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MovieDomParser.java
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MovieDomParser.java
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import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class MovieDomParser {
private List<Movie> movies = new ArrayList<>();
private Document dom;
private Connection conn;
public MovieDomParser() throws SQLException, ClassNotFoundException {
init();
}
public void init() throws SQLException, ClassNotFoundException {
Class.forName("com.mysql.cj.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/moviedb?autoReconnect=true&useSSL=false",
"mytestuser", "My6$Password");
}
public void runExample() {
try {
parseXmlFile();
parseDocument();
printData();
insertMovies();
insertGenresInMovies();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (conn != null) conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
private void parseXmlFile() {
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
dom = dBuilder.parse("mains243.xml");
} catch (ParserConfigurationException | SAXException | IOException e) {
e.printStackTrace();
}
}
private void parseDocument() {
Element docElement = dom.getDocumentElement();
NodeList nodeList = docElement.getElementsByTagName("film");
for (int i = 0; i < nodeList.getLength(); i++) {
Element element = (Element) nodeList.item(i);
Movie movie = parseMovie(element);
movies.add(movie);
}
}
private Movie parseMovie(Element element) {
//genreId for matching to genres_in_movies
int genreId;
String id = getTextValue(element, "fid");
String title = getTextValue(element, "t");
int year = getIntValue(element, "year");
String director = getTextValue(element, "dirn");
String genre = getTextValue(element, "cat");
if(genre == null)
{
genreId = 0;
}
else
{
switch (genre) {
case "Susp":
genreId = 21;
break;
case "CnR":
genreId = 7;
break;
case "Dram":
genreId = 9;
break;
case "West":
genreId = 23;
break;
case "Myst":
genreId = 16;
break;
case "S.F.":
genreId = 19;
break;
case "Advt":
genreId = 3;
break;
case "Horr":
genreId = 13;
break;
case "Comd":
genreId = 6;
break;
case "Musc":
genreId = 15;
break;
case "Docu":
genreId = 8;
break;
case "Porn":
genreId = 2;
break;
case "Noir":
genreId = 24;
break;
case "BioP":
genreId = 26;
break;
default:
genreId = 25;
break;
}
}
return new Movie(id, title, year, director, genre, genreId);
}
private String getTextValue(Element elem, String tagName) {
NodeList nl = elem.getElementsByTagName(tagName);
if (nl != null && nl.getLength() > 0) {
Element el = (Element) nl.item(0);
Node node = el.getFirstChild();
if (node != null) {
return node.getNodeValue();
}
}
return null;
}
private int getIntValue(Element elem, String tagName) {
try {
return Integer.parseInt(getTextValue(elem, tagName));
} catch (NumberFormatException e) {
e.printStackTrace();
return -1;
}
}
private void printData() {
System.out.println("Total parsed " + movies.size() + " movies");
for (Movie movie : movies) {
System.out.println(movie);
}
}
private void insertMovies() throws SQLException {
conn.setAutoCommit(false);
String callSQL = "{CALL InsertMovie(?, ?, ?, ?)}";
try (CallableStatement cstmt = conn.prepareCall(callSQL)) {
int count = 0;
for (Movie movie : movies) {
cstmt.setString(1, movie.getId());
cstmt.setString(2, movie.getTitle());
cstmt.setInt(3, movie.getYear());
cstmt.setString(4, movie.getDirector());
cstmt.addBatch();
count++;
if (count % 1000 == 0 || count == movies.size()) {
cstmt.executeBatch();
conn.commit();
}
}
}
}
private void insertGenresInMovies() throws SQLException {
conn.setAutoCommit(false);
String callSQL = "{CALL InsertGenreInMovie(?, ?)}";
try (CallableStatement cstmt = conn.prepareCall(callSQL)) {
int count = 0;
for (Movie movie : movies) {
cstmt.setInt(1, movie.getGenreId());
cstmt.setString(2, movie.getId());
cstmt.addBatch();
count++;
if (count % 1000 == 0 || count == movies.size()) {
cstmt.executeBatch();
conn.commit();
}
}
}
}
public static void main(String[] args) {
try {
MovieDomParser domParser = new MovieDomParser();
domParser.runExample();
} catch (SQLException | ClassNotFoundException e) {
e.printStackTrace();
}
}
}