Finds the first (breadth first) DOM element with the specified name. - Java XML

Java examples for XML:DOM Element

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Description

Finds the first (breadth first) DOM element with the specified name.

Demo Code

/*/*  ww w  . j a  v  a 2 s  .  co  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 {
    /** Finds the first (breadth first) DOM element with the specified name. */
    public static Element findElement(String name, Document doc) {
        return findElement(name, null, null, doc);
    }

    /**
     * Finds the first (breadth first) DOM element with the specified
     * name that has an attribute with the given name and value.
     */
    public static Element findElement(String name, String attrName,
            String attrValue, Document doc) {
        if (name == null)
            return null;
        NodeList list = doc.getElementsByTagName(name);
        int size = list.getLength();
        for (int i = 0; i < size; i++) {
            Node node = list.item(i);
            if (!(node instanceof Element))
                continue;
            Element el = (Element) node;
            if (attrName == null || attrValue == null
                    || attrValue.equals(getAttribute(attrName, el))) {
                return el;
            }
        }
        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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