Java XML Element Namespace getNamespaceForPrefix(String prefix, Element element)

Description

get Namespace For Prefix

License

Apache License

Declaration

private static String getNamespaceForPrefix(String prefix, Element element) 

Method Source Code

//package com.java2s;
/**/*from   w ww .  j  a v  a2 s . co 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 org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

public class Main {
    private static final String XML_NS_NS = "http://www.w3.org/2000/xmlns/";

    private static String getNamespaceForPrefix(String prefix, Element element) {
        NamedNodeMap attributes = element.getAttributes();
        for (int i = 0; i < attributes.getLength(); i++) {
            Node node = attributes.item(i);
            if (node instanceof Attr) {
                Attr attr = (Attr) node;
                if (XML_NS_NS.equals(attr.getNamespaceURI())) {
                    // this is a namespace declaration, is it the one we are looking for?
                    if (attr.getLocalName().equals(prefix)) {
                        return attr.getValue();
                    }
                }
            }
        }

        // try parent
        if (element.getParentNode() instanceof Element) {
            return getNamespaceForPrefix(prefix, (Element) element.getParentNode());
        }

        // didn't find it - just use prefix as the namespace
        return prefix;
    }
}

Related

1. getAllNamespaceDeclarations(Element element)
2. getElementListNS(String namespace, Element element, String name)
3. getElementNS(String namespace, Element element, String name)
4. getNamespace(Element element)
5. getNamespaceDeclarationOrNull(String localName, Element element)
6. getNamespaceURI(Element element, String prefix)
7. getNamespaceUriDeclaration(Element ele)
8. getRequiredNamespaceDeclaration(String localName, Element element)
9. isAppropriateElement(final Node iNode, final String iNodeName, final String iNamespace)