Java XML Element Namespace createNamespace(Element el, String ns)

Description

create Namespace

License

Apache License

Declaration

public static String createNamespace(Element el, String ns) 

Method Source Code

//package com.java2s;
/**//from   w  w  w.ja v  a 2s .c  o m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 javax.xml.XMLConstants;

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

public class Main {
    private static final String XMLNAMESPACE = "xmlns";

    public static String createNamespace(Element el, String ns) {
        String p = "ns1";
        int i = 1;
        while (getPrefix(el, ns) != null) {
            p = "ns" + i;
            i++;
        }
        addNamespacePrefix(el, ns, p);
        return p;
    }

    public static String getPrefix(Element el, String ns) {
        NamedNodeMap atts = el.getAttributes();
        for (int i = 0; i < atts.getLength(); i++) {
            Node node = atts.item(i);
            String name = node.getNodeName();
            if (ns.equals(node.getNodeValue())
                    && (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) {
                return node.getLocalName();
            }
        }
        return null;
    }

    /**
     * Add a namespace prefix definition to an element.
     * 
     * @param element
     * @param namespaceUri
     * @param prefix
     */
    public static void addNamespacePrefix(Element element, String namespaceUri, String prefix) {
        element.setAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, "xmlns:" + prefix, namespaceUri);
    }
}

Related

1. buildNamespacePrefixMap(final Element root)
2. byteArrayToElement(byte[] b, boolean namespaceAware)
3. createElement(final String namespace, final String localPart, final String value)
4. createElement(String namespaceURI, String name)
5. createElement(String namespaceURI, String name)
6. getAllNamespaceDeclarations(Element element)
7. getElementListNS(String namespace, Element element, String name)
8. getElementNS(String namespace, Element element, String name)
9. getNamespace(Element element)