Gets the value of the DOM element's attribute with the given name as a Long, or null if the value is not a long. - Java XML

Java examples for XML:XML Attribute

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Description

Gets the value of the DOM element's attribute with the given name as a Long, or null if the value is not a long.

Demo Code

/*/*from w w w .  j  a  va  2  s .c  o m*/
 * ome.xml.DOMUtil
 *
 *-----------------------------------------------------------------------------
 *
 *  Copyright (C) 2007-2008 Open Microscopy Environment
 *      Massachusetts Institute of Technology,
 *      National Institutes of Health,
 *      University of Dundee,
 *      University of Wisconsin-Madison
 *
 *
 *
 *    This library 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 2.1 of the License, or (at your option) any later version.
 *
 *    This library 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 this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *-----------------------------------------------------------------------------
 */
//package com.java2s;

import org.w3c.dom.*;

public class Main {
    /**
     * Gets the value of the DOM element's attribute with the given name
     * as a Long, or null if the value is not a long.
     */
    public static Long getLongAttribute(String name, Element el) {
        return stringToLong(getAttribute(name, el));
    }

    private static Long stringToLong(String value) {
        if (value == null)
            return null;
        try {
            return new Long(value);
        } catch (NumberFormatException exc) {
            return null;
        }
    }

    /**
     * Gets the value of the given DOM element's attribute
     * with the specified name.
     */
    public static String getAttribute(String name, Element el) {
        if (name == null || el == null)
            return null;
        if (!el.hasAttribute(name))
            return null;
        return el.getAttribute(name);
    }
}

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