pagehandler.java~1~

chatper4JdonCMS.rar

package com.jdon.cms;

import com.jdon.cms.events.PageEvent;
import com.jdon.controller.events.*;
import com.jdon.controller.ServiceAction;

import com.jdon.util.Debug;

/**
 *
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Jdon.com Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author banq
 * @version 1.0
 */
public class PageHandler implements ServiceAction{

  private final static String module = PageHandler.class.getName();
  private final static PageFactory pageFactory = PageFactory.getInstance();

  public boolean perform(Event e) {

    Debug.logVerbose(" --> enter perform ..", module);

    PageEvent pageEvent = (PageEvent) e;
    if (pageEvent.getAction().equals(PageEvent.CREATE)) {

      Integer Id = pageFactory.getId();
      pageEvent.getPage().setId(Id);

    }

    return delegate(pageEvent);


  }

  public Page getPage(Integer Id) {

    Debug.logVerbose(" --> get a exsited page", module);

    Page page = new Page();
    page.setId(Id);

    PageEvent pageEvent = new PageEvent();
    pageEvent.setAction(PageEvent.QUERY);
    pageEvent