private void executeServiceRegistrations()

in src/main/java/org/apache/sling/serviceusermapping/impl/ServiceUserMapperImpl.java [405:458]
43 lines of code
11 McCabe index (conditional complexity)

    private void executeServiceRegistrations(final RegistrationSet registrationSet) {

        final ServiceRegistration reg = defaultRegistration.getAndSet(null);
        if (reg != null) {
            reg.unregister();
        }

        for (final Registration registration : registrationSet.removed) {

            ServiceRegistration serviceRegistration = registration.setService(null);

            if (serviceRegistration != null) {
                try {
                    serviceRegistration.unregister();
                    log.debug("Unregistered ServiceUserMapped {}", registration.mapping);
                } catch (final IllegalStateException e) {
                    // this can happen on shutdown, therefore we just ignore it and don't log
                }
            }
        }

        for (final Registration registration : registrationSet.added) {
            Mapping mapping = registration.mapping;
            final Dictionary<String, Object> properties = new Hashtable<>();
            if (mapping.getSubServiceName() != null) {
                properties.put(ServiceUserMapped.SUBSERVICENAME, mapping.getSubServiceName());
            }

            properties.put(Mapping.SERVICENAME, mapping.getServiceName());
            final ServiceRegistration serviceRegistration = bundleContext.registerService(
                    ServiceUserMappedImpl.SERVICEUSERMAPPED,
                    ServiceUserMappedImpl.SINGLETON, properties);

            ServiceRegistration oldServiceRegistration = registration.setService(serviceRegistration);
            log.debug("Activated ServiceUserMapped {}", registration.mapping);

            if (oldServiceRegistration != null) {
                try {
                    oldServiceRegistration.unregister();
                } catch (final IllegalStateException e) {
                    // this can happen on shutdown, therefore we just ignore it and don't log
                }
            }
        }

        if (this.useDefaultMapping || defaultUser != null) {
            Dictionary<String, Object> properties = new Hashtable<>();
            properties.put(Mapping.SERVICENAME, getServiceName(bundleContext.getBundle()));
            final ServiceRegistration serviceRegistration = bundleContext
                    .registerService(ServiceUserMappedImpl.SERVICEUSERMAPPED,
                ServiceUserMappedImpl.SINGLETON, properties);
            this.defaultRegistration.set(serviceRegistration);
        }
    }