@Before
public void setup() {
for (int customerId = 1; customerId <= 5; customerId++) {
ProcessInstance pi =
sf.getWorkflowService()
.startProcess(new QName(MODEL_NAME2, "OrderCreation").toString(), null, true);
List<ActivityInstance> w = getWorklist();
Assert.assertEquals("worklist", 1, w.size());
ActivityInstance ai = w.get(0);
Assert.assertEquals("process instance", pi.getOID(), ai.getProcessInstanceOID());
Assert.assertEquals("activity instance", "EnterOrderData", ai.getActivity().getId());
Map<String, Object> order = CollectionUtils.newMap();
order.put("date", new Date());
order.put("customerId", customerId);
ai =
complete(
ai, PredefinedConstants.DEFAULT_CONTEXT, Collections.singletonMap("Order", order));
try {
ProcessInstanceStateBarrier.instance().await(pi.getOID(), ProcessInstanceState.Completed);
} catch (Exception e) {
}
w = getWorklist();
}
}
/**
* Create business object instances via API (not via process instances) and validate if they're
* created and if a business object query for a given primary key returns the corresponding BO.
*/
@Test
public void CreateCustomersCheck() {
DeployedModelDescription model =
sf.getQueryService().getModels(DeployedModelQuery.findActiveForId(MODEL_NAME2)).get(0);
for (int i = 1; i <= 3; i++) {
createCustomer(model, i);
}
String businessObjectQualifiedId = new QName(model.getId(), "Customer").toString();
BusinessObjectQuery query =
BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
BusinessObject bo = bos.get(0);
List<BusinessObject.Value> values = bo.getValues();
Assert.assertEquals("Values", 3, values.size());
query = BusinessObjectQuery.findWithPrimaryKey(businessObjectQualifiedId, 2);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "firstName", "Danny2");
}
private static List<IActivity> getEndActivities(IProcessDefinition process) {
List<IActivity> activities = CollectionUtils.newList();
for (IActivity activity : process.getActivities()) {
if (activity.getOutTransitions().isEmpty()) {
activities.add(activity);
}
}
return activities;
}
/**
* Create some instances for a given BO and validate if they can be queried:
*
* <ul>
* <li>where the qualified business object id is set
* <li>the primary key is passed to findForBusinessObject()
* <li>the qualified business object id is passed to findForBusinessObject and the primary key
* is set as a data filter
* <li>the qualified business object id is passed to findForBusinessObject and an attribute of
* the BO is set as a data filter
* </ul>
*/
@Test
public void CheckFiltering() throws Exception {
DeployedModelDescription model =
sf.getQueryService().getModels(DeployedModelQuery.findActiveForId(MODEL_NAME3)).get(0);
String businessObjectQualifiedId = new QName(model.getId(), "Fund").toString();
for (int i = 1; i <= 9; i++) {
final Map<String, Object> fund = CollectionUtils.newMap();
fund.put("AccountNumber", "100100" + i);
fund.put("AccountName", "Fund" + i);
sf.getWorkflowService()
.createBusinessObjectInstance(businessObjectQualifiedId, (Serializable) fund);
}
BusinessObjectQuery query =
BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
BusinessObject bo = bos.get(0);
List<BusinessObject.Value> values = bo.getValues();
Assert.assertEquals("Values", 9, values.size());
query = BusinessObjectQuery.findWithPrimaryKey(businessObjectQualifiedId, "1001003");
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "AccountNumber", "1001003");
query = BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.where(DataFilter.isEqual("Fund", "AccountNumber", "1001005"));
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "AccountNumber", "1001005");
query = BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.where(DataFilter.isEqual("Fund", "AccountName", "Fund7"));
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "AccountName", "Fund7");
}
/**
* Test if the business object query returns all business object instances for a given business
* object id. The BO instances was created by the OrderCreation process resp. EnterOrderData
* activity in the setup() method.
