A custom Sling Transformer for Adobe CQ 5 (AEM) that converts long URLs to short URLs

LinkShortnerTransformer.java

public class LinkShortnerTransformer extends AbstractSAXPipe implements Transformer {

    private static final Logger log = LoggerFactory.getLogger(SitesmartRewriterTransformer.class);

    private SlingHttpServletRequest httpRequest;

    private static final String ATT_NAME = "href";
    private static final String EL_NAME = "a";

    public SitesmartRewriterTransformer() {
    }

    public void dispose() {
        this.httpRequest = null;
    }

    public void init(ProcessingContext context, ProcessingComponentConfiguration config) throws IOException {
        this.httpRequest = context.getRequest();
        log.info("Transforming request {}.", httpRequest.getRequestURI());
    }

    @Override
    public void startElement(String nsUri, String localname, String qName, Attributes attrs) throws SAXException {
        /* copy the element attributes */
        AttributesImpl linkAttrs = new AttributesImpl(attrs);

        /* Only interested in EL_NAME elements */
        if (EL_NAME.equalsIgnoreCase(localname)) {

            /* iterate through the attributes of the element and act only on ATT_NAME attributes */
            for (int i = 0; i < linkAttrs.getLength(); i++) {
                if (ATT_NAME.equalsIgnoreCase(linkAttrs.getLocalName(i))) {
                    String pathInLink = linkAttrs.getValue(i);
                    log.info("Path in link: {}", pathInLink);


                    /* use the resource resolver of the http request to reverse-resolve the path  */
                    String mappedPath = httpRequest.getResourceResolver().map(httpRequest, pathInLink);

                    log.info("Transformed {} to {}.", pathInLink, mappedPath);

                    /* update the attribute value */
                    linkAttrs.setValue(i, mappedPath);
                }
            }
        }

        /* return updated attributes to super and continue with the transformer chain */
        super.startElement(nsUri, localname, qName, linkAttrs);
    }
}

Hi..
Can you Please share the SitesmartRewriterTransformer file also.