/*
* 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.brooklyn.api.mgmt.rebind.mementos;
import java.util.List;
/**
* A simple tree structure, where a node references a parent and children using their ids.
*
* e.g. could be used to represent the entity hierarchy within mementos, where the
* String is the id of parent/child entities.
*
* @author aled
*/
public interface TreeNode {
/**
* The id of this node in the tree. This id will be used by the parent's getChildren(),
* and by each child's getParent().
*/
String getId();
/**
* The id of the parent entity, or null if none.
*/
String getParent();
/**
* The ids of the children.
*/
List<String> getChildren();
}