Spring Framework example source code file (ViewCategoryAction.java)

This example Spring Framework source code file (ViewCategoryAction.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

baseaction, cannot, category, category, http, httpservletresponse, illegalstateexception, pagedlistholder, pagedlistholder, request, response, servlet, string, string, viewcategoryaction, viewproductaction_category, viewproductaction_productlist, viewproductaction_productlist

The Spring Framework ViewCategoryAction.java source code

package org.springframework.samples.jpetstore.web.struts;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import org.springframework.beans.support.PagedListHolder;
import org.springframework.samples.jpetstore.domain.Category;

public class ViewCategoryAction extends BaseAction {

  public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
    String categoryId = request.getParameter("categoryId");
    if (categoryId != null) {
			Category category = getPetStore().getCategory(categoryId);
      PagedListHolder productList = new PagedListHolder(getPetStore().getProductListByCategory(categoryId));
			productList.setPageSize(4);
			request.getSession().setAttribute("ViewProductAction_category", category);
			request.getSession().setAttribute("ViewProductAction_productList", productList);
			request.setAttribute("category", category);
			request.setAttribute("productList", productList);
    }
		else {
			Category category = (Category) request.getSession().getAttribute("ViewProductAction_category");
			PagedListHolder productList = (PagedListHolder) request.getSession().getAttribute("ViewProductAction_productList");
			if (category == null || productList == null) {
				throw new IllegalStateException("Cannot find pre-loaded category and product list");
			}
      String page = request.getParameter("page");
      if ("next".equals(page)) {
        productList.nextPage();
      }
			else if ("previous".equals(page)) {
        productList.previousPage();
      }
			request.setAttribute("category", category);
			request.setAttribute("productList", productList);
    }
    return mapping.findForward("success");
  }

}