DOMHelper.java Source code

Introduction

Here is the source code for DOMHelper.java

Source

/*
 * 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 <http://www.gnu.org/licenses/>.
 */
//package xades4j.utils;

import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * Utility methods for DOM nodes.
 * 
 * @author Lus
 */
public class DOMHelper {

    /**
     * Gets the first child element of a node.
     * @param node the node to get the child from
     * @return the first element child of {@code node} or {@code null} if none
     * @throws NullPointerException if {@code node} is {@code null}
     */
    public static Element getFirstChildElement(Node node) {
        node = node.getFirstChild();
        while (node != null && node.getNodeType() != Node.ELEMENT_NODE) {
            node = node.getNextSibling();
        }
        return (Element) node;
    }
}