*/
@Test
public void CheckOrders() {
DeployedModelDescription model =
sf.getQueryService().getModels(DeployedModelQuery.findActiveForId(MODEL_NAME2)).get(0);
BusinessObjectQuery query =
BusinessObjectQuery.findForBusinessObject(new QName(model.getId(), "Order").toString());
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
BusinessObject bo = bos.get(0);
List<BusinessObject.Value> values = bo.getValues();
Assert.assertTrue("Expected at least 5 values: " + values.size(), 5 <= values.size());
checkValue(values, false, "customerId", 1, 2, 3, 4, 5);
}
/**
* Validate if BusinessObjectQuery returns business objects which are defined in the models
* MODEL_NAME2 and MODEL_NAME3. Note: If BusinessObjectsList is executed standalone than
* bos.size() == expected.size(). But if it is executed after CheckFiltering2 then bos.size() >
* expected.size() because CheckFiltering2 deployes MODEL_NAME3 as a new version. This means that
* bos.size() == expected.size()+2 in this case.
*/
@Test
public void BusinessObjectsList() {
BusinessObjectQuery query = BusinessObjectQuery.findAll();
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_DESCRIPTION));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(query);
List<String> expected =
CollectionUtils.newArrayListFromElements(
Arrays.asList(
new QName(MODEL_NAME2, "Account").toString(),
new QName(MODEL_NAME2, "Customer").toString(),
new QName(MODEL_NAME2, "Order").toString(),
new QName(MODEL_NAME2, "Fund").toString(),
new QName(MODEL_NAME2, "FundGroup").toString(),
new QName(MODEL_NAME3, "Employee").toString(),
new QName(MODEL_NAME3, "Fund").toString()));
List<String> removedEntries = CollectionUtils.newArrayList(expected.size());
for (BusinessObject bo : bos) {
String qualifiedBOId = new QName(bo.getModelId(), bo.getId()).toString();
if (expected.remove(qualifiedBOId)) {
removedEntries.add(qualifiedBOId);
} else {
Assert.assertTrue(
"Not expected entry: " + qualifiedBOId, removedEntries.contains(qualifiedBOId));
}
}
Assert.assertTrue("Missing business objects: " + expected, expected.isEmpty());
}
/**
* Validate if BO instances can be created once only with the same primary key and that they can
* be queried either via findWithPrimaryKey() or with help of data filters.
*/
@Test
public void CreateOrdersCheck() {
DeployedModelDescription model =
sf.getQueryService().getModels(DeployedModelQuery.findActiveForId(MODEL_NAME2)).get(0);
createOrder(model, 666);
try {
createOrder(model, 666);
Assert.fail("Extected BPMRT03825 error message");
} catch (ObjectExistsException ex) {
Assert.assertEquals("Error code", "BPMRT03825", ex.getError().getId());
}
String businessObjectQualifiedId = new QName(model.getId(), "Order").toString();
BusinessObjectQuery query =
BusinessObjectQuery.findWithPrimaryKey(businessObjectQualifiedId, 666);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
BusinessObject bo = bos.get(0);
List<Value> values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "customerId", 666);
query = BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query
.getFilter()
.addOrTerm()
.or(DataFilter.isEqual("Order", "customerId", 2))
.or(DataFilter.isEqual("Order", "customerId", 4));
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 2, values.size());
checkValue(values, true, "customerId", 2, 4);
}
private static void addActivity(
Set<TransitionTarget> visited,
List<TransitionTarget> targets,
IActivity target,
TransitionOptions options,
boolean forward,
Stack<TransitionStep> steps) {
TransitionTarget candidate =
TransitionTargetFactory.createTransitionTarget(target, steps, forward);
if (!visited.add(candidate)) {
// target already visited, stop processing
return;
}
if (target.getBooleanAttribute(PredefinedConstants.ACTIVITY_IS_RELOCATE_TARGET_ATT)) {
