public String undo(ValueEvent ve) {
List<ValueEvent> newer = eventDAO.getNewerEvents(ve);
Collections.sort(newer);
if (stillExists(newer)) {
Value v = valueDAO.findByID(new Value.ValueId(ve.getAttributeId(), ve.getTrialdataId()));
if (ve instanceof ValueCreateEvent) {
log.debug("Removing Value #0/#1", v.getId().getAttributeId(), v.getId().getTrialDataId());
valueDAO.remove(v);
} else {
log.debug(
"reversing value of #0/#1 to #2",
v.getId().getAttributeId(),
v.getId().getTrialDataId(),
ve.getOldValue());
v.setValueObject(ve.getOldValue());
}
} else {
if (!(ve instanceof ValueCreateEvent)) {
log.debug(
"restoring value #0/#1 with value #2",
ve.getAttributeId(),
ve.getTrialdataId(),
ve.getOldValue());
Attribute a = attributeDAO.findByID(ve.getAttributeId());
if (a == null)
throw new IllegalArgumentException(
"Could not restore value, attribute has been removed!");
Value v = valueFactory.getValueObject(a.getFormElement().getDataType());
v.setAttribute(a);
TrialData td = new TrialData();
td.setId(ve.getTrialdataId());
v.setTrialData(td);
v.setValueObject(ve.getOldValue());
valueDAO.persist(v);
}
}
// remove all newer Events
for (ValueEvent ve1 : newer) {
eventDAO.remove(ve1);
}
// reset datamodel
changes = null;
return null;
}
@Begin(join = true)
@Factory("changes")
public void getChanges() {
changes = eventDAO.findByTrialData(undoTDId);
Collections.sort(changes);
resolvedAttributeIds = new HashSet<Long>();
}