package com.atlassian.plugin.servlet.descriptors;
   
   import com.atlassian.plugin.StateAware;
   import com.atlassian.plugin.module.ModuleFactory;
   import com.atlassian.plugin.servlet.ServletModuleManager;
   
   import javax.servlet.http.HttpServlet;
   
   import static com.google.common.base.Preconditions.checkNotNull;
  
  /**
   * A module descriptor that allows plugin developers to define servlets. Developers can define what urls the
   * servlet should be serve by defining one or more <url-pattern> elements.
   */
  public class ServletModuleDescriptor extends BaseServletModuleDescriptor<HttpServlet> implements StateAware {
      private final ServletModuleManager servletModuleManager;
  
      /**
       * Creates a descriptor that uses a module factory to create instances
       *
       * @since 2.5.0
       */
      public ServletModuleDescriptor(final ModuleFactory moduleFactory, final ServletModuleManager servletModuleManager) {
          super(moduleFactory);
          this.servletModuleManager = checkNotNull(servletModuleManager);
      }
  
      @Override
      public void enabled() {
          super.enabled();
          servletModuleManager.addServletModule(this);
      }
  
      @Override
      public void disabled() {
          servletModuleManager.removeServletModule(this);
          super.disabled();
      }
  
      @Override
      public HttpServlet getModule() {
          return moduleFactory.createModule(moduleClassName, this);
      }
  }