// found a relocation target, check filters
String processIdPattern = options.getProcessIdPattern();
if (processIdPattern == null
|| target.getProcessDefinition().getId().matches(processIdPattern)) {
String activityIdPattern = options.getActivityIdPattern();
if (activityIdPattern == null || target.getId().matches(activityIdPattern)) {
targets.add(candidate);
}
}
}
if (options.isTransitionIntoSubprocessesAllowed()
&& target.getImplementationType() == ImplementationType.SubProcess
&& target.getSubProcessMode() != SubProcessModeKey.ASYNC_SEPARATE) {
IProcessDefinition process = target.getImplementationProcessDefinition();
if (process != null) {
steps.push(TransitionTargetFactory.createTransitionStep(target));
addActivities(visited, targets, process, options, forward, steps);
steps.pop();
}
}
addActivities(visited, targets, target, options, forward, steps);
}
/**
* The following test case should ensure that
*
* <ul>
* <li>Any modifications to an attribute of a BOI via API isn't reflected to process data which
* are using the BO
* <li>Any modifications to an attribute of a BOI via the process data is only reflected to the
* BOI which is attached to the synthetic process instance and that it doesn't affect other
* BOIs which are used in other processes
* </ul>
*/
@Test
public void checkFilteringOnBusinessObjectAttrChange() {
// setup
final int customerIdOffset = 100;
final int customerCount = 3;
for (int customerId = 1; customerId <= customerCount; customerId++) {
ProcessInstance pi =
sf.getWorkflowService()
.startProcess(new QName(MODEL_NAME2, "DistributedOrder").toString(), null, true);
List<ActivityInstance> w = getWorklist(pi);
Assert.assertEquals("worklist", 1, w.size());
ActivityInstance ai = w.get(0);
Assert.assertEquals("activity instance", "CreateOrder", ai.getActivity().getId());
Map<String, Object> order = CollectionUtils.newMap();
order.put("date", new Date());
order.put("customerId", customerIdOffset + customerId);
order.put("items", "item " + customerId);
ai =
complete(
ai, PredefinedConstants.DEFAULT_CONTEXT, Collections.singletonMap("Order", order));
try {
ActivityInstanceStateBarrier.instance().await(ai.getOID(), ActivityInstanceState.Completed);
} catch (Exception e) {
}
}
// after DistributeCreation activity is completed we have the following state:
// * 2 asynchronous subprocesses are started: one which copies the data and the
// other one which doesn't
// * 3 synchronous subprocesses are triggered: one with shared data, one with separate
// but copied data and the last one with separate data without copying
// This results into the following state:
// * Each process has created four business object instances
// * One which is attached to a synthetic process instance
// * 3 other BOIs which are attached to a real process instance
String businessObjectQualifiedId = new QName(MODEL_NAME2, "Order").toString();
BusinessObjectQuery businessObjectQuery =
BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
businessObjectQuery
.getFilter()
.addAndTerm()
.add(DataFilter.greaterThan("Order", "customerId", customerIdOffset));
businessObjectQuery.setPolicy(
new BusinessObjectQuery.Policy(
BusinessObjectQuery.Option.WITH_VALUES, BusinessObjectQuery.Option.WITH_DESCRIPTION));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(businessObjectQuery);
Assert.assertEquals("Only one business object, namely Order, is expected", 1, bos.getSize());
Assert.assertEquals(
"Business object instances count isn't the same as started process ergo the count of the synthetic process instances",
customerCount,
getTotalSize(bos));
// Wait that all ShowOrder processes are started (unfortunately we cannot use
// ProcessInstanceStateBarrier here
// because of the async processes.
