public static List<TransitionTarget> getRelocateTargets(
long activityInstanceOid, TransitionOptions options, ScanDirection direction) {
IActivityInstance ai = ActivityInstanceBean.findByOID(activityInstanceOid);
IActivity activity = ai.getActivity();
if (!activity.getBooleanAttribute(PredefinedConstants.ACTIVITY_IS_RELOCATE_SOURCE_ATT)) {
// activity is not a relocation source
return Collections.emptyList();
}
Stack<TransitionStep> steps = new Stack();
List<TransitionTarget> targets = CollectionUtils.newList();
Set<TransitionTarget> visited = CollectionUtils.newSet();
switch (direction) {
case FORWARD:
addActivities(
visited,
targets,
ai,
options == null ? TransitionOptions.DEFAULT : options,
true,
steps);
break;
case BACKWARD:
addActivities(
visited,
targets,
ai,
options == null ? TransitionOptions.DEFAULT : options,
false,
steps);
break;
default:
addActivities(
visited,
targets,
ai,
options == null ? TransitionOptions.DEFAULT : options,
true,
steps);
addActivities(
visited,
targets,
ai,
options == null ? TransitionOptions.DEFAULT : options,
false,
steps);
}
return targets;
}
private static void addActivities(
Set<TransitionTarget> visited,
List<TransitionTarget> targets,
IActivityInstance ai,
TransitionOptions options,
boolean forward,
Stack<TransitionStep> steps) {
if (ai != null) {
steps.push(TransitionTargetFactory.createTransitionStep(ai));
// add activities from current process definition
addActivities(visited, targets, ai.getActivity(), options, forward, steps);
// step up into the calling process - starting activity cannot be a relocation target
if (options.isTransitionOutOfSubprocessesAllowed()) {
addActivities(
visited,
targets,
ai.getProcessInstance().getStartingActivityInstance(),
options,
forward,
steps);
}
steps.pop();
}
}