[SOLVED] Sightly Implicit Objects

Sightly Implicit Objects

I am trying to implement my own version of WCM's navigation component, whose logic can be found here, subbing my own logic instead:

import java.util.*;
import com.day.cq.wcm.api.Page;
import com.day.cq.wcm.api.PageFilter;

import com.adobe.cq.sightly.WCMUsePojo;

public class Navigation extends WCMUsePojo{
    private Iterator<Page> items;

    @Override
    public void activate() throws Exception {
        Page navRootPage = getCurrentPage().getAbsoluteParent(2);
        items = navRootPage.listChildren(new PageFilter());
    }
    public Iterator<Page> getItems() {
        return items;
    }
}

The HTL, found here, is identical.

I am able to iterate over the first level (at depth 4) of the navigation items. But the loop breaks in item.html at this line: <sly data-sly-test="${item.children.size > 0}" data-sly-call="${groupTemplate.group @ items = item.children}"></sly>

Specifically, item.children does not appear to work even though these are implicit Sling objects. Any thoughts on why this is breaking?

Thanks in advance!

Solution

The Navigation model implemented in the Core WCM Components returns a list of NavigationItem which expose their children via a getChildren method. That allows you to call it from HTL/Sightly with item.children. Since your use-object returns a list of WCM Pages, you need to use the listChildren method. You can call it directly from HTL/Sightly using item.listChildren.

In general, for all objects, you can invoke a property getter using the standard JavaBeans conventions, see https://helpx.adobe.com/experience-manager/htl/using/use-api-java.html#Gettermethods. For a list of all objects available in AEM context in HTL/Sightly, see: https://helpx.adobe.com/experience-manager/htl/using/global-objects.html