@Override
public Value link(DataHandler h, int tabId) {
if (fileName == null) {
this.tableId = tabId;
return this;
}
if (linked) {
ValueLob copy = ValueLob.copy(this);
copy.objectId = getNewObjectId(h);
copy.tableId = tabId;
String live = getFileName(h, copy.tableId, copy.objectId);
copyFileTo(h, fileName, live);
copy.fileName = live;
copy.linked = true;
return copy;
}
if (!linked) {
this.tableId = tabId;
String live = getFileName(h, tableId, objectId);
if (tempFile != null) {
tempFile.stopAutoDelete();
tempFile = null;
}
renameFile(h, fileName, live);
fileName = live;
linked = true;
}
return this;
}
@Override
public void unlink(DataHandler handler) {
if (linked && fileName != null) {
String temp;
// synchronize on the database, to avoid concurrent temp file
// creation / deletion / backup
synchronized (handler) {
temp = getFileName(handler, -1, objectId);
deleteFile(handler, temp);
renameFile(handler, fileName, temp);
tempFile = FileStore.open(handler, temp, "rw");
tempFile.autoDelete();
tempFile.closeSilently();
fileName = temp;
linked = false;
}
}
}