ProcessInstanceQuery piQuery = ProcessInstanceQuery.findAlive("ShowOrder");
boolean waitForPIs = true;
while (waitForPIs) {
long instanceCount = sf.getQueryService().getProcessInstancesCount(piQuery);
waitForPIs = instanceCount != (customerCount * 5);
if (waitForPIs) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
}
}
BusinessObject bo = bos.get(0);
BusinessObject.Value customer101 = null;
for (BusinessObject.Value boValue : bo.getValues()) {
Map<?, ?> boAttr = (Map<?, ?>) boValue.getValue();
Integer customerId = (Integer) boAttr.get("customerId");
if (Integer.valueOf(customerIdOffset + 1).equals(customerId)) {
customer101 = boValue;
}
}
Assert.assertNotNull("Customer " + customerIdOffset + 1 + " not found", customer101);
// Update BOI via API...
((Map) customer101.getValue()).put("items", "newitems");
sf.getWorkflowService()
.updateBusinessObjectInstance(businessObjectQualifiedId, customer101.getValue());
// ...and validate if no process data is modified
piQuery = ProcessInstanceQuery.findActive();
FilterTerm filter = piQuery.getFilter().addAndTerm();
filter.add(
DataFilter.between(
"Order", "customerId", customerIdOffset, customerIdOffset + customerCount));
filter.add(DataFilter.like("Order", "items", "item%"));
filter.addAndTerm().add(ProcessInstanceHierarchyFilter.ROOT_PROCESS);
piQuery.setPolicy(SubsetPolicy.UNRESTRICTED);
ProcessInstances rootPIs = sf.getQueryService().getAllProcessInstances(piQuery);
// Root process instances are the DistributedOrder processes and the ShowOrder processes which
// was started
// as async processes and which had copied the data
Assert.assertEquals(
"Changes in BOIs must not be reflected in process instance data",
customerCount * 2,
rootPIs.getTotalCount());
// Update BOI for a given process via data path...
long piOid = rootPIs.get(0).getOID();
((Map) customer101.getValue()).put("items", "newitems1");
sf.getWorkflowService().setOutDataPath(piOid, "OrderDataPath", (Map) customer101.getValue());
// ...and validate if the BOI is updated...
businessObjectQuery =
BusinessObjectQuery.findWithPrimaryKey(
businessObjectQualifiedId, ((Map) customer101.getValue()).get("customerId"));
businessObjectQuery.setPolicy(
new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(businessObjectQuery);
Assert.assertEquals("Only one business object, namely Order, is expected", 1, bos.getSize());
List<BusinessObject.Value> boValues = bos.get(0).getValues();
Assert.assertEquals(1, boValues.size());
Assert.assertEquals("newitems1", ((Map) boValues.get(0).getValue()).get("items"));
// ...but the other process instance data should be untouched
piQuery = ProcessInstanceQuery.findActive();
filter = piQuery.getFilter().addAndTerm();
filter.add(
DataFilter.between(
"Order", "customerId", customerIdOffset, customerIdOffset + customerCount));
filter.add(DataFilter.like("Order", "items", "item%"));
filter.addAndTerm().add(ProcessInstanceHierarchyFilter.ROOT_PROCESS);
piQuery.setPolicy(SubsetPolicy.UNRESTRICTED);
rootPIs = sf.getQueryService().getAllProcessInstances(piQuery);
Assert.assertEquals(
"Changes in BOIs must not be reflected in process instance data",
(customerCount * 2) - 1,
rootPIs.getTotalCount());
}
/**
* Create some instances for a given BO and validate if they can be queried where:
*
* <ul>
* <li>the qualified business object id is set
* <li>the primary key is passed to findForBusinessObject()
* <li>the qualified business object id is passed to findForBusinessObject and an attribute of
* the BO is set as a data filter
* <li>the qualified business object id is passed to findForBusinessObject and the query is
* restricted to the currently active model
* <li>the qualified business object id is passed to findForBusinessObject and across all
* deployed model versions
* <li>the qualified business object id is passed to findForBusinessObject and the query is
* restricted to a given modelOid
* </ul>
*/
@Test
public void CheckFiltering2() throws Exception {
DeployedModelDescription model =
