/*
    * Copyright 2016-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.hardware.common;
   
   import static oshi.util.Memoizer.defaultExpiration;
   import static oshi.util.Memoizer.memoize;
   
  import java.util.Arrays;
  import java.util.function.Supplier;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.hardware.Sensors;
  
  /**
   * Sensors from WMI or Open Hardware Monitor
   */
  @ThreadSafe
  public abstract class AbstractSensors implements Sensors {
  
      private final Supplier<Double> cpuTemperature = memoize(this::queryCpuTemperature, defaultExpiration());
  
      private final Supplier<int[]> fanSpeeds = memoize(this::queryFanSpeeds, defaultExpiration());
  
      private final Supplier<Double> cpuVoltage = memoize(this::queryCpuVoltage, defaultExpiration());
  
      @Override
      public double getCpuTemperature() {
          return cpuTemperature.get();
      }
  
      protected abstract double queryCpuTemperature();
  
      @Override
      public int[] getFanSpeeds() {
          return fanSpeeds.get();
      }
  
      protected abstract int[] queryFanSpeeds();
  
      @Override
      public double getCpuVoltage() {
          return cpuVoltage.get();
      }
  
      protected abstract double queryCpuVoltage();
  
      @Override
      public String toString() {
          StringBuilder sb = new StringBuilder();
          sb.append("CPU Temperature=").append(getCpuTemperature()).append("C, ");
          sb.append("Fan Speeds=").append(Arrays.toString(getFanSpeeds())).append(", ");
          sb.append("CPU Voltage=").append(getCpuVoltage());
          return sb.toString();
      }
  }