| /** |
| * 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.ambari.server.api.util; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Basic implementation of TreeNode. |
| */ |
| public class TreeNodeImpl<T> implements TreeNode<T> { |
| |
| /** |
| * name of the node |
| */ |
| private String m_name; |
| |
| /** |
| * parent of the node |
| */ |
| private TreeNode<T> m_parent; |
| |
| /** |
| * child nodes |
| */ |
| private Map<String, TreeNode<T>> m_mapChildren = new HashMap<String, TreeNode<T>>(); |
| |
| /** |
| * associated object |
| */ |
| private T m_object; |
| |
| /** |
| * properties |
| */ |
| private Map<String, String> m_mapNodeProps; |
| |
| /** |
| * Constructor. |
| * |
| * @param parent parent node |
| * @param object associated object |
| * @param name node name |
| */ |
| public TreeNodeImpl(TreeNode<T> parent, T object, String name) { |
| m_parent = parent; |
| m_object = object; |
| m_name = name; |
| } |
| |
| @Override |
| public TreeNode<T> getParent() { |
| return m_parent; |
| } |
| |
| @Override |
| public Collection<TreeNode<T>> getChildren() { |
| return m_mapChildren.values(); |
| } |
| |
| @Override |
| public T getObject() { |
| return m_object; |
| } |
| |
| @Override |
| public void setName(String name) { |
| m_name = name; |
| } |
| |
| @Override |
| public String getName() { |
| return m_name; |
| } |
| |
| @Override |
| public void setParent(TreeNode<T> parent) { |
| m_parent = parent; |
| } |
| |
| @Override |
| public TreeNode<T> addChild(T child, String name) { |
| TreeNodeImpl<T> node = new TreeNodeImpl<T>(this, child, name); |
| m_mapChildren.put(name, node); |
| |
| return node; |
| } |
| |
| @Override |
| public TreeNode<T> addChild(TreeNode<T> child) { |
| child.setParent(this); |
| m_mapChildren.put(child.getName(), child); |
| |
| return child; |
| } |
| |
| @Override |
| public void setProperty(String name, String value) { |
| if (m_mapNodeProps == null) { |
| m_mapNodeProps = new HashMap<String, String>(); |
| } |
| m_mapNodeProps.put(name, value); |
| } |
| |
| @Override |
| public String getProperty(String name) { |
| return m_mapNodeProps == null ? null : m_mapNodeProps.get(name); |
| } |
| |
| @Override |
| public TreeNode<T> getChild(String name) { |
| if (name != null && name.contains("/")) { |
| int i = name.indexOf('/'); |
| String s = name.substring(0, i); |
| TreeNode<T> node = m_mapChildren.get(s); |
| return node == null ? null : node.getChild(name.substring(i + 1)); |
| } else { |
| return m_mapChildren.get(name); |
| } |
| } |
| } |