public Iterator listChildrenInternal()

in src/main/java/org/apache/sling/resourceresolver/impl/helper/ResourceResolverControl.java [311:370]
52 lines of code
13 McCabe index (conditional complexity)

    public Iterator<Resource> listChildrenInternal(final ResourceResolverContext context, 
        final Node<ResourceProviderHandler> node,
        final Resource parent,
        final Iterator<Resource> realChildren) {
        
        final Set<String> visitedNames = new HashSet<>();

        IteratorChain<Resource> chain = new IteratorChain<>();

        // synthetic and providers are done in one loop
        if (node != null) {
            final List<Resource> syntheticList = new ArrayList<>();
            final List<Resource> providerList = new ArrayList<>();

            for (final Entry<String, Node<ResourceProviderHandler>> entry : node.getChildren().entrySet()) {
                final String name = entry.getKey();
                final ResourceProviderHandler handler = entry.getValue().getValue();
                PathBuilder pathBuilder = new PathBuilder(parent.getPath());
                pathBuilder.append(name);
                final String childPath = pathBuilder.toString();
                if (handler == null) {
                    syntheticList.add(new SyntheticResource(context.getResourceResolver(), childPath, ResourceProvider.RESOURCE_TYPE_SYNTHETIC));
                } else {
                    Resource rsrc = null;
                    try {
                        final AuthenticatedResourceProvider rp = context.getProviderManager().getOrCreateProvider(handler, this);
                        rsrc = rp == null ? null : rp.getResource(childPath, parent, null);
                    } catch ( final LoginException ignore) {
                        // ignore
                    }
                    if ( rsrc != null ) {
                        providerList.add(rsrc);
                    } else {
                        // if there is a child provider underneath, we need to create a synthetic resource
                        // otherwise we need to make sure that no one else is providing this child
                        if ( !entry.getValue().getChildren().isEmpty() ) {
                            syntheticList.add(new SyntheticResource(context.getResourceResolver(), childPath, ResourceProvider.RESOURCE_TYPE_SYNTHETIC));
                        } else {
                            visitedNames.add(name);
                        }
                    }
                }
            }
            if ( !providerList.isEmpty() ) {
                chain.addIterator(providerList.iterator());
            }
            if ( realChildren != null ) {
                chain.addIterator(realChildren);
            }
            if ( !syntheticList.isEmpty() ) {
                chain.addIterator(syntheticList.iterator());
            }
        } else if ( realChildren != null ) {
            chain.addIterator(realChildren);
        }
        if ( chain.size() == 0 ) {
            return Collections.EMPTY_LIST.iterator();
        }
        return new UniqueResourceIterator(visitedNames, chain);
    }