Checks if any of from the given list of nodes is an ancestor to another XML node - Java XML

Java examples for XML:XML Node

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Description

Checks if any of from the given list of nodes is an ancestor to another XML node

Demo Code

/*// w  w w .  java2  s .c o 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.

 */
//package com.java2s;

import java.util.ArrayList;

import org.w3c.dom.Node;

public class Main {
    /**
     * Checks if any of from the given list of nodes is an ancestor to another
     * node
     *
     * @param ancestorNodes
     *            The potential ancestor nodes
     * @param node
     *            The potential descendant node
     * @return True if at least one node is ancestor of the given node
     */
    public static boolean isAnyNodeAncestorOf(ArrayList ancestorNodes,
            Node node) {
        int n = ancestorNodes.size();
        for (int i = 0; i < n; i++) {
            Node ancestor = (Node) ancestorNodes.get(i);
            if (isAncestorOf(ancestor, node)) {
                return true;
            }
        }
        return false;
    }

    /**
     * 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;
    }
}

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