Here you can find the source of isAncestorOf(Node node, Node descendant)
| Parameter | Description |
|---|---|
| node | The potential ancestor node |
| descendant | The potential descendant node |
public static boolean isAncestorOf(Node node, Node descendant)
//package com.java2s; /*/*from ww w . jav a 2s. co m*/ 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. */ import org.w3c.dom.Node; public class Main { /** * Checks whether a node is ancestor of another node. * * @param node * The potential ancestor node * @param descendant * The potential descendant node * @return True if node is ancestor of the descendant node */ public static boolean isAncestorOf(Node node, Node descendant) { if (node == null || descendant == null) { return false; } for (Node currentNode = descendant.getParentNode(); currentNode != null; currentNode = currentNode .getParentNode()) { if (currentNode == node) { return true; } } return false; } }