protected Optional doLoad()

in meecrowave-proxy/src/main/java/org/apache/meecrowave/proxy/servlet/service/ConfigurationLoader.java [112:144]
32 lines of code
10 McCabe index (conditional complexity)

    protected Optional<Routes> doLoad(final String content) {
        try (final Jsonb jsonb = JsonbBuilder.newBuilder()
                     .withProvider(loadJsonpProvider())
                     .withConfig(new JsonbConfig().setProperty("org.apache.johnzon.supports-comments", true))
                     .build()) {
            routes = jsonb.fromJson(content, Routes.class);
            final boolean hasRoutes = routes.routes != null && !routes.routes.isEmpty();
            if (routes.defaultRoute == null && !hasRoutes) {
                return Optional.empty();
            }
            if (hasRoutes) {
                // before merging, ensure all routes have an id to not duplicate default id
                routes.routes.stream().filter(it -> it.id == null).forEach(it -> it.id = newId());
            }
            if (routes.defaultRoute != null) {
                if (routes.defaultRoute.id == null) {
                    routes.defaultRoute.id = "default";
                }
                if (routes.routes == null) { // no route were defined, consider it is the default route, /!\ empty means no route, don't default
                    routes.routes = singletonList(routes.defaultRoute);
                }
                if (hasRoutes) {
                    final JsonBuilderFactory jsonFactory = Json.createBuilderFactory(emptyMap());
                    final JsonObject template = jsonb.fromJson(jsonb.toJson(routes.defaultRoute), JsonObject.class);
                    routes.routes = routes.routes.stream().map(r -> merge(jsonb, jsonFactory, template, r)).collect(toList());
                }
            }
        } catch (final Exception e) {
            throw new IllegalArgumentException(e);
        }
        routes.routes.forEach(this::init);
        return Optional.of(routes);
    }