content: /*
   * Copyright (c) 2015. Rick Hightower, Geoff Chandler
   *
   * 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.
   *
   * QBit - The Microservice lib for Java : JSON, WebSocket, REST. Be The Web!
   */
  
  package io.advantageous.qbit.boon.service.impl;
  
  import io.advantageous.boon.core.reflection.ClassMeta;
  import io.advantageous.boon.core.reflection.MethodAccess;
  import io.advantageous.qbit.boon.service.impl.queuecallbacks.AnnotationDrivenQueueCallbackHandler;
  import io.advantageous.qbit.boon.service.impl.queuecallbacks.DynamicQueueCallbackHandler;
  import io.advantageous.qbit.queue.QueueCallBackHandler;
  
  /**
   * created by rhightower on 2/10/15.
   */
  public class QueueCallbackHandlerFactory {
  
  
      public static final String QUEUE_CALLBACK_ANNOTATION_NAME = "QueueCallback";
  
      static QueueCallBackHandler createQueueCallbackHandler(Object service) {
  
          if (service instanceof QueueCallBackHandler) {
              return (QueueCallBackHandler) service;
          } else {
              if (hasQueueCallbackAnnotations(service)) {
                  return new AnnotationDrivenQueueCallbackHandler(service);
              } else {
                  return new DynamicQueueCallbackHandler(service);
              }
          }
  
      }
  
      private static boolean hasQueueCallbackAnnotations(Object service) {
          @SuppressWarnings("unchecked") ClassMeta<Class<?>> classMeta = (ClassMeta<Class<?>>) ClassMeta.classMeta(service.getClass());
          final Iterable<MethodAccess> methods = classMeta.methods();
  
          for (MethodAccess methodAccess : methods) {
              if (methodAccess.hasAnnotation(QUEUE_CALLBACK_ANNOTATION_NAME)) {
                  return true;
              }
  
          }
          return false;
      }
  }
  