# AndroidAPIUtils.java

    /*
     * Copyright (c) 2017, WSO2 Inc. (http:www.wso2.org) All Rights Reserved.
     *
     * WSO2 Inc. licenses this file to you under the Apache License,
     * Version 2.0 (the "License"); you may not use this file except
     * in compliance with the License.
     * You may obtain a copy of the License at
     *
     * http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing,
     * software distributed under the License is distributed on an
     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     * KIND, either express or implied.  See the License for the
     * specific language governing permissions and limitations
     * under the License.
     */

    package org.wso2.carbon.mdm.services.android.util;

    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.wso2.carbon.analytics.api.AnalyticsDataAPI;
    import org.wso2.carbon.context.PrivilegedCarbonContext;
    import org.wso2.carbon.device.mgt.analytics.data.publisher.service.EventsPublisherService;
    import org.wso2.carbon.device.mgt.common.notification.mgt.NotificationManagementService;
    import org.wso2.carbon.device.mgt.core.app.mgt.ApplicationManagementProviderService;
    import org.wso2.carbon.device.mgt.core.device.details.mgt.DeviceInformationManager;
    import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
    import org.wso2.carbon.policy.mgt.core.PolicyManagerService;

    /**
     * AndroidAPIUtil class provides utility functions used by Android REST-API classes.
     */
    public class AndroidAPIUtils {

        private static Log log = LogFactory.getLog(AndroidAPIUtils.class);

        private AndroidAPIUtils(){
            throw new IllegalStateException("Utility class");
        }

        public static String getAuthenticatedUser() {
            PrivilegedCarbonContext threadLocalCarbonContext = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            String username = threadLocalCarbonContext.getUsername();
            String tenantDomain = threadLocalCarbonContext.getTenantDomain();
            if (username != null && username.endsWith(tenantDomain)) {
                return username.substring(0, username.lastIndexOf("@"));
            }
            return username;
        }

        public static DeviceManagementProviderService getDeviceManagementService() {
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            DeviceManagementProviderService deviceManagementProviderService =
                    (DeviceManagementProviderService) ctx.getOSGiService(DeviceManagementProviderService.class, null);
            if (deviceManagementProviderService == null) {
                String msg = "Device Management service has not initialized.";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return deviceManagementProviderService;
        }

        public static DeviceInformationManager getDeviceInformationManagerService() {
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            DeviceInformationManager informationManager =
                    (DeviceInformationManager) ctx.getOSGiService(DeviceInformationManager.class, null);
            if (informationManager == null) {
                String msg = "Information Manager service not initialized.";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return informationManager;
        }

        public static PolicyManagerService getPolicyManagerService() {
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            PolicyManagerService policyManagerService = (PolicyManagerService) ctx.getOSGiService(
                    PolicyManagerService.class, null);
            if (policyManagerService == null) {
                String msg = "Policy Manager service has not initialized";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return policyManagerService;
        }

        public static ApplicationManagementProviderService getApplicationManagerService() {
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            ApplicationManagementProviderService applicationManagementProviderService =
                    (ApplicationManagementProviderService) ctx.getOSGiService(ApplicationManagementProviderService.class, null);
            if (applicationManagementProviderService == null) {
                String msg = "Application Management provider service has not initialized";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return applicationManagementProviderService;
        }

        public static NotificationManagementService getNotificationManagementService() {
            NotificationManagementService notificationManagementService;
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            notificationManagementService = (NotificationManagementService) ctx.getOSGiService(
                    NotificationManagementService.class, null);
            if (notificationManagementService == null) {
                String msg = "Notification Management service not initialized.";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return notificationManagementService;
        }

        public static EventsPublisherService getEventPublisherService() {
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            EventsPublisherService eventsPublisherService =
                    (EventsPublisherService) ctx.getOSGiService(EventsPublisherService.class, null);
            if (eventsPublisherService == null) {
                String msg = "Event Publisher service has not initialized.";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return eventsPublisherService;
        }

        public static AnalyticsDataAPI getAnalyticsDataAPI() {
            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
            AnalyticsDataAPI analyticsDataAPI =
                    (AnalyticsDataAPI) ctx.getOSGiService(AnalyticsDataAPI.class, null);
            if (analyticsDataAPI == null) {
                String msg = "Analytics api service has not initialized.";
                log.error(msg);
                throw new IllegalStateException(msg);
            }
            return analyticsDataAPI;
        }

    }