if (nodeList.item(i).getNodeName().equals("Song")) {
Song song = new Song();
song.readObject(nodeList.item(i), zip);
this.addItem(song);
} else if (nodeList.item(i).getNodeName().equals("TextServiceItem")) {
TextServiceItem tsi = new TextServiceItem();
tsi.readObject(nodeList.item(i), zip);
this.addItem(tsi);
} else if (nodeList.item(i).getNodeName().equals("ContentlessServiceItem")) {
ContentlessServiceItem csi = new ContentlessServiceItem();
csi.readObject(nodeList.item(i), zip);
this.addItem(csi);