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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.util.ArrayList;
import java.util.UUID;
public class PlayList {
private final String title;
private final UUID uuid;
private ArrayList<UUID> elementUUIDs;
public PlayList(String title, String id, ArrayList<UUID> elementUUIDs) {
this.title = title;
this.uuid = UUID.fromString(id);
this.elementUUIDs = elementUUIDs;
}
public PlayList(String title) {
this.title = title;
this.uuid = UUID.randomUUID();
this.elementUUIDs = new ArrayList<>();
}
public PlayList(Element xmlElement) {
{
this.title = xmlElement.getElementsByTagName("title").item(0).getTextContent();
String uuid = null;
try {
uuid = xmlElement.getElementsByTagName("UUID").item(0).getTextContent();
} catch (Exception ex) {
System.out.println("Empty playlist UUID, will create a new one");
}
if ((uuid == null) || (uuid.isEmpty()))
this.uuid = UUID.randomUUID();
else this.uuid = UUID.fromString(uuid);
//parse list of elements:
Node elementsElement = xmlElement.getElementsByTagName("elements").item(0);
NodeList elementUUIDNodes = elementsElement.getChildNodes();
if (elementUUIDNodes == null) return;
this.elementUUIDs = new ArrayList<>();
for (int i = 0; i < elementUUIDNodes.getLength(); i++) {
if (elementUUIDNodes.item(i).getNodeType() == Node.ELEMENT_NODE) {
Element elementElement = (Element) elementUUIDNodes.item(i);
if (elementElement.getNodeName().equals("UUID")) {
try {
this.addElement(UUID.fromString(elementElement.getTextContent()));
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
}
}
public void addElement(UUID element) {
elementUUIDs.add(element);
}
public ArrayList<UUID> getElements() {
return elementUUIDs;
}
public String getTitle() {
return title;
}
public void createXMLElement(Document document, Element parentElement) {
Element playlistElement = document.createElement("playlist");
parentElement.appendChild(playlistElement);
Element nameElement = document.createElement("title");
nameElement.appendChild(document.createTextNode(title));
playlistElement.appendChild(nameElement);
Element UUIDElement = document.createElement("UUID");
UUIDElement.appendChild(document.createTextNode(uuid.toString()));
playlistElement.appendChild(UUIDElement);
Element elementsElement = document.createElement("elements");
for (UUID currentUUID : this.elementUUIDs) {
Element elementUUIDElement = document.createElement("UUID");
elementUUIDElement.appendChild(document.createTextNode(currentUUID.toString()));
elementsElement.appendChild(elementUUIDElement);
}
playlistElement.appendChild(elementsElement);
}
}
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