

                phraseQuery.add(term);

                if (multiMatchQuery.getSlop() != null) {
                    phraseQuery.setSlop(multiMatchQuery.getSlop());
                }

                query = phraseQuery;
            } else if (multiMatchQueryType == MultiMatchQuery.Type.PHRASE_PREFIX) {

                query = new PrefixQuery(term);
            } else {
                query = new TermQuery(term);
            }

            if (fieldBoosts.containsKey(field)) {
                Float fieldBoost = fieldBoosts.get(field);

                query.setBoost(fieldBoost);
            }

            booleanQuery.add(query, BooleanClause.Occur.SHOULD);
        }

        return booleanQuery;
    }

}