src/beans/CategoryManager.java


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/*
 * $RCSFile$
 *
 * Created on 08.03.2007
 * for Project: 
 * by steins
 *
 * (C) 2005-2006 by 
 */
package beans;

import java.io.IOException;
import java.util.Collection;
import java.util.Map;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;

import jpa.Category;
import jpa.EntityManagerFactorySingleton;

@ManagedBean(name = "CategoryManager")
@SessionScoped
public class CategoryManager
{
   private Category current;

   public Category getCurrent()
   {
      return current;
   }

   public void setCurrent(Category current)
   {
      this.current = current;
   }

   public Collection getCategories()
   {
      EntityManager manager = EntityManagerFactorySingleton.getInstance()
            .getEntityManagerFactory().createEntityManager();

      Collection categories = manager.createQuery("SELECT c FROM Category c ")
            .getResultList();
      manager.close();

      return categories;
   }

   public void select(javax.faces.event.ActionEvent actionEvent)
   {
      FacesContext facesContext = FacesContext.getCurrentInstance();
      Map params = facesContext.getExternalContext().getRequestParameterMap();
      Integer selectedId = Integer.valueOf((String) params.get("selectedId"));
      // System.out.println(selectedId);

      EntityManager manager = EntityManagerFactorySingleton.getInstance()
            .getEntityManagerFactory().createEntityManager();

      EntityTransaction tx = manager.getTransaction();
      tx.begin();
      try
      {
         current = manager.find(Category.class, selectedId);
         // System.out.println(current.getName());
         tx.commit();
      }
      catch (Exception ex)
      {
         ex.printStackTrace(System.err);
         tx.rollback();
      }

      FacesContext context = FacesContext.getCurrentInstance();
      try
      {
         context.getExternalContext().redirect("products.jsf");
      }
      catch (IOException e)
      {
         e.printStackTrace();
      }
      context.responseComplete();
      manager.close();
   }
}