public void login()

in src/main/java/org/apache/sling/auth/core/impl/SlingAuthenticator.java [510:562]
44 lines of code
14 McCabe index (conditional complexity)

    public void login(HttpServletRequest request, HttpServletResponse response) {

        // ensure the response is not committed yet
        if (response.isCommitted()) {
            throw new IllegalStateException("Response already committed");
        }

        // select path used for authentication handler selection
        final Collection<AbstractAuthenticationHandlerHolder>[] holdersArray = this.authHandlersManager
                .findApplicableHolders(request);
        final String path = getHandlerSelectionPath(request);
        boolean done = false;
        for (int m = 0; !done && m < holdersArray.length; m++) {
            final Collection<AbstractAuthenticationHandlerHolder> holderList = holdersArray[m];
            if ( holderList != null ) {
                for (AbstractAuthenticationHandlerHolder holder : holderList) {
                    if (holder.isPathRequiresHandler(path)) {
                        log.debug("login: requesting authentication using handler: {}",
                            holder);

                        try {
                            done = holder.requestCredentials(request, response);
                        } catch (IOException ioe) {
                            log.error(
                                "login: Failed sending authentication request through handler "
                                    + holder + ", access forbidden", ioe);
                            done = true;
                        }
                        if (done) {
                            break;
                        }
                    }
                }
            }
        }

        // fall back to HTTP Basic handler (if not done already)
        if (!done && httpBasicHandler != null) {
            done = httpBasicHandler.requestCredentials(request, response);
        }

        // no handler could send an authentication request, throw
        if (!done) {
            int size = 0;
            for (int m = 0; m < holdersArray.length; m++) {
                if (holdersArray[m] != null) {
                    size += holdersArray[m].size();
                }
            }
            log.info("login: No handler for request ({} handlers available)", size);
            throw new NoAuthenticationHandlerException();
        }
    }