Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.FileInputStream;
import java.util.Iterator;

import javax.xml.namespace.NamespaceContext;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Element;
import org.xml.sax.InputSource;

public class Main {
    public static void main(String[] args) throws Exception {
        XPathFactory xpf = XPathFactory.newInstance();
        XPath xp = xpf.newXPath();
        xp.setNamespaceContext(new MyNamespaceContext());
        XPathExpression xpe = xp.compile("ns:feed/ns:entry");
        FileInputStream xmlStream = new FileInputStream("input.xml");
        InputSource xmlInput = new InputSource(xmlStream);
        Element result = (Element) xpe.evaluate(xmlInput, XPathConstants.NODE);
        System.out.println(result);
    }
}

class MyNamespaceContext implements NamespaceContext {
    public String getNamespaceURI(String prefix) {
        if ("ns".equals(prefix)) {
            return "http://www.w3.org/2005/Atom";
        }
        return null;
    }

    public String getPrefix(String namespaceURI) {
        return null;
    }

    public Iterator getPrefixes(String namespaceURI) {
        return null;
    }
}