sf.getQueryService().getModels(DeployedModelQuery.findActiveForId(MODEL_NAME3)).get(0);
String businessObjectQualifiedId = new QName(model.getId(), "Employee").toString();
createEmployee(businessObjectQualifiedId, "1", "Florin");
createEmployee(businessObjectQualifiedId, "Sid", "2");
BusinessObjectQuery query =
BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
BusinessObjects bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
BusinessObject bo = bos.get(0);
List<BusinessObject.Value> values = bo.getValues();
Assert.assertEquals("Values", 2, values.size());
query = BusinessObjectQuery.findWithPrimaryKey(businessObjectQualifiedId, "1");
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "EmpID", "1");
query = BusinessObjectQuery.findWithPrimaryKey(businessObjectQualifiedId, "Sid");
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "EmpID", "Sid");
query = BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.where(DataFilter.isEqual("Employee", "EmpName", "2"));
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "EmpName", "2");
query = BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.where(DataFilter.isEqual("Employee", "EmpName", "Florin"));
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
checkValue(values, true, "EmpName", "Florin");
RtEnvHome.deployModel(sf.getAdministrationService(), null, MODEL_NAME3);
createEmployee(businessObjectQualifiedId, "3", "Meyer");
query =
BusinessObjectQuery.findForBusinessObject(
PredefinedConstants.ACTIVE_MODEL, businessObjectQualifiedId);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 1, values.size());
query = BusinessObjectQuery.findForBusinessObject(businessObjectQualifiedId);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 2, bos.getSize());
Assert.assertEquals("Values", 3, getTotalSize(bos));
query =
BusinessObjectQuery.findForBusinessObject(model.getModelOID(), businessObjectQualifiedId);
query.setPolicy(new BusinessObjectQuery.Policy(BusinessObjectQuery.Option.WITH_VALUES));
bos = sf.getQueryService().getAllBusinessObjects(query);
Assert.assertEquals("Objects", 1, bos.getSize());
bo = bos.get(0);
values = bo.getValues();
Assert.assertEquals("Values", 2, values.size());
}
private static IActivity consume(
IActivity startActivity,
LinkedList<ITransition> unconsumed,
HashSet<ITransition> visited,
boolean forward,
boolean supportsLoops) {
int unchanged = 0;
while (!unconsumed.isEmpty()) {
ITransition transition = unconsumed.element();
IActivity target = forward ? transition.getToActivity() : transition.getFromActivity();
if (startActivity == target) {
// unsupported loop
break;
}
JoinSplitType inJsType = forward ? target.getJoinType() : target.getSplitType();
if (JoinSplitType.And == inJsType) {
List<ITransition> pending = CollectionUtils.newList();
ModelElementList<ITransition> transitions =
forward ? target.getInTransitions() : target.getOutTransitions();
for (ITransition incoming : transitions) {
if (unconsumed.remove(incoming)) {
pending.add(incoming);
}
}
if (pending.size() == transitions.size()) // all incoming transitions consumed
{
if (unconsumed.isEmpty()) {
return target;
}
} else {
if (!unconsumed
.isEmpty()) // unable to consume all transitions, but there are more branches, put
// them all back to the end
{
unconsumed.addAll(pending);
unchanged++;
}
if (unchanged == unconsumed.size()) {
return null;
}
continue;
}
} else {
unconsumed.remove(transition);
}
unchanged = 0;
ModelElementList<ITransition> transitions =
forward ? target.getOutTransitions() : target.getInTransitions();
if (transitions.isEmpty()) {
return null;
}
JoinSplitType outJsType = forward ? target.getSplitType() : target.getJoinType();
if (JoinSplitType.Xor == outJsType && transitions.size() > 1) {
return consumeXor(startActivity, unconsumed, visited, forward, supportsLoops, transitions);
} else {
for (ITransition out : transitions) {
if (visited.contains(out)) // loop
{
if (!supportsLoops) {
return null;
}
} else {
visited.add(out);
unconsumed.add(out);
}
}
}
}
return null;
}