/*
 * 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
 *
 * 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 org.apache.iotdb.db.sql.parse;

import java.util.List;

/**
 * This interface defines the functions needed by the walkers and dispatchers. These are implemented by the node of the
 * graph that needs to be walked.
 */
public interface Node {

  /**
   * Gets the vector of children nodes. This is used in the graph walker algorithms.
   *
   * @return List<?   extends   Node>
   */
  List<Node> getChildren();

  /**
   * Gets the name of the node. This is used in the rule dispatchers.
   *
   * @return String
   */
  String getName();
}
