org.apache.maven.toolchain.model.BaseObject 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.maven.toolchain.model;
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);
}
}