content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.camel.component.webhook;
  
  import java.util.Set;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.Component;
  import org.apache.camel.NoSuchBeanException;
  import org.apache.camel.spi.RestConsumerFactory;
  
  /**
   * Some utilities for the webhook component.
   */
  public final class WebhookUtils {
  
      private static final String[] DEFAULT_REST_CONSUMER_COMPONENTS
              = new String[] { "coap", "netty-http", "jetty", "servlet", "undertow" };
  
      private WebhookUtils() {
      }
  
      /**
       * Used to locate the most suitable {@code RestConsumerFactory}.
       */
      public static RestConsumerFactory locateRestConsumerFactory(CamelContext context, WebhookConfiguration configuration) {
          RestConsumerFactory factory = null;
          if (configuration.getWebhookComponentName() != null) {
              Object comp = context.getRegistry().lookupByName(configuration.getWebhookComponentName());
              if (comp instanceof RestConsumerFactory) {
                  factory = (RestConsumerFactory) comp;
              } else {
                  comp = context.getComponent(configuration.getWebhookComponentName());
                  if (comp instanceof RestConsumerFactory) {
                      factory = (RestConsumerFactory) comp;
                  }
              }
  
              if (factory == null) {
                  if (comp != null) {
                      throw new IllegalArgumentException(
                              "Component " + configuration.getWebhookComponentName() + " is not a RestConsumerFactory");
                  } else {
                      throw new NoSuchBeanException(configuration.getWebhookComponentName(), RestConsumerFactory.class.getName());
                  }
              }
          }
  
          // try all components
          if (factory == null) {
              for (String name : context.getComponentNames()) {
                  Component comp = context.getComponent(name);
                  if (comp instanceof RestConsumerFactory) {
                      factory = (RestConsumerFactory) comp;
                      break;
                  }
              }
          }
  
          // lookup in registry
          if (factory == null) {
              Set<RestConsumerFactory> factories = context.getRegistry().findByType(RestConsumerFactory.class);
              if (factories != null && factories.size() == 1) {
                  factory = factories.iterator().next();
              }
          }
  
          // no explicit factory found then try to see if we can find any of the default rest consumer components
          // and there must only be exactly one so we safely can pick this one
          if (factory == null) {
              RestConsumerFactory found = null;
              for (String name : DEFAULT_REST_CONSUMER_COMPONENTS) {
                  Object comp = context.getComponent(name, true);
                  if (comp instanceof RestConsumerFactory) {
                      if (found == null) {
                          found = (RestConsumerFactory) comp;
                      } else {
                          throw new IllegalArgumentException(
                                  "Multiple RestConsumerFactory found on classpath. Configure explicit which component to use");
                      }
                  }
              }
              if (found != null) {
                  factory = found;
              }
          }
  
          if (factory == null) {
              throw new IllegalStateException("Cannot find RestConsumerFactory in Registry or as a Component to use");
          }
          return factory;
      }
  
  }
  