package com.zetcode;

import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.xpath.XPathConstants;

import javax.xml.xpath.XPathExpressionException;

import javax.xml.xpath.XPathFactory;

import java.io.IOException;

public class JavaXPathSimpleEx {

// XPath syntax: https://devhints.io/xpath

/* TODO

get second user

get all users

get id attribute of last user

*/

public static void main(String[] args) throws ParserConfigurationException, IOException,

SAXException, XPathExpressionException {

var factory = DocumentBuilderFactory.newInstance();

factory.setNamespaceAware(true); // required

var builder = factory.newDocumentBuilder();

var doc = builder.parse("src/main/resources/users.xml");

var xPathFactory = XPathFactory.newInstance();

var xpath = xPathFactory.newXPath();

var expr = xpath.compile("/users/user[1]/firstname/text()");

var firstName = expr.evaluate(doc, XPathConstants.STRING);

expr = xpath.compile("/users/user[1]/lastname/text()");

var lastName = expr.evaluate(doc, XPathConstants.STRING);

System.out.printf("The first user is %s %s%n", firstName, lastName);

}

}