protected void doUpdateCollection()

in src/main/java/org/apache/jackrabbit/ocm/manager/collectionconverter/impl/NTCollectionConverterImpl.java [140:203]
49 lines of code
12 McCabe index (conditional complexity)

    protected void doUpdateCollection(Session session,
                                      Node parentNode,
                                      CollectionDescriptor collectionDescriptor,
                                      ManageableObjects objects) throws RepositoryException {

        ClassDescriptor elementClassDescriptor = mapper.getClassDescriptorByClass(
                ReflectionUtils.forName(collectionDescriptor.getElementClassName()));

        if (objects == null || !elementClassDescriptor.hasIdField()) {
            this.deleteCollectionItems(session,
                                       parentNode,
                                       elementClassDescriptor.getJcrType());
        }

        if (objects == null) {
            return;
        }

        Iterator collectionIterator = objects.getIterator();
        Map updatedItems = new HashMap();
        while (collectionIterator.hasNext()) {
            Object item = collectionIterator.next();

            String elementJcrName = null;

            if (elementClassDescriptor.hasIdField()) {
                String idFieldName = elementClassDescriptor.getIdFieldDescriptor().getFieldName();
                elementJcrName = ReflectionUtils.getNestedProperty(item, idFieldName).toString();

                // Update existing JCR Nodes
                if (parentNode.hasNode(elementJcrName)) {
                    objectConverter.update(session, parentNode, elementJcrName, item);
                }
                else {
                    // Add new collection elements
                    objectConverter.insert(session, parentNode, elementJcrName, item);
                }

                updatedItems.put(elementJcrName, item);
            }
            else {
                elementJcrName = collectionDescriptor.getJcrElementName();
                if (elementJcrName == null) { // use PathFormat.checkFormat() here?
                    elementJcrName = COLLECTION_ELEMENT_NAME;
                }
                objectConverter.insert(session, parentNode, elementJcrName, item);
            }
        }

        // Delete JCR nodes that are not present in the collection
         NodeIterator nodes = this.getCollectionNodes(session, parentNode,
        		                                              elementClassDescriptor.getJcrType());
         if (nodes != null && elementClassDescriptor.hasIdField()) {


            while (nodes.hasNext()) {
                Node child = (Node) nodes.next();

                if (!updatedItems.containsKey(child.getName())) {
                    child.remove();
                }
            }
        }
    }