package com.zetcode;

import javax.xml.stream.XMLInputFactory;

import javax.xml.stream.XMLStreamConstants;

import javax.xml.stream.XMLStreamException;

import java.io.FileInputStream;

import java.io.IOException;

import java.nio.charset.StandardCharsets;

// TODO add new nationality parameter to read

public class JavaStaxReadEx {

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

boolean bFirstName = false;

boolean bLastName = false;

boolean bOccupation = false;

var factory = XMLInputFactory.newInstance();

try(var fis = new FileInputStream("src/main/resources/users.xml")) {

var eventReader = factory.createXMLEventReader(fis, StandardCharsets.UTF_8.name());

while (eventReader.hasNext()) {

var event = eventReader.nextEvent();

switch (event.getEventType()) {

case XMLStreamConstants.START_ELEMENT:

var startElement = event.asStartElement();

var tagName = startElement.getName().getLocalPart();

System.out.println("tag: " + tagName);

if (tagName.equalsIgnoreCase("user")) {

System.out.println("Start Element : user");

var attributes = startElement.getAttributes();

var id = attributes.next().getValue();

System.out.println("Id: " + id);

} else if (tagName.equalsIgnoreCase("firstname")) {

bFirstName = true;

} else if (tagName.equalsIgnoreCase("lastname")) {

bLastName = true;

} else if (tagName.equalsIgnoreCase("occupation")) {

bOccupation = true;

}

break;

case XMLStreamConstants.CHARACTERS:

var characters = event.asCharacters();

if (bFirstName) {

System.out.println("First name: " + characters.getData());

bFirstName = false;

}

if (bLastName) {

System.out.println("Last name: " + characters.getData());

bLastName = false;

}

if (bOccupation) {

System.out.println("Occupation: " + characters.getData());

bOccupation = false;

}

break;

case XMLStreamConstants.END_ELEMENT:

var endElement = event.asEndElement();

if (endElement.getName().getLocalPart().equalsIgnoreCase("user")) {

System.out.println("End element : user");

System.out.println();

}

break;

}

}

eventReader.close();

}

}

}