public ProcessingNode buildNode(Configuration config) throws Exception 
{
        // Get root node data
        this.node = new AggregateNode(
            VariableResolverFactory.getResolver(config.getAttribute("element"), this.manager),
            VariableResolverFactory.getResolver(config.getAttribute("ns", ""), this.manager),
            VariableResolverFactory.getResolver(config.getAttribute("prefix", ""), this.manager)
        );
        this.treeBuilder.setupNode(this.node, config);
        this.views = ((SitemapLanguage)this.treeBuilder).getViewsForStatement("", "", config);
        // Bug #7196 : ensure this.views is never null (see continuation of fix below)
        if (this.views == null) {
            this.views = new HashSet();
        }
        // The sitemap builder
        SitemapLanguage sitemap = (SitemapLanguage)this.treeBuilder;
        // All parts of the aggregate
        List allParts = new ArrayList();
        // For each view that a part matches, the list of all parts that match it
        Map viewParts = new HashMap();
        Configuration[] childConfigs = config.getChildren();
        for (int i = 0; i <  childConfigs.length; i++) {
            Configuration childConfig = childConfigs[i];
            if (!"part".equals(childConfig.getName())) {
                String msg = "Unknown element '" + childConfig.getName() + " in aggregate ' at " +
                    childConfig.getLocation();
                throw new ConfigurationException(msg);
            }
            checkNamespace(childConfig);
            AggregateNode.Part currentPart = new AggregateNode.Part(
                VariableResolverFactory.getResolver(childConfig.getAttribute("src"), this.manager),
                VariableResolverFactory.getResolver(childConfig.getAttribute("element", ""), this.manager),
                VariableResolverFactory.getResolver(childConfig.getAttribute("ns", ""), this.manager),
                VariableResolverFactory.getResolver(childConfig.getAttribute("prefix", ""), this.manager),
                VariableResolverFactory.getResolver(childConfig.getAttribute("strip-root", "false"), this.manager)
            );
            allParts.add(currentPart);
            // Get the views for this part
            Collection viewsForPart = sitemap.getViewsForStatement("", "", childConfig);
            // Associate this part to all the views it belongs to
            if (viewsForPart != null) {
                // Bug #7196 : add part view to aggregate views
                this.views.addAll(viewsForPart);
                Iterator iter = viewsForPart.iterator();
                while(iter.hasNext()) {
                    String currentView = (String)iter.next();
                    // Get collection of parts for current view
                    Collection currentViewParts = (Collection)viewParts.get(currentView);
                    if (currentViewParts == null) {
                        // None for now : create the collection
                        currentViewParts = new ArrayList();
                        viewParts.put(currentView, currentViewParts);
                    }
                    // Add the current part to the parts list of the view
                    currentViewParts.add(currentPart);
                }
            }
        }
        if (allParts.size() == 0) {
            String msg = "There must be at least one part in map:aggregate at " + config.getLocation();
            throw new ConfigurationException(msg);
        }
        // Now convert all Collections to Array for faster traversal
        AggregateNode.Part[] allPartsArray = (AggregateNode.Part[])allParts.toArray(
            new AggregateNode.Part[allParts.size()]);
        Iterator iter = viewParts.entrySet().iterator();
        while(iter.hasNext()) {
            Map.Entry entry = (Map.Entry)iter.next();
            // Get collection of parts for this entry
            Collection coll = (Collection)entry.getValue();
            // Convert to array and replace the entry value
            entry.setValue(
                coll.toArray(new AggregateNode.Part[coll.size()])
            );
        }
        node.setParts(allPartsArray, viewParts);
        return node;
}

 public  void linkNode() throws Exception 
{
        // Give the AggregateNode a Node for each view
        SitemapLanguage sitemap = (SitemapLanguage)this.treeBuilder;
        this.node.setViewNodes(sitemap.getViewNodes(this.views));
}