private void init()

in src/main/java/org/apache/geronimo/microprofile/impl/jwtauth/jwt/KidMapper.java [57:83]
27 lines of code
1 McCabe index (conditional complexity)

    private void init() {
        ofNullable(config.read("kids.key.mapping", null))
                .map(String::trim)
                .filter(s -> !s.isEmpty())
                .map(PropertiesLoader::load)
                .ifPresent(props -> props.stringPropertyNames()
                        .forEach(k -> keyMapping.put(k, loadKey(props.getProperty(k)))));
        ofNullable(config.read("kids.issuer.mapping", null))
                .map(String::trim)
                .filter(s -> !s.isEmpty())
                .map(PropertiesLoader::load)
                .ifPresent(props -> props.stringPropertyNames()
                        .forEach(k -> {
                            issuerMapping.put(k, Stream.of(props.getProperty(k).split(","))
                                                       .map(String::trim)
                                                       .filter(s -> !s.isEmpty())
                                                       .collect(Collectors.toSet()));
                        }));
        defaultIssuers = ofNullable(config.read("org.eclipse.microprofile.authentication.JWT.issuers", null))
                                .map(s -> Stream.of(s.split(","))
                                    .map(String::trim)
                                    .filter(it -> !it.isEmpty())
                                    .collect(Collectors.toSet()))
                                .orElseGet(HashSet::new);
        ofNullable(config.read("issuer.default", config.read(Names.ISSUER, null))).ifPresent(defaultIssuers::add);
        defaultKey = config.read("public-key.default", config.read(Names.VERIFIER_PUBLIC_KEY, null));
    }