package com.atlassian.plugin.eventlistener.descriptors;
   
   import com.atlassian.event.api.EventPublisher;
   import com.atlassian.plugin.Permissions;
   import com.atlassian.plugin.Plugin;
   import com.atlassian.plugin.PluginParseException;
   import com.atlassian.plugin.RequirePermission;
   import com.atlassian.plugin.descriptors.AbstractModuleDescriptor;
   import com.atlassian.plugin.module.ModuleFactory;
  import com.atlassian.util.concurrent.LazyReference;
  import com.atlassian.util.concurrent.NotNull;
  import org.dom4j.Element;
  
  @RequirePermission(Permissions.EXECUTE_JAVA)
  public class EventListenerModuleDescriptor extends AbstractModuleDescriptor<Object>
  {
      private final EventPublisher eventPublisher;
  
      private LazyReference<Object> moduleObj = new LazyReference<Object>()
      {
          @Override
          protected Object create() throws Exception
          {
              return moduleFactory.createModule(moduleClassName, EventListenerModuleDescriptor.this);
          }
      };
  
      public EventListenerModuleDescriptor(ModuleFactory moduleFactory, EventPublisher eventPublisher)
      {
          super(moduleFactory);
          this.eventPublisher = eventPublisher;
      }
  
      @Override
      public void init(@NotNull Plugin plugin, @NotNull Element element) throws PluginParseException
      {
          super.init(plugin, element);
          checkPermissions();
      }
  
      @Override
      public Object getModule()
      {
          return moduleObj.get();
      }
  
      @Override
      public void enabled()
      {
          super.enabled();
          eventPublisher.register(getModule());
      }
  
      public void disabled()
      {
          eventPublisher.unregister(getModule());
          super.disabled();
      }
  }