private void deleteComponent(
final ComponentIdentifier id, final ComponentEventQueue ceq, final boolean deleteOrphans) {
final NCSComponent component = getComponent(id);
if (component == null) {
throw new WebApplicationException(Status.BAD_REQUEST);
}
final Set<NCSComponent> parentComponents = component.getParentComponents();
final Set<ComponentIdentifier> childrenIdentifiers =
getIdentifiers(component.getSubcomponents());
// first, we deal with orphans
if (deleteOrphans) {
for (final ComponentIdentifier subId : childrenIdentifiers) {
handleOrphanedComponents(component, subId, ceq, deleteOrphans);
}
}
// first, we remove this component from each of its parents
for (final NCSComponent parent : parentComponents) {
parent.getSubcomponents().remove(component);
m_componentDao.update(parent);
}
// then we delete this component
component.setSubcomponents(EMPTY_COMPONENT_SET);
m_componentDao.delete(component);
// and any events or alarms depending on it
deleteEvents(id.getForeignSource(), id.getForeignId());
deleteAlarms(id.getForeignSource(), id.getForeignId());
// alert that the component is deleted
ceq.componentDeleted(getIdentifier(component));
// then alert about the parents
sendUpdateEvents(ceq, getIdentifiers(parentComponents));
}
private void handleOrphanedComponents(
final NCSComponent parent,
final ComponentIdentifier child,
final ComponentEventQueue ceq,
final boolean deleteOrphans) {
final ComponentIdentifier parentId = getIdentifier(parent);
final NCSComponent childComponent = getComponent(child);
final Set<ComponentIdentifier> childChildren =
getIdentifiers(childComponent.getSubcomponents());
final Set<ComponentIdentifier> childParents =
getIdentifiers(childComponent.getParentComponents());
LogUtils.tracef(this, "handleOrphanedComponents: parent: %s", parentId);
LogUtils.tracef(this, "handleOrphanedComponents: child: %s", child);
LogUtils.tracef(this, "handleOrphanedComponents: child's children: %s", childChildren);
LogUtils.tracef(this, "handleOrphanedComponents: child's parents: %s", childParents);
if (childParents.size() == 1) {
final ComponentIdentifier childParent = childParents.iterator().next();
if (childParent.equals(parentId)) {
LogUtils.tracef(
this,
"handleOrphanedComponents: child (%s) has only one parent (%s) and it's being deleted.",
child,
childParent);
deleteComponent(child, ceq, deleteOrphans);
} else {
LogUtils.tracef(
this,
"handleOrphanedComponents: child (%s) has only one parent (%s) but it's not the one we expected. This is weird.",
child,
childParent);
ceq.componentUpdated(childParent);
}
} else {
LogUtils.tracef(
this,
"handleOrphanedComponents: child (%s) has more than one parent, sending updates for remaining parents.",
child);
for (final ComponentIdentifier childParent : childParents) {
ceq.componentUpdated(childParent);
}
}
}