public static List constructInterceptorReference(InterceptorLocator interceptorLocator,
    String refName,
    Map refParams,
    Location location,
    ObjectFactory objectFactory) throws ConfigurationException 
{
                                          
        Object referencedConfig = interceptorLocator.getInterceptorConfig(refName);
        List< InterceptorMapping > result = new ArrayList< InterceptorMapping >();
        if (referencedConfig == null) {
            throw new ConfigurationException("Unable to find interceptor class referenced by ref-name " + refName, location);
        } else {
            if (referencedConfig instanceof InterceptorConfig) {
                InterceptorConfig config = (InterceptorConfig) referencedConfig;
                Interceptor inter = null;
                try {
                    inter = objectFactory.buildInterceptor(config, refParams);
                    result.add(new InterceptorMapping(refName, inter));
                } catch (ConfigurationException ex) {
                    LOG.warn("Unable to load config class "+config.getClassName()+" at "+
                            ex.getLocation()+" probably due to a missing jar, which might "+
                            "be fine if you never plan to use the "+config.getName()+" interceptor");
                    LOG.error("Actual exception", ex);
                }
            } else if (referencedConfig instanceof InterceptorStackConfig) {
                InterceptorStackConfig stackConfig = (InterceptorStackConfig) referencedConfig;
                if ((refParams != null) && (refParams.size()  > 0)) {
                    result = constructParameterizedInterceptorReferences(interceptorLocator, stackConfig, refParams, objectFactory);
                } else {
                    result.addAll(stackConfig.getInterceptors());
                }
            } else {
                LOG.error("Got unexpected type for interceptor " + refName + ". Got " + referencedConfig);
            }
        }
        return result;
}

Builds a list of interceptors referenced by the refName in the supplied PackageConfig.