Java XML Element Find findElement(Element topElm, String localName, String namespace)

Description

Find element.

License

Open Source License

Parameter

Parameter	Description
topElm	the top elm
localName	the local name
namespace	the namespace

Return

the element

Declaration

public static Element findElement(Element topElm, String localName, String namespace) 

Method Source Code

//package com.java2s;
/*//from w ww  .j a v  a2s  .co  m
 * Metadata Editor
 * @author Jiri Kremser
 * 
 * 
 * 
 * Metadata Editor - Rich internet application for editing metadata.
 * Copyright (C) 2011  Jiri Kremser (kremser@mzk.cz)
 * Moravian Library in Brno
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * 
 */

import java.util.Stack;

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

public class Main {
    /**
     * Find element.
     * 
     * @param topElm
     *        the top elm
     * @param localName
     *        the local name
     * @param namespace
     *        the namespace
     * @return the element
     */
    public static Element findElement(Element topElm, String localName, String namespace) {
        Stack<Element> stack = new Stack<Element>();
        stack.push(topElm);
        while (!stack.isEmpty()) {
            Element curElm = stack.pop();
            if ((curElm.getLocalName().equals(localName))
                    && (namespacesAreSame(curElm.getNamespaceURI(), namespace))) {
                return curElm;
            }
            NodeList childNodes = curElm.getChildNodes();
            for (int i = 0, ll = childNodes.getLength(); i < ll; i++) {
                Node item = childNodes.item(i);
                if (item.getNodeType() == Node.ELEMENT_NODE) {
                    stack.push((Element) item);
                }
            }
        }
        return null;
    }

    /**
     * Namespaces are same.
     * 
     * @param fNamespace
     *        the f namespace
     * @param sNamespace
     *        the s namespace
     * @return true, if successful
     */
    private static boolean namespacesAreSame(String fNamespace, String sNamespace) {
        if ((fNamespace == null) && (sNamespace == null)) {
            return true;
        } else if (fNamespace != null) {
            return fNamespace.equals(sNamespace);
        } else
            return false;
    }
}

Related

1. findComponentElement(Element root)
2. findComponentElement(Element root)
3. findElement(Element element, String elementName)
4. findElement(Element element, String name)
5. findElement(Element root, String localName, String namespace)
6. findElement(final Element e, final String find)
7. findElement(final String idValue, final String idTagName, final String tagName, final Element root)
8. findElementAsString(final Element e, final String find)
9. findElementWithId(String id, Element root)