Java XML Node Text Value getNamespaceURIFromPrefix(Node context, String prefix)

Description

Given a prefix and a node, return the namespace URI that the prefix has been associated with.

License

Apache License

Parameter

Parameter	Description
context	the starting node (looks up recursively from here)
prefix	the prefix to find an xmlns:prefix=uri for

Return

the namespace URI or null if not found

Declaration

public static String getNamespaceURIFromPrefix(Node context, String prefix) 

Method Source Code

//package com.java2s;
/*// ww w .  j  a va2s. com
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights 
 * reserved.
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 * Redistribution and use in source and binary forms, with or without
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The names "SOAP" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
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 * originally based on software copyright (c) 2000, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import org.w3c.dom.*;

public class Main {
    /**
     * The namespaceURI represented by the prefix <code>xmlns</code>.
     */
    private static String NS_URI_XMLNS = "http://www.w3.org/2000/xmlns/";

    /**
     * Given a prefix and a node, return the namespace URI that the prefix
     * has been associated with. This method is useful in resolving the
     * namespace URI of attribute values which are being interpreted as
     * QNames.
     *
     * @param context the starting node (looks up recursively from here)
     * @param prefix the prefix to find an xmlns:prefix=uri for
     *
     * @return the namespace URI or null if not found
     */
    public static String getNamespaceURIFromPrefix(Node context, String prefix) {
        short nodeType = context.getNodeType();
        Node tempNode = null;

        switch (nodeType) {
        case Node.ATTRIBUTE_NODE: {
            tempNode = ((Attr) context).getOwnerElement();
            break;
        }
        case Node.ELEMENT_NODE: {
            tempNode = context;
            break;
        }
        default: {
            tempNode = context.getParentNode();
            break;
        }
        }

        while (tempNode != null && tempNode.getNodeType() == Node.ELEMENT_NODE) {
            Element tempEl = (Element) tempNode;
            String namespaceURI = tempEl.getAttributeNS(NS_URI_XMLNS, prefix);

            if (namespaceURI != null) {
                return namespaceURI;
            } else {
                tempNode = tempEl.getParentNode();
            }
        }

        return null;
    }
}

Related

1. getFirstExtensionNodeFromWorkingSet(Node extensionsNode, String workingSetName)
2. getFirstLevelTextContent(Node node)
3. getFirstSubElementsInnerText(Node element, String subElementName)
4. getInnerXmlText(Node xmlNode)
5. getNamedItemText(NamedNodeMap map, String name)
6. getNamespaceURIFromPrefix(Node context, String prefix)
7. getNodeText(final Node node)
8. getNodeText(Node node)
9. getNodeText(Node node)