content: /*
   * Copyright (C) 2015 AChep@xda <artemchep@gmail.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA  02110-1301, USA.
   */
  package com.achep.acdisplay.services;
  
  import androidx.annotation.NonNull;
  
  import com.achep.acdisplay.Atomic;
  
  /**
   * @author Artem Chepurnoy
   */
  public abstract class SwitchService extends BathService.ChildService implements
          Atomic.Callback,
          Switch.Callback {
  
      protected Atomic mListeningAtom;
      protected Switch[] mSwitches;
  
      @NonNull
      public abstract Switch[] onBuildSwitches();
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void onCreate() {
          mListeningAtom = new Atomic(this);
          mSwitches = onBuildSwitches();
  
          for (Switch switch_ : mSwitches) {
              switch_.create();
          }
  
          requestActive();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void onDestroy() {
          for (Switch switch_ : mSwitches) {
              switch_.destroy();
          }
  
          stop();
  
          mListeningAtom = null;
          mSwitches = null;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void requestActive() {
          if (mListeningAtom.isRunning()) {
              return; // Already listening, no need to check all handlers.
          }
  
          // Check through all available handlers.
          for (Switch switch_ : mSwitches) {
              if (!switch_.isCreated() || !switch_.isActive()) {
                  return;
              }
          }
  
          start();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void requestInactive() {
          stop();
      }
  
      protected void stop() {
          mListeningAtom.stop();
      }
  
      protected void start() {
          mListeningAtom.start();
      }
  
  }
  