public Map<Long, Collection<CorrelationSetDAO>> getCorrelationSets(
Collection<ProcessInstanceDAO> instances) {
Map<Long, Collection<CorrelationSetDAO>> map =
new HashMap<Long, Collection<CorrelationSetDAO>>();
for (ProcessInstanceDAO instance : instances) {
Long id = instance.getInstanceId();
Collection<CorrelationSetDAO> existing = map.get(id);
if (existing == null) {
existing = new ArrayList<CorrelationSetDAO>();
map.put(id, existing);
}
existing.addAll(instance.getCorrelationSets());
}
return map;
}
