Album.java
package musichub.business;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
public class Album {
private final String title;
private final int lengthInSeconds;
private final UUID uuid;
private String artist;
private Date date;
private ArrayList<UUID> songsUIDs;
public Album(String title, String artist, int lengthInSeconds, String id, String date, ArrayList<UUID> songsUIDs) {
this.title = title;
this.artist = artist;
this.lengthInSeconds = lengthInSeconds;
this.uuid = UUID.fromString(id);
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
this.date = sdf.parse(date);
} catch (ParseException ex) {
ex.printStackTrace();
}
this.songsUIDs = songsUIDs;
}
public Album(String title, String artist, int lengthInSeconds, String date) {
this.title = title;
this.artist = artist;
this.lengthInSeconds = lengthInSeconds;
this.uuid = UUID.randomUUID();
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
this.date = sdf.parse(date);
} catch (ParseException ex) {
ex.printStackTrace();
}
this.songsUIDs = new ArrayList<>();
}
public Album(Element xmlElement) throws Exception {
{
this.title = xmlElement.getElementsByTagName("title").item(0).getTextContent();
this.lengthInSeconds = Integer.parseInt(xmlElement.getElementsByTagName("lengthInSeconds").item(0).getTextContent());
String uuid = null;
try {
uuid = xmlElement.getElementsByTagName("UUID").item(0).getTextContent();
} catch (Exception ex) {
System.out.println("Empty album UUID, will create a new one");
}
if ((uuid == null) || (uuid.isEmpty()))
this.uuid = UUID.randomUUID();
else this.uuid = UUID.fromString(uuid);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
this.date = sdf.parse(xmlElement.getElementsByTagName("date").item(0).getTextContent());
//parse list of songs:
Node songsElement = xmlElement.getElementsByTagName("songs").item(0);
NodeList songUUIDNodes = songsElement.getChildNodes();
if (songUUIDNodes == null) return;
this.songsUIDs = new ArrayList<>();
for (int i = 0; i < songUUIDNodes.getLength(); i++) {
if (songUUIDNodes.item(i).getNodeType() == Node.ELEMENT_NODE) {
Element songElement = (Element) songUUIDNodes.item(i);
if (songElement.getNodeName().equals("UUID")) {
try {
this.addSong(UUID.fromString(songElement.getTextContent()));
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
}
}
public void addSong(UUID song) {
songsUIDs.add(song);
}
public List<UUID> getSongs() {
return songsUIDs;
}
public ArrayList<UUID> getSongsRandomly() {
ArrayList<UUID> shuffledSongs = songsUIDs;
Collections.shuffle(shuffledSongs);
return shuffledSongs;
}
public String getTitle() {
return title;
}
public Date getDate() {
return date;
}
public void createXMLElement(Document document, Element parentElement) {
Element albumElement = document.createElement("album");
parentElement.appendChild(albumElement);
Element nameElement = document.createElement("title");
nameElement.appendChild(document.createTextNode(title));
albumElement.appendChild(nameElement);
Element artistElement = document.createElement("artist");
artistElement.appendChild(document.createTextNode(artist));
albumElement.appendChild(artistElement);
Element lengthElement = document.createElement("lengthInSeconds");
lengthElement.appendChild(document.createTextNode(Integer.valueOf(lengthInSeconds).toString()));
albumElement.appendChild(lengthElement);
Element UUIDElement = document.createElement("UUID");
UUIDElement.appendChild(document.createTextNode(uuid.toString()));
albumElement.appendChild(UUIDElement);
Element dateElement = document.createElement("date");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
dateElement.appendChild(document.createTextNode(sdf.format(date)));
albumElement.appendChild(dateElement);
Element songsElement = document.createElement("songs");
for (UUID currentUUID : this.songsUIDs) {
Element songUUIDElement = document.createElement("UUID");
songUUIDElement.appendChild(document.createTextNode(currentUUID.toString()));
songsElement.appendChild(songUUIDElement);
}
albumElement.appendChild(songsElement);
}
}