Get Parent workitem on save precondition

Nice snippet found in jazz.net!!
 

public IWorkItemHandle findParent(AdvisableOperation operation) throws TeamRepositoryException {
Object data = operation.getOperationData();

if (data instanceof ISaveParameter) // from Workitem -> save operation
{
ISaveParameter saveParameter = (ISaveParameter) data;
IWorkItemReferences ref = saveParameter.getNewReferences();
List<IEndPointDescriptor> types = ref.getTypes();
for (IEndPointDescriptor desc : types)
{
if (desc.getId().equalsIgnoreCase("parent")) // "parent" is an RTC/Jazz string ID
{
List<IReference> refList = ref.getReferences(desc);

if (refList.size() > 0)
{
IReference iRef = refList.get(0); // Only one parent
Object obj = iRef.resolve();
if (obj instanceof IWorkItemHandle) // Only looking for Workitems.
{
return (IWorkItemHandle) obj;
}
else
return null;
}
else
return null;
}
}
}
return null;
} 

The WorkItemEndPoints are only a subset. 

Example for requirements: Use the WorkItemLinkTypes and the ILinkRegistry.

ILinkTypeRegistry.INSTANCE.getLinkType(WorkItemLinkTypes.IMPLEMENTS_REQUIREMENT).getTargetEndPointDescriptor()