public void doFilter()

in src/main/java/org/apache/sling/engine/impl/filter/AbstractSlingFilterChain.java [49:98]
36 lines of code
7 McCabe index (conditional complexity)

    public void doFilter(final ServletRequest request, final ServletResponse response)
            throws ServletException, IOException {

        final int filterIdx = ++this.current;
        final long start = System.nanoTime();

        if (filterIdx > this.filters.length) {
            // this happens when the whole filter chain has been executed, and a filter in that chain,
            // for some (bad) reason, calls doFilter yet another time.
            throw new IllegalStateException("doFilter should not be called more than once");
        }

        // the previous filter may have wrapped non-Sling request and response
        // wrappers (e.g. WebCastellum does this), so we have to make
        // sure the request and response are Sling types again
        SlingJakartaHttpServletRequest slingRequest = toSlingRequest(request);
        SlingJakartaHttpServletResponse slingResponse = toSlingResponse(response);

        try {

            if (this.current < this.filters.length) {

                // continue filtering with the next filter
                FilterHandle filter = this.filters[this.current];

                if (filter.select(slingRequest)) {
                    LOG.debug("{} got selected for this request", filter);
                    trackFilter(slingRequest, filter);
                    filter.getFilter().doFilter(slingRequest, slingResponse, this);
                } else {
                    LOG.debug("{} was not selected for this request", filter);
                    if (this.current == this.filters.length - 1) {
                        this.render(slingRequest, slingResponse);
                    } else {
                        doFilter(slingRequest, slingResponse);
                    }
                }
            } else {
                this.render(slingRequest, slingResponse);
            }

        } finally {
            if (filterIdx < times.length) {
                times[filterIdx] = (System.nanoTime() - start) / 1000;
                if (filterIdx == 0) {
                    consolidateFilterTimings(slingRequest);
                }
            }
        }
    }