Java version of the JCR node updating Groovy script I uploaded previously. This one does work, though.

gistfile1.java

import org.apache.jackrabbit.commons.JcrUtils;

import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.SimpleCredentials;
import javax.jcr.query.Query;
import javax.jcr.query.QueryManager;
import javax.jcr.query.QueryResult;

/**
 * @author Daniel Valencia (daniel@tacitknowledge.com)
 */
public class AssetUpdater
{
    public static void main(String[] args)
    {
        SessionManager sessionManager = new SessionManager("http://localhost:4502/crx/server");
        ResourceUpdater resourceUpdater = new ResourceUpdater(sessionManager.getSession());
        resourceUpdater.updateResource("foundation/components/image");
    }
}

class ResourceUpdater
{
    private Session session;
    private QueryManager queryManager;

    public ResourceUpdater(Session session)
    {
        this.session = session;
        try
        {
            this.queryManager = this.session.getWorkspace().getQueryManager();
        } catch (RepositoryException e)
        {
            throw new RuntimeException("Problem getting the workspace from the session " + session, e);
        }
    }

    public void updateResource(String resourceType)
    {
        System.out.println("Session is " + session);
        System.out.println("First finding resource with type: " + resourceType);
        updateResourcesWithType(resourceType);

        NodeIterator nodeIterator = null;
        try
        {
            nodeIterator = findNodesWithResourceType(resourceType);
            System.out.println("Node Iterator: $nodeIterator");
            System.out.println("nextNode: $nextNode");

            while (nodeIterator.hasNext())
            {
                System.out.println("There is a Node, haven't retrieved it yet!");
                Node theNode = nodeIterator.nextNode();
                System.out.println("There is a node! yay " + theNode.getPath());
            }

        } catch (RepositoryException e)
        {
            throw new RuntimeException("There was an issue searching for resources with resource type " + resourceType, e);
        }
    }

    public void updateResourcesWithType(String resourceType)
    {
        Node rootNode = null;
        try
        {
            rootNode = session.getRootNode();
            System.out.println("root node: " + rootNode.getPath());
        } catch (RepositoryException e)
        {
            throw new RuntimeException("Problem getting root node ", e);
        }
    }

    private NodeIterator findNodesWithResourceType(String resourceType) throws RepositoryException
    {
        Query query = buildQuery(resourceType);
        return executeQuery(query);
    }

    private Query buildQuery(String resourceType) throws RepositoryException
    {
        String expression = String.format("/jcr:root/content/audiusa-retail//element(*,nt:unstructured)[@sling:resourceType='%s']", resourceType);
        String language = "xpath";
        return queryManager.createQuery(expression, language);
    }

    private NodeIterator executeQuery(Query query) throws RepositoryException
    {
        QueryResult results = query.execute();
        return results.getNodes();
    }

}

class SessionManager
{
    private String url;

    public SessionManager(String url)
    {
        this.url = url;
        initializeJcrSession();
    }

    private Session session;

    public Session getSession()
    {
        return session;
    }

    private Repository repository;

    public Repository getRepository()
    {
        return repository;
    }

    private void initializeJcrSession()
    {
        SimpleCredentials creds = new SimpleCredentials("admin", "admin".toCharArray());
        try
        {
            repository = JcrUtils.getRepository(url);
            session = repository.login(creds, "crx.default");
        } catch (RepositoryException e)
        {
            e.printStackTrace();
        }
    }

}

gistfile2.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>AssetUpdater</groupId>
    <artifactId>AssetUpdater</artifactId>
    <version>1.0</version>

    <dependencies>
        <dependency>
            <groupId>javax.jcr</groupId>
            <artifactId>jcr</artifactId>
            <version>2.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.jackrabbit</groupId>
            <artifactId>jackrabbit-jcr2dav</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.5</version>
        </dependency>
    </dependencies>
    
</project>