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.cassandra.sidecar;
  
  import com.google.inject.Injector;
  import com.google.inject.Key;
  import com.google.inject.TypeLiteral;
  import org.apache.cassandra.sidecar.modules.multibindings.ClassKey;
  import org.apache.cassandra.sidecar.modules.multibindings.MultiBindingTypeResolver;
  import org.apache.cassandra.sidecar.tasks.PeriodicTask;
  
  /**
   * Test utility to find the bound instance from mapBinder
   */
  public class MultibindingsMapKeyTestUtil
  {
      private MultibindingsMapKeyTestUtil()
      {
          throw new UnsupportedOperationException();
      }
  
      /**
       * Find the periodic task of the key from the map binder
       * @param injector injector
       * @param key key
       * @return periodic task
       */
      public static <T extends PeriodicTask> T findPeriodicTask(Injector injector, Class<? extends ClassKey> key)
      {
          TypeLiteral<MultiBindingTypeResolver<PeriodicTask>> type = new TypeLiteral<>(){};
          //noinspection unchecked
          return (T) find(injector, type, key);
      }
  
      private static <T> T find(Injector injector, TypeLiteral<MultiBindingTypeResolver<T>> type, Class<? extends ClassKey> key)
      {
          return injector.getInstance(Key.get(type)).resolve().get(key);
      }
  }
  