content: package act.app;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.handler.builtin.controller.AfterInterceptor;
  import act.handler.builtin.controller.BeforeInterceptor;
  import act.handler.builtin.controller.ExceptionInterceptor;
  import act.handler.builtin.controller.FinallyInterceptor;
  import act.handler.builtin.controller.RequestHandlerProxy.GroupAfterInterceptor;
  import act.handler.builtin.controller.RequestHandlerProxy.GroupExceptionInterceptor;
  import act.handler.builtin.controller.RequestHandlerProxy.GroupFinallyInterceptor;
  import act.handler.builtin.controller.RequestHandlerProxy.GroupInterceptorWithResult;
  import org.osgl.mvc.result.Result;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import static act.handler.builtin.controller.RequestHandlerProxy.insertInterceptor;
  
  /**
   * Manage interceptors at App level
   */
  public class AppInterceptorManager extends AppServiceBase<AppInterceptorManager> {
      private final List<BeforeInterceptor> beforeInterceptors = new ArrayList<>();
      private final List<AfterInterceptor> afterInterceptors = new ArrayList<>();
      private final List<ExceptionInterceptor> exceptionInterceptors = new ArrayList<>();
      private final List<FinallyInterceptor> finallyInterceptors = new ArrayList<>();
  
      final GroupInterceptorWithResult BEFORE_INTERCEPTOR = new GroupInterceptorWithResult(beforeInterceptors);
      final GroupAfterInterceptor AFTER_INTERCEPTOR = new GroupAfterInterceptor(afterInterceptors);
      final GroupFinallyInterceptor FINALLY_INTERCEPTOR = new GroupFinallyInterceptor(finallyInterceptors);
      final GroupExceptionInterceptor EXCEPTION_INTERCEPTOR = new GroupExceptionInterceptor(exceptionInterceptors);
  
      AppInterceptorManager(App app) {
          super(app);
      }
  
      public Result handleBefore(ActionContext actionContext) throws Exception {
          return BEFORE_INTERCEPTOR.apply(actionContext);
      }
  
      public Result handleAfter(Result result, ActionContext actionContext) throws Exception {
          return AFTER_INTERCEPTOR.apply(result, actionContext);
      }
  
      public void handleFinally(ActionContext actionContext) throws Exception {
          FINALLY_INTERCEPTOR.apply(actionContext);
      }
  
  
      public Result handleException(Exception ex, ActionContext actionContext) throws Exception {
          return EXCEPTION_INTERCEPTOR.apply(ex, actionContext);
      }
  
      public void registerInterceptor(BeforeInterceptor interceptor) {
          insertInterceptor(beforeInterceptors, interceptor);
      }
  
      public void registerInterceptor(AfterInterceptor interceptor) {
          insertInterceptor(afterInterceptors, interceptor);
      }
  
      public void registerInterceptor(FinallyInterceptor interceptor) {
          insertInterceptor(finallyInterceptors, interceptor);
      }
  
      public void registerInterceptor(ExceptionInterceptor interceptor) {
          insertInterceptor(exceptionInterceptors, interceptor);
          Collections.sort(exceptionInterceptors);
      }
  
      @Override
      protected void releaseResources() {
          beforeInterceptors.clear();
          afterInterceptors.clear();
          exceptionInterceptors.clear();
          finallyInterceptors.clear();
      }
  }
  