org.apache.hadoop.hive.ql.lib.Node Maven / Gradle / Ivy
/*
* 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.hadoop.hive.ql.lib;
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
*/
List getChildren();
/**
* Gets the name of the node. This is used in the rule dispatchers.
*
* @return String
*/
String getName();
}