public String apply()

in plugins/rest/src/main/java/org/apache/struts2/rest/DefaultHttpHeaders.java [93:148]
50 lines of code
23 McCabe index (conditional complexity)

    public String apply(HttpServletRequest request, HttpServletResponse response, Object target) {

        if (disableCaching) {
            response.setHeader("Cache-Control", "no-cache");
        }
        if (lastModified != null) {
            response.setDateHeader("Last-Modified", lastModified.getTime());
        }
        if (etag == null && !noETag && target != null) {
            etag = String.valueOf(target.hashCode());
        }
        if (etag != null) {
            response.setHeader("ETag", etag.toString());
        }

        if (locationId != null) {
            String url = request.getRequestURL().toString();
            int lastSlash = url.lastIndexOf("/");
            int lastDot = url.lastIndexOf(".");
            if (lastDot > lastSlash && lastDot > -1) {
                url = url.substring(0, lastDot) + "/" + locationId + url.substring(lastDot);
            } else {
                url += "/" + locationId;
            }
            response.setHeader("Location", url);
            status = SC_CREATED;
        } else if (location != null) {
            response.setHeader("Location", location);
            status = SC_CREATED;
        }

        if (status == SC_OK && !disableCaching) {
            boolean etagNotChanged = false;
            boolean lastModifiedNotChanged = false;
            String reqETag = request.getHeader("If-None-Match");
            if (etag != null) {
                if (etag.equals(reqETag)) {
                    etagNotChanged = true;
                }
            }

            String headerIfModifiedSince = request.getHeader("If-Modified-Since");
            if (lastModified != null && headerIfModifiedSince != null) {
                lastModifiedNotChanged = compareIfModifiedSince(headerIfModifiedSince);
            }

            if ((etagNotChanged && lastModifiedNotChanged) ||
                    (etagNotChanged && headerIfModifiedSince == null) ||
                    (lastModifiedNotChanged && reqETag == null)) {
                status = SC_NOT_MODIFIED;
            }
        }

        response.setStatus(status);
        return resultCode;
    }