package com.atlassian.plugin.event.events;
   
   import com.atlassian.annotations.PublicApi;
   import com.atlassian.plugin.Plugin;
   import com.atlassian.plugin.PluginState;
   
   import javax.annotation.Nonnull;
   import java.util.Set;
   
  import static com.google.common.base.Preconditions.checkArgument;
  import static com.google.common.base.Preconditions.checkNotNull;
  
  /**
   * Event fired after dependent plugins have changed their state in response to a change in this plugin's state i.e.
   * install, enable, uninstall, disable.
   *
   * @see com.atlassian.plugin.event.events
   * @since 4.0.0
   */
  @PublicApi
  public class PluginDependentsChangedEvent extends PluginEvent {
      final PluginState state;
      final Set<Plugin> disabled;
      final Set<Plugin> cycled;
  
      public PluginDependentsChangedEvent(final Plugin plugin, @Nonnull final PluginState state, @Nonnull final Set<Plugin> disabled, @Nonnull final Set<Plugin> cycled) {
          super(plugin);
          this.state = checkNotNull(state);
          checkArgument(state == PluginState.INSTALLED || state == PluginState.ENABLED || state == PluginState.UNINSTALLED || state == PluginState.DISABLED, "state must be one of INSTALLED, ENABLED, UNINSTALLED, DISABLED");
          this.disabled = checkNotNull(disabled);
          this.cycled = checkNotNull(cycled);
      }
  
      /**
       * End state of plugin that caused this event.
       *
       * @return one of {@link PluginState#INSTALLED}, {@link PluginState#ENABLED}, {@link PluginState#UNINSTALLED}, {@link PluginState#DISABLED}
       */
      public PluginState getState() {
          return state;
      }
  
      /**
       * Plugins which had their state changed from enabled to disabled
       *
       * @return possibly empty set
       */
      public Set<Plugin> getDisabled() {
          return disabled;
      }
  
      /**
       * Plugins which had their state changed from enabled to disabled to enabled
       *
       * @return possibly empty set
       */
      public Set<Plugin> getCycled() {
          return cycled;
      }
  
      @Override
      public String toString() {
          return super.toString() + ", disabled=" + disabled + ", cycled=" + cycled;
      }
  }