public Object execute()

in jaas/command/src/main/java/org/apache/karaf/jaas/command/ManageRealmCommand.java [57:149]
83 lines of code
31 McCabe index (conditional complexity)

    public Object execute() throws Exception {
        if (realmName == null && index <= 0) {
            System.err.println("A valid realm or the realm index need to be specified");
            return null;
        }
        JaasRealm oldRealm = (JaasRealm) this.session.get(JAAS_REALM);
        AppConfigurationEntry oldEntry = (AppConfigurationEntry) this.session.get(JAAS_ENTRY);

        if (oldRealm != null && !oldRealm.getName().equals(realmName) && !force) {
            System.err.println("Another JAAS Realm is being edited. Cancel/update first, or use the --force option.");
        } else if (oldEntry != null && !oldEntry.getLoginModuleName().equals(moduleName) && !force) {
            System.err.println("Another JAAS Login Module is being edited. Cancel/update first, or use the --force option.");
        } else {

            JaasRealm realm = null;
            AppConfigurationEntry entry = null;

            if (index > 0) {
                // user provided the index, get the realm AND entry from the index
                List<JaasRealm> realms = getRealms(hidden);
                if (realms != null && realms.size() > 0) {
                    int i = 1;
                    realms_loop: for (JaasRealm r : realms) {
                        AppConfigurationEntry[] entries = r.getEntries();

                        if (entries != null) {
                            for (AppConfigurationEntry entry1 : entries) {
                                if (i == index) {
                                    realm = r;
                                    entry = entry1;
                                    break realms_loop;
                                }
                                i++;
                            }
                        }
                    }
                }
            } else {
                List<JaasRealm> realms = getRealms(hidden);
                if (realms != null && realms.size() > 0) {
                    for (JaasRealm r : realms) {
                        if (r.getName().equals(realmName)) {
                            realm = r;
                            AppConfigurationEntry[] entries = realm.getEntries();
                            if (entries != null) {
                                for (AppConfigurationEntry e : entries) {
                                    String moduleClass = (String) e.getOptions().get(ProxyLoginModule.PROPERTY_MODULE);
                                    if (moduleName == null) {
                                        if (getBackingEngine(e) != null) {
                                            entry = e;
                                            break;
                                        }
                                    } else {
                                        if (moduleName.equals(e.getLoginModuleName()) || moduleName.equals(moduleClass)) {
	                                        if (getBackingEngine(e) != null) {
												entry = e;
												break;
											}
                                        }
                                    }
                                }
                                if (entry != null) {
                                    break;
                                }
                            }
                        }
                    }
                }
            }

            if (realm == null) {
                System.err.println("JAAS realm has not been found.");
                return null;
            }

            if (entry == null) {
                System.err.println("JAAS module has not been found.");
                return null;
            }

            Queue<JaasCommandSupport> commands = null;

            commands = (Queue<JaasCommandSupport>) this.session.get(JAAS_CMDS);
            if (commands == null) {
                commands = new LinkedList<>();
            }

            this.session.put(JAAS_REALM, realm);
            this.session.put(JAAS_ENTRY, entry);
            this.session.put(JAAS_CMDS, commands);
        }
        return null;
    }