package gboat2.base.view.jsp;
   
   import gboat2.base.view.components.Overlay;
   
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   
   import org.apache.struts2.components.Component;
   import org.apache.struts2.views.jsp.ComponentTagSupport;
  
  import com.opensymphony.xwork2.util.ValueStack;
  
  /**
   * 覆盖继承的 JSP 页面中的代码块
   * 
   * @author <a href="mailto:[email protected]">何明旺</a>
   * @since 3.0
   * @date 2014年4月22日
   */
  public class OverlayTag extends ComponentTagSupport {
      
      private static final long serialVersionUID = 1L;
  
      /** 要覆盖的代码块的唯一标识，即与父页面中 block 标签的 id 值保持一致 */
      protected String id;
      
      @Override
      public Component getBean(ValueStack stack, HttpServletRequest req, HttpServletResponse res) {
          return new Overlay(stack, req);
      }
  
      @Override
      protected void populateParams() {
          super.populateParams();
          ((Overlay)component).setId(id);
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
  }