/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.windows.wmi;
   
   import java.util.Objects;
   
   import com.sun.jna.platform.win32.COM.WbemcliUtil.WmiQuery;
  import com.sun.jna.platform.win32.COM.WbemcliUtil.WmiResult;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.util.platform.windows.WmiQueryHandler;
  
  /**
   * Utility to query WMI class {@code Win32_Fan}
   */
  @ThreadSafe
  public final class Win32Fan {
  
      private static final String WIN32_FAN = "Win32_Fan";
  
      /**
       * Fan speed property.
       */
      public enum SpeedProperty {
          DESIREDSPEED;
      }
  
      private Win32Fan() {
      }
  
      /**
       * Queries the fan speed.
       *
       * @return Currently requested fan speed, defined in revolutions per minute, when a variable speed fan is supported.
       */
      public static WmiResult<SpeedProperty> querySpeed() {
          WmiQuery<SpeedProperty> fanQuery = new WmiQuery<>(WIN32_FAN, SpeedProperty.class);
          return Objects.requireNonNull(WmiQueryHandler.createInstance()).queryWMI(fanQuery);
      }
  }