content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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 com.alibaba.nacos.sys.utils;
  
  import org.springframework.beans.BeansException;
  import org.springframework.beans.factory.NoSuchBeanDefinitionException;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ApplicationContextInitializer;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.core.io.Resource;
  
  import java.io.IOException;
  import java.util.function.Consumer;
  
  /**
   * Nacos global tool class.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  @SuppressWarnings("all")
  public class ApplicationUtils implements ApplicationContextInitializer<ConfigurableApplicationContext> {
      
      private static ApplicationContext applicationContext;
      
      private static boolean started = false;
      
      public static boolean isStarted() {
          return started;
      }
      
      public static void setStarted(boolean started) {
          ApplicationUtils.started = started;
      }
      
      public static Object getBean(String name) throws BeansException {
          return applicationContext.getBean(name);
      }
      
      public static <T> T getBean(String name, Class<T> requiredType) throws BeansException {
          return applicationContext.getBean(name, requiredType);
      }
      
      public static Object getBean(String name, Object... args) throws BeansException {
          return applicationContext.getBean(name, args);
      }
      
      public static <T> T getBean(Class<T> requiredType) throws BeansException {
          return applicationContext.getBean(requiredType);
      }
      
      public static <T> void getBeanIfExist(Class<T> requiredType, Consumer<T> consumer) throws BeansException {
          try {
              T bean = applicationContext.getBean(requiredType);
              consumer.accept(bean);
          } catch (NoSuchBeanDefinitionException ignore) {
          }
      }
      
      public static <T> T getBean(Class<T> requiredType, Object... args) throws BeansException {
          return applicationContext.getBean(requiredType, args);
      }
      
      public static boolean containsBean(String name) {
          return applicationContext.containsBean(name);
      }
      
      public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
          return applicationContext.getType(name);
      }
      
      public static void publishEvent(Object event) {
          applicationContext.publishEvent(event);
      }
      
      public static Resource[] getResources(String locationPattern) throws IOException {
          return applicationContext.getResources(locationPattern);
      }
      
      public static Resource getResource(String location) {
          return applicationContext.getResource(location);
      }
      
      public static ClassLoader getClassLoader() {
          return applicationContext.getClassLoader();
      }
      
      public static ApplicationContext getApplicationContext() {
          return applicationContext;
      }
      
      public static void injectContext(ConfigurableApplicationContext context) {
          ApplicationUtils.applicationContext = context;
      }
      
      @Override
      public void initialize(ConfigurableApplicationContext context) {
          if (null == applicationContext) {
              // First time be called, set the context directly.
              applicationContext = context;
          } else if (context.getParent() == applicationContext) {
              // Not first time be called, which means sub context initialize, only store the first sub context.
              applicationContext = context;
          }
      }
  }
  