/**
* 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.filter;
import com.liferay.portal.kernel.search.filter.MissingFilter;
import com.liferay.portal.search.solr.filter.MissingFilterTranslator;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.TermRangeQuery;
import org.osgi.service.component.annotations.Component;
/**
* @author Michael C. Han
*/
@Component(immediate = true, service = MissingFilterTranslator.class)
public class MissingFilterTranslatorImpl implements MissingFilterTranslator {
@Override
public org.apache.lucene.search.Query translate(
MissingFilter missingFilter) {
BooleanQuery booleanQuery = new BooleanQuery();
MatchAllDocsQuery matchAllDocsQuery = new MatchAllDocsQuery();
booleanQuery.add(matchAllDocsQuery, BooleanClause.Occur.SHOULD);
TermRangeQuery termRangeQuery = TermRangeQuery.newStringRange(
missingFilter.getField(), "*", "*", true, true);
booleanQuery.add(termRangeQuery, BooleanClause.Occur.MUST_NOT);
return booleanQuery;
}
}