public NewEventLinkTransformer() 
{
           
        this.defaultNamespaceURI = NAMESPACE_URI;
}

Also see:

java.lang.Object#Object()

 public  void endTransformingElement(String uri,
    String name,
    String raw) throws SAXException 
{
        String elementName = (String) this.stack.pop();
        this.contentHandler.endElement("", elementName, elementName);
}

 public  void startTransformingElement(String uri,
    String name,
    String raw,
    Attributes attributes) throws SAXException 
{
        if (!EVENT_ELEM.equals(name)) {
            throw new SAXException("Unknown element encountered: " + name);
        }
        String attributeName = attributes.getValue(ATTRIBUTE_ATTR);
        String elementName = attributes.getValue(ELEMENT_ATTR);
        if (attributeName == null) {
            throw new SAXException(
                "Element "
                    + EVENT_ELEM
                    + " must have an attribute "
                    + ATTRIBUTE_ATTR
                    + ".");
        }
        if (elementName == null) {
            throw new SAXException(
                "Element "
                    + EVENT_ELEM
                    + " must have an attribute "
                    + ELEMENT_ATTR
                    + ".");
        }
        // remove ATTRIBUTE_ATTR, "coplet" and ELEMENT_ATTR from attributes
        AttributesImpl newAttributes = this.getMutableAttributes(attributes);
        newAttributes.removeAttribute(ELEMENT_ATTR);
        newAttributes.removeAttribute(ATTRIBUTE_ATTR);
        newAttributes.removeAttribute("coplet");
        int index = newAttributes.getIndex(attributeName);
        String link = newAttributes.getValue(index);
        boolean formSpecialTreatment = false;
        if ("form".equals(elementName)) {
            //cut all query parameters from actions with method get, as these will be normaly ignored!
            formSpecialTreatment = true;
            if ("GET".equalsIgnoreCase(newAttributes.getValue("method"))
                && link.indexOf('?")  > 0) {
                link = link.substring(0, link.indexOf('?"));
            }
        }
        String portalAction = null;
        String portalEvent = null;
        // if attribute found that contains a link
        if (link != null) {
            CopletInstanceData cid = this.getCopletInstanceData(attributes.getValue("coplet"));
            // create event link
            CopletLinkEvent event = new CopletLinkEvent(cid, link);
            String eventLink = this.portalService.getComponentManager().getLinkService().getLinkURI(event);
            //form elements need hidden inputs to change request parameters
            if (formSpecialTreatment) {
                int pos = eventLink.indexOf("cocoon-portal-action=");
                if ( pos != -1 ) {
                    int begin = pos + "cocoon-portal-action=".length();
                    int end = eventLink.indexOf('&", begin);
                    if (end == -1) {
                        end = eventLink.length();
                    }
                    portalAction = eventLink.substring(begin, end);
                }
                pos = eventLink.indexOf("cocoon-portal-event=");
                if ( pos != -1 ) {
                    int begin = pos + "cocoon-portal-event=".length();
                    int end = eventLink.indexOf('&", begin);
                    if (end == -1) {
                        end = eventLink.length();
                    }
                    portalEvent = eventLink.substring(begin, end);
                }
                pos = eventLink.indexOf('?");
                if ( pos != -1 ) {
                    eventLink = eventLink.substring(0, pos);
                }
            }
            // insert event link
            newAttributes.setValue(index, eventLink);
        }
        this.stack.push(elementName);
        this.contentHandler.startElement(
            "",
            elementName,
            elementName,
            newAttributes);
        //generate hidden inputs to add request parameters to the form action
        if (formSpecialTreatment) {
            this.sendHiddenFields(this.contentHandler, portalAction, portalEvent);
        }
}