// Simple API for XML only allows you to read from an XML

// file. SAX doesn't require you to read the document into memory

import org.xml.sax.*;

// Used to read an XML file into memory where the doc is

// stored as a bunch of objects. You can write back to the file

import org.w3c.dom.*;

// Used to gather XML elements into DOM objects

import javax.xml.parsers.*;

public class JavaLesson44{

public static void main(String[] args){

// Creates a DOM object in memory. Now you can access

// data in the xml file

Document xmlDoc = getDocument("./src/tvshow5.xml");

// Get the name of the root element

xmlDoc.getDocumentElement();

System.out.println("Root element is " +

xmlDoc.getDocumentElement().getNodeName());

// The nodelist contains all of the nodes in the xml file

NodeList listOfShows = xmlDoc.getElementsByTagName("show");

// Get the number of children in the root element

System.out.println("Number of shows " + listOfShows.getLength());

// The element you want to print out

String elementName = "network";

// The attribute to search for

String attrName = "country";

// Send the NodeList for processing

getElementAndAttrib(listOfShows, elementName, attrName);

// Additional Code not in the Video -------------------

// Returns an Element object represented by the root element

// of the xml file

Element theRoot = xmlDoc.getDocumentElement();

// Get the first child or show element in this situation

Element showElement = (Element)theRoot.getFirstChild();

// Object that will contain all of the show data

tvShow tvs;

// Cycle through all of the show elements until the end

while(showElement != null){

// Go get the first element in show which is name

tvs = getShowData(showElement);

// Print out the value of showName

System.out.println(tvs.showName);

// Get the next show

showElement = (Element)showElement.getNextSibling();

}

}

// Reads an XML file into a DOM document

private static Document getDocument(String docString) {

try {

// API used to convert XML into a DOM object tree

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

// Ignore all of the comments

factory.setIgnoringComments(true);

// Ignore white space in elements

factory.setIgnoringElementContentWhitespace(true);

// Validate the XML as it is parsed

factory.setValidating(true);

// Provides access to the documents data

DocumentBuilder builder = factory.newDocumentBuilder();

// Takes the document

return builder.parse(new InputSource(docString));

}

catch(Exception ex){

System.out.println(ex.getMessage());

}

return null;

}

private static tvShow getShowData(Element ele){

// Returns the first child element in the xml file.

// That element is name

Element nameElement = (Element)ele.getFirstChild();

// Save the value in this element as a String

String showName = getTextValue(nameElement).trim();

// Create a tvShow object that holds the values stored

// in the show elements

return new tvShow(showName);

}

private static String getTextValue(Node theNode) {

// Get the value of the first child element

return theNode.getFirstChild().getNodeValue();

}

private static void getElementAndAttrib(NodeList listOfShows, String elementName, String attrName){

try{

// Cycle through the number of shows

for(int i=0; i < listOfShows.getLength(); i++){

// Get the first show node

Node showNode = listOfShows.item(i);

// Convert into an element to gain access to element methods

Element showElement = (Element)showNode;

// Create a list of nodes that have the name defined in elementName

NodeList networkList = showElement.getElementsByTagName(elementName);

// Get the first and only element in this situation

Element networkElement = (Element)networkList.item(0);

// Returns a list of node elements

// Each value is in a node in side of the network node

// That's why you have to get the child nodes for network

NodeList elementList = networkElement.getChildNodes();

// Check if the element has the attribute set

if(networkElement.hasAttribute(attrName)){

System.out.println(elementName + " : " + ((Node)elementList.item(0)).getNodeValue().trim() +

" has attribute " + networkElement.getAttribute(attrName));

} else {

System.out.println(((Node)elementList.item(0)).getNodeValue().trim());

}

}

}

catch(Exception ex){

System.out.println(ex.getMessage());

}

}

private static class tvShow{

public String showName, showNetwork;

public tvShow(String showName){

this.showName = showName;

}

}

}