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.google.drive.internal;
  
  import java.util.concurrent.locks.Lock;
  import java.util.concurrent.locks.ReentrantLock;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.component.google.drive.GoogleDriveConfiguration;
  import org.apache.camel.support.component.ApiMethodPropertiesHelper;
  
  /**
   * Singleton {@link ApiMethodPropertiesHelper} for GoogleDrive component.
   */
  public final class GoogleDrivePropertiesHelper extends ApiMethodPropertiesHelper<GoogleDriveConfiguration> {
  
      private static final Lock LOCK = new ReentrantLock();
      private static GoogleDrivePropertiesHelper helper;
  
      private GoogleDrivePropertiesHelper(CamelContext context) {
          super(context, GoogleDriveConfiguration.class, GoogleDriveConstants.PROPERTY_PREFIX);
      }
  
      public static GoogleDrivePropertiesHelper getHelper(CamelContext context) {
          LOCK.lock();
          try {
              if (helper == null) {
                  helper = new GoogleDrivePropertiesHelper(context);
              }
              return helper;
          } finally {
              LOCK.unlock();
          }
      }
  }
  