[Yanel-dev] Using xpath together with NamespaceContext

[Michael Wechner]

Hi

Maybe the following code is helpful for some of you when accessing an 
XML with namespace

Cheers

Michael

    /**
     *
     */
    public getTitle(Node node) throws Exception {
        Document doc = XMLHelper.readDocument(node.getInputStream());
        XPath xpath = XPathFactory.newInstance().newXPath();
        xpath.setNamespaceContext(new MyNamespaceContext());
        title = (String) xpath.evaluate("/foo:article/foo:title", doc, 
XPathConstants.STRING);;
    }

/**
 *
 */
class MyNamespaceContext implements javax.xml.namespace.NamespaceContext {

    /**
     *
     */
    public String getNamespaceURI(String prefix) {
        if (prefix == null) {
            throw new IllegalArgumentException("No prefix provided!");
        } else if (prefix.equals("foo")) {
            return "http://www.yanel.org/bar/1.0";
        } else {
            return javax.xml.XMLConstants.NULL_NS_URI;
        }
    }

    /**
     *
     */
    public String getPrefix(String namespaceURI) {
        // Not needed in this context.
        throw new UnsupportedOperationException();
    }

    /**
     *
     */
    public java.util.Iterator getPrefixes(String namespaceURI) {
        // Not needed in this context.
        throw new UnsupportedOperationException();
    }
}