/*
 * Anserini: A Lucene toolkit for reproducible information retrieval research
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.anserini.search.query;

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

/**
 * Class for exposing query building blocks for Pyserini. As Pyserini has trouble creating objects of classes that are
 * defined in other classes. It is possible to retrieve objects of such classes through here.
 */
public class QueryGeneratorUtils {
  static BooleanQuery.Builder getBooleanQueryBuilder() {
    return new BooleanQuery.Builder();
  }

  static BooleanClause.Occur getBooleanClauseShould() {
    return BooleanClause.Occur.SHOULD;
  }

  static BooleanClause.Occur getBooleanClauseMust() {
    return BooleanClause.Occur.MUST;
  }

  static BooleanClause.Occur getBooleanClauseMustNot() {
    return BooleanClause.Occur.MUST_NOT;
  }

  static BooleanClause.Occur getBooleanClauseFilter() {
    return BooleanClause.Occur.FILTER;
  }
}
