http://lucene.apache.org/lucene-parent/lucene-queryparser: Lucene QueryParsers module (The Apache Software Foundation) 
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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
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 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.lucene.queryparser.flexible.standard.nodes;

import org.apache.lucene.queryparser.flexible.core.nodes.ModifierQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.standard.processors.BooleanQuery2ModifierNodeProcessor;


A BooleanModifierNode has the same behaviour as ModifierQueryNode, it only indicates that this modifier was added by BooleanQuery2ModifierNodeProcessor and not by the user. 
See Also:
/**
 * A {@link BooleanModifierNode} has the same behaviour as
 * {@link ModifierQueryNode}, it only indicates that this modifier was added by
 * {@link BooleanQuery2ModifierNodeProcessor} and not by the user.
 * 
 * @see ModifierQueryNode
 */
public class BooleanModifierNode extends ModifierQueryNode {

  public BooleanModifierNode(QueryNode node, Modifier mod) {
    super(node, mod);
  }

}