content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * Licensed 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
   *
   * https://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 io.aeron.cluster;
  
  import org.agrona.concurrent.status.AtomicCounter;
  import org.agrona.concurrent.status.CountersReader;
  
  interface ToggleApplication<T extends Enum<T>>
  {
      T get(AtomicCounter counter);
  
      boolean apply(AtomicCounter counter, T targetState);
  
      AtomicCounter find(CountersReader countersReader, int clusterId);
  
      @SuppressWarnings("BooleanMethodIsAlwaysInverted")
      boolean isNeutral(T toggleState);
  
      /**
       * Cluster control toggle.
       */
      ToggleApplication<ClusterControl.ToggleState> CLUSTER_CONTROL = new ToggleApplication<ClusterControl.ToggleState>()
      {
          public ClusterControl.ToggleState get(final AtomicCounter counter)
          {
              return ClusterControl.ToggleState.get(counter);
          }
  
          public boolean apply(final AtomicCounter counter, final ClusterControl.ToggleState targetState)
          {
              return targetState.toggle(counter);
          }
  
          public AtomicCounter find(final CountersReader countersReader, final int clusterId)
          {
              return ClusterControl.findControlToggle(countersReader, clusterId);
          }
  
          public boolean isNeutral(final ClusterControl.ToggleState toggleState)
          {
              return ClusterControl.ToggleState.NEUTRAL == toggleState;
          }
      };
  
      /**
       * Node state file control toggle.
       */
      ToggleApplication<NodeControl.ToggleState> NODE_CONTROL = new ToggleApplication<NodeControl.ToggleState>()
      {
          public NodeControl.ToggleState get(final AtomicCounter counter)
          {
              return NodeControl.ToggleState.get(counter);
          }
  
          public boolean apply(final AtomicCounter counter, final NodeControl.ToggleState targetState)
          {
              return targetState.toggle(counter);
          }
  
          public AtomicCounter find(final CountersReader countersReader, final int clusterId)
          {
              return NodeControl.findControlToggle(countersReader, clusterId);
          }
  
          public boolean isNeutral(final NodeControl.ToggleState toggleState)
          {
              return NodeControl.ToggleState.NEUTRAL == toggleState;
          }
      };
  }
  