content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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 org.activiti.spring;
  
  import jakarta.el.ELResolver;
  import java.util.List;
  import org.activiti.core.el.CustomFunctionProvider;
  import org.activiti.engine.ProcessEngine;
  import org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl;
  import org.activiti.engine.impl.cfg.SpringBeanFactoryProxyMap;
  import org.springframework.beans.BeansException;
  import org.springframework.beans.factory.DisposableBean;
  import org.springframework.beans.factory.FactoryBean;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ApplicationContextAware;
  
  /**
  
  
  
  
  
   */
  public class ProcessEngineFactoryBean implements FactoryBean<ProcessEngine>, DisposableBean, ApplicationContextAware {
  
      protected ProcessEngineConfigurationImpl processEngineConfiguration;
  
      protected ApplicationContext applicationContext;
      protected ProcessEngine processEngine;
  
      public void destroy() throws Exception {
          if (processEngine != null) {
              processEngine.close();
          }
      }
  
      public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
          this.applicationContext = applicationContext;
      }
  
      public ProcessEngine getObject() throws Exception {
          configureExpressionManager();
          configureExternallyManagedTransactions();
  
          if (processEngineConfiguration.getBeans() == null) {
              processEngineConfiguration.setBeans(new SpringBeanFactoryProxyMap(applicationContext));
          }
  
          this.processEngine = processEngineConfiguration.buildProcessEngine();
          return this.processEngine;
      }
  
      protected void configureExpressionManager() {
          if (processEngineConfiguration.getExpressionManager() == null && applicationContext != null) {
              SpringExpressionManager expressionManager = new SpringExpressionManager(
                  applicationContext,
                  processEngineConfiguration.getBeans()
              );
              List<CustomFunctionProvider> customFunctionProviders =
                  processEngineConfiguration.getCustomFunctionProviders();
              List<ELResolver> customELResolvers = processEngineConfiguration.getCustomELResolvers();
              if (customFunctionProviders != null) {
                  expressionManager.setCustomFunctionProviders(customFunctionProviders);
              }
              if (customELResolvers != null) {
                  expressionManager.setCustomELResolvers(customELResolvers);
              }
              processEngineConfiguration.setExpressionManager(expressionManager);
          }
      }
  
      protected void configureExternallyManagedTransactions() {
          if (processEngineConfiguration instanceof SpringProcessEngineConfiguration) {
              // remark: any config can be injected, so we cannot have SpringConfiguration as member
              SpringProcessEngineConfiguration engineConfiguration =
                  (SpringProcessEngineConfiguration) processEngineConfiguration;
              if (engineConfiguration.getTransactionManager() != null) {
                  processEngineConfiguration.setTransactionsExternallyManaged(true);
              }
          }
      }
  
      public Class<ProcessEngine> getObjectType() {
          return ProcessEngine.class;
      }
  
      public boolean isSingleton() {
          return true;
      }
  
      public ProcessEngineConfigurationImpl getProcessEngineConfiguration() {
          return processEngineConfiguration;
      }
  
      public void setProcessEngineConfiguration(ProcessEngineConfigurationImpl processEngineConfiguration) {
          this.processEngineConfiguration = processEngineConfiguration;
      }
  }
  