@Override
public int doStartTag() throws JspException {
UIComponentTag tag = UIComponentTag.getParentUIComponentTag(pageContext);
if (tag == null) {
throw new JspException(
_LOG.getMessage("FILEDOWNLOADACTIONLISTENER_MUST_INSIDE_UICOMPONENT_TAG"));
}
// Only run on the first time the tag executes
if (!tag.getCreated()) return SKIP_BODY;
UIComponent component = tag.getComponentInstance();
if (!(component instanceof ActionSource)) {
throw new JspException(
_LOG.getMessage("FILEDOWNLOADACTIONLISTENER_MUST_INSIDE_UICOMPONENT_TAG"));
}
ELContextTag parentELContext = (ELContextTag) findAncestorWithClass(this, ELContextTag.class);
Application application = FacesContext.getCurrentInstance().getApplication();
FileDownloadActionListener listener = new FileDownloadActionListener();
if (_filename != null) {
listener.setValueExpression(FileDownloadActionListener.FILENAME_KEY, _filename);
}
if (_contentType != null) {
listener.setValueExpression(FileDownloadActionListener.CONTENT_TYPE_KEY, _contentType);
}
listener.setMethod(_method);
((ActionSource) component).addActionListener(listener);
return super.doStartTag();
}
