Collada XPath

package com.zybnet;

import java.util.Iterator;

import javax.xml.namespace.NamespaceContext;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.NodeList;

public class ColladaXPath {

    public static void main(String[] args) throws Exception {
        NodeList coords = (NodeList) xpath.evaluate("//c:triangles/c:p/text()",
                builder.parse(new URL("http://purple-works.com/yardstick/tablemaya.dae").openStream()),
                XPathConstants.NODESET);

        for (int i = 0; i < coords.getLength(); i++) {
            System.out.println(String.format("This <p> contains %d indices:" ,
                    coords.item(i).getNodeValue().split("\\s+").length));
        }

    }

    static XPath xpath;
    static DocumentBuilder builder;

    static {
        DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(true); // !IMPORTANT

        try {
            builder = domFactory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }

        xpath = XPathFactory.newInstance().newXPath();
        xpath.setNamespaceContext(new ColladaNamespaceCtx());
    }

    private static class ColladaNamespaceCtx implements NamespaceContext {
        @Override
        public String getNamespaceURI(String prefix) {
            return "http://www.collada.org/2005/11/COLLADASchema";
        }

        @Override
        public String getPrefix(String namespaceURI) {
            return "c";
        }

        @Override
        public Iterator<?> getPrefixes(String namespaceURI) {
            return null;
        }
    }
}