| /* |
| * 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.maven.settings; |
| |
| import java.io.Serializable; |
| |
| public abstract class BaseObject implements Serializable, Cloneable { |
| protected transient ChildrenTracking childrenTracking; |
| |
| protected Object delegate; |
| |
| public BaseObject() {} |
| |
| public BaseObject(Object delegate, BaseObject parent) { |
| this.delegate = delegate; |
| this.childrenTracking = parent != null ? parent::replace : null; |
| } |
| |
| public BaseObject(Object delegate, ChildrenTracking parent) { |
| this.delegate = delegate; |
| this.childrenTracking = parent; |
| } |
| |
| public Object getDelegate() { |
| return delegate; |
| } |
| |
| public void update(Object newDelegate) { |
| if (delegate != newDelegate) { |
| if (childrenTracking != null) { |
| childrenTracking.replace(delegate, newDelegate); |
| } |
| delegate = newDelegate; |
| } |
| } |
| |
| protected boolean replace(Object oldDelegate, Object newDelegate) { |
| return false; |
| } |
| |
| @FunctionalInterface |
| protected interface ChildrenTracking { |
| boolean replace(Object oldDelegate, Object newDelegate); |
| } |
| } |