content: package act.event.meta;
  
  /*-
   * #%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.Act;
  import act.app.App;
  import act.app.event.SysEventId;
  import act.inject.DependencyInjector;
  import org.osgl.$;
  import org.osgl.inject.BeanSpec;
  import org.osgl.util.*;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Method;
  import java.lang.reflect.Type;
  import java.util.ArrayList;
  import java.util.List;
  
  public class SimpleEventListenerMetaInfo {
      private List<Object> events;
      private List<$.Func0> delayedEvents;
      private String className;
      private String methodName;
      private String asyncMethodName;
      private List<BeanSpec> paramTypes;
      private boolean async;
      private boolean isStatic;
      private boolean beforeAppStart;
  
      public SimpleEventListenerMetaInfo(
              final List<Object> events,
              final List<$.Func0> delayedEvents,
              final String className,
              final String methodName,
              final String asyncMethodName,
              final List<String> paramTypes,
              boolean async,
              boolean isStatic,
              boolean beforeAppStart,
              App app
      ) {
          int eventCnt = null == events ? 0 : events.size();
          int delayedEventCnt = null == delayedEvents ? 0 : delayedEvents.size();
          E.illegalArgumentIf(eventCnt == 0 && delayedEventCnt == 0);
          E.illegalArgumentIf(eventCnt > 0 & delayedEventCnt > 0);
          this.events = events;
          this.delayedEvents = delayedEvents;
          this.className = $.requireNotNull(className);
          this.methodName = $.requireNotNull(methodName);
          this.asyncMethodName = asyncMethodName;
  
          this.async = async;
          this.isStatic = isStatic;
          this.beforeAppStart = beforeAppStart;
          SysEventId hookOn = beforeAppStart ? SysEventId.DEPENDENCY_INJECTOR_LOADED : SysEventId.DEPENDENCY_INJECTOR_PROVISIONED;
          app.jobManager().on(hookOn, jobId(), new Runnable() {
              @Override
              public void run() {
                  SimpleEventListenerMetaInfo.this.paramTypes = convert(paramTypes, className, methodName, $.<Method>var());
              }
          });
      }
  
      public String jobId() {
          S.Buffer buf = S.buffer("SimpleEventListenerByteCodeScanner:init:" )
                  .append(className).append(".").append(methodName);
          if (null != asyncMethodName) {
              buf.append("|").append(asyncMethodName);
          }
          return buf.toString();
      }
  
      public List<?> events() {
          if (!delayedEvents.isEmpty()) {
              List list = new ArrayList();
              for ($.Func0 func : delayedEvents) {
                  list.add(func.apply());
              }
              return list;
          }
          return events;
      }
  
      public String className() {
          return className;
      }
  
      public String methodName() {
          return methodName;
      }
  
      public String asyncMethodName() {
          return asyncMethodName;
      }
  
      public List<BeanSpec> paramTypes() {
          return paramTypes;
      }
  
      public boolean isAsync() {
          return async;
      }
  
      public boolean isStatic() {
          return isStatic;
      }
  
      public boolean beforeAppStart() {
          return beforeAppStart;
      }
  
      public static List<BeanSpec> convert(List<String> paramTypes, String className, String methodName, $.Var<Method> methodHolder) {
          int sz = paramTypes.size();
          App app = Act.app();
          Class c = app.classForName(className);
          Class[] paramClasses = new Class[sz];
          int i = 0;
          for (String s : paramTypes) {
              paramClasses[i++] = app.classForName(s);
          }
          Method method = $.getMethod(c, methodName, paramClasses);
          method.setAccessible(true);
          methodHolder.set(method);
          if (0 == sz) {
              return C.list();
          }
          List<BeanSpec> retVal = new ArrayList<>(sz);
          Type[] types = method.getGenericParameterTypes();
          Annotation[][] annotations = method.getParameterAnnotations();
          DependencyInjector injector = app.injector();
          for (i = 0; i < types.length; ++i) {
              retVal.add(BeanSpec.of(types[i], annotations[i], null, injector));
          }
          return C.list(retVal);
      }
  }
  