Gets the owner document of a node. : DOM Document « XML « Java

Gets the owner document of a node.

 * XAdES4j - A Java library for generation and verification of XAdES signatures.
 * Copyright (C) 2010 Luis Goncalves.
 * XAdES4j is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or any later version.
 * XAdES4j is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 * You should have received a copy of the GNU Lesser General Public License along
 * with XAdES4j. If not, see <>.
//package xades4j.utils;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

 * Utility methods for DOM nodes.
 * @author Lus
public class DOMHelper
     * Gets the owner document of a node.
     * @param node the node
     * @return the node's document or the node itself if it is a document node
     * @throws NullPointerException if {@code node} is {@code null}
    public static Document getOwnerDocument(Node node)
        if (node.getNodeType() == Node.DOCUMENT_NODE)
            return (Document)node;
        return node.getOwnerDocument();



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