org.apache.lucene.queryParser.ExistsFieldQueryExtension Maven / Gradle / Ivy
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* file to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.lucene.queryParser;
import org.apache.lucene.search.DeletionAwareConstantScoreQuery;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermRangeFilter;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.index.query.QueryParseContext;
import static org.elasticsearch.index.query.support.QueryParsers.wrapSmartNameFilter;
/**
*
*/
public class ExistsFieldQueryExtension implements FieldQueryExtension {
public static final String NAME = "_exists_";
@Override
public Query query(QueryParseContext parseContext, String queryText) {
String fieldName = queryText;
Filter filter = null;
MapperService.SmartNameFieldMappers smartNameFieldMappers = parseContext.smartFieldMappers(fieldName);
if (smartNameFieldMappers != null) {
if (smartNameFieldMappers.hasMapper()) {
filter = smartNameFieldMappers.mapper().rangeFilter(null, null, true, true, parseContext);
}
}
if (filter == null) {
filter = new TermRangeFilter(fieldName, null, null, true, true);
}
// we always cache this one, really does not change...
filter = parseContext.cacheFilter(filter, null);
filter = wrapSmartNameFilter(filter, smartNameFieldMappers, parseContext);
return new DeletionAwareConstantScoreQuery(filter);
}
}