Java XML Element Get getElementNamespaceURI(Element element)

Description

get Element Namespace URI

License

Apache License

Declaration

public static String getElementNamespaceURI(Element element) 

Method Source Code

//package com.java2s;
/*//from w  w w . ja  v a  2  s .  c  o  m
 * $Header$
 * $Revision: 207706 $
 * $Date: 2004-08-30 16:08:10 +0800 (Mon, 30 Aug 2004) $
 *
 * ====================================================================
 *
 * Copyright 1999-2002 The Apache Software Foundation 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

import org.w3c.dom.Element;

import org.w3c.dom.Node;

public class Main {
    public static String getElementNamespaceURI(Element element) {
        String namespace = null;

        if (element == null) {
            throw new IllegalArgumentException("The element cannot be null");
        } else {
            try {
                namespace = element.getNamespaceURI();
            } catch (NoSuchMethodError e) {
                String tagName = element.getTagName();
                String attribute = "xmlns";
                int index = tagName.indexOf(":");
                if (index > 0 && index < (tagName.length() - 1)) {
                    attribute += (":" + tagName.substring(0, index));
                }

                boolean found = false;
                for (Node node = element; !found && node != null; node = node.getParentNode()) {
                    try {
                        String tmp = ((Element) node).getAttribute(attribute);
                        if (tmp != null && !tmp.equals("")) {
                            namespace = tmp;
                            found = true;
                        }
                    } catch (ClassCastException f) {
                        // this will happen for Documents
                    }
                }
            }
        }

        return namespace;
    }
}

Related

1. getElementName(Element element)
2. getElementName(Field field)
3. getElementName(Object obj)
4. getElementNameSansNamespace(Element element)
5. getElementNamespaces(Element element, Set namespaces)
6. getElementNS(Element el, String nsuri, String name)
7. getElementNS(Element elem, String namespaceUri, String localName)
8. getElementNS(Element root, Set nsUris, String wantedLocalName)
9. getElementPath(Element elem)