package act.cli.tree;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.cli.view.CliView;
import java.util.List;
/**
* Defines an abstract tree node that can be printed
* using {@link CliView#TREE Tree view}
*/
public interface TreeNode {
/**
* Returns {@code id} of this node.
* <p>
* The {@code id} of a node can be used to identify a
* node in a certain context In other words children
* nodes of the same parent node cannot share a same id
* </p>
* @return the node id
*/
String id();
/**
* Returns the label on the current tree node
* @return the label string
*/
String label();
/**
* Returns a list of child tree node
* @return the children list
*/
List<TreeNode> children();
}