public List<EntityHierarchyImpl> groupEntityHierarchies() {
while (!extendsQueue.isEmpty()) {
// set up a pass over the queue
int numberOfMappingsProcessed = 0;
Iterator<ExtendsQueueEntry> iterator = extendsQueue.iterator();
while (iterator.hasNext()) {
final ExtendsQueueEntry entry = iterator.next();
final SubclassEntityContainer container = subEntityContainerMap.get(entry.entityItExtends);
if (container != null) {
// we now have this entity's super, attach it and remove entry from extends queue
container.add(entry.subClassEntitySource);
iterator.remove();
numberOfMappingsProcessed++;
}
}
if (numberOfMappingsProcessed == 0) {
// todo : we could log the waiting dependencies...
throw currentMappingDocument
.getMappingLocalBindingContext()
.makeMappingException("Unable to process extends dependencies in hbm files");
}
}
return entityHierarchies;
}
private void processElements(
List<? extends SubEntityElement> subElements, SubclassEntityContainer container) {
for (final SubEntityElement subElement : subElements) {
final SubclassEntitySourceImpl subclassEntitySource =
createSubClassEntitySource(subElement, (EntitySource) container);
container.add(subclassEntitySource);
final String subEntityName = subclassEntitySource.getEntityName();
subEntityContainerMap.put(subEntityName, subclassEntitySource);
// Re-run the sub element to handle, as an example, subclasses
// within a subclass.
processSubElements(subElement, subclassEntitySource);
}
}
private void processSubclassElement(SubEntityElement element) {
// we have to see if this things super-type has been found yet, and if not add it to the
// extends queue
final String entityItExtends =
currentMappingDocument
.getMappingLocalBindingContext()
.qualifyClassName(element.getExtends());
final SubclassEntityContainer container = subEntityContainerMap.get(entityItExtends);
final SubclassEntitySourceImpl subClassEntitySource =
createSubClassEntitySource(element, (EntitySource) container);
final String entityName = subClassEntitySource.getEntityName();
subEntityContainerMap.put(entityName, subClassEntitySource);
processSubElements(element, subClassEntitySource);
if (container != null) {
// we already have this entity's super, attach it and continue
container.add(subClassEntitySource);
} else {
// we do not yet have the super and have to wait, so add it fto the extends queue
extendsQueue.add(new ExtendsQueueEntry(subClassEntitySource, entityItExtends));
}
}