Groovy script for displaying hidden Oak content structures

oak-browse-tree.groovy

import org.apache.sling.jcr.api.SlingRepository
import javax.jcr.Session
import javax.jcr.Node
import javax.jcr.Property


SlingRepository repo = sling.getService(SlingRepository.class)
Session session = null
InputStream is = null
try {
    session = repo.loginAdministrative(null);
    
    // get oak ContentSession via reflection
    def obj1 = java.lang.reflect.Proxy.getInvocationHandler(session).delegatee;
    def field = obj1.class.superclass.getDeclaredField("sd");
    field.setAccessible(true);
    def obj2 = field.get(obj1);
    field = obj2.class.superclass.getDeclaredField("contentSession");
    field.setAccessible(true);
    def cs = field.get(obj2);
    
    out.println(cs.dump());
    
    def root = cs.latestRoot;
    
    // go wild here
    // Note: hidden nodes (prefixed with ":") do not appear in getChildren()
    // instead you have to know their path
    def t = root.getTree("/oak:index/nodetype/:index");
    out.println(t.exists());
    t.properties.each { kid ->
        out.println(kid);
    }
    out.println(t.getChildrenCount(1000));
    t.children.each { kid ->
        out.println(kid);
    }

    
} finally {
    is?.close()
    session?.logout()
}