StripesRequestWrapper.java 文件源码

/**
 * Looks for the StripesRequesetWrapper for the specific request and returns it. This is done
 * by checking to see if the request is a StripesRequestWrapper, and if not, successively
 * unwrapping the request until the StripesRequestWrapper is found.
 *
 * @param request the ServletRequest that is wrapped by a StripesRequestWrapper
 * @return the StripesRequestWrapper that is wrapping the supplied request
 * @throws IllegalStateException if the request is not wrapped by Stripes
 */
public static StripesRequestWrapper findStripesWrapper(ServletRequest request) {
    // Loop through any request wrappers looking for the stripes one
    while ( !(request instanceof StripesRequestWrapper)
            && request != null
            && request instanceof HttpServletRequestWrapper) {
        request = ((HttpServletRequestWrapper) request).getRequest();
    }

    // If we have our wrapper after the loop exits, we're good; otherwise...
    if (request instanceof StripesRequestWrapper) {
        return (StripesRequestWrapper) request;
    }

    else {
        throw new IllegalStateException(String.format("Request %s made it through to some part of Stripes " +
            "without being wrapped in a StripesRequestWrapper. The StripesFilter is " +
            "responsible for wrapping the request, so it is likely that either the " +
            "StripesFilter is not deployed, or that its mappings do not include the " +
            "DispatcherServlet _and_ *.jsp. Stripes does not require that the Stripes " +
            "wrapper is the only request wrapper, or the outermost; only that it is present.",((HttpServletRequest)request).getRequestURL().toString()));
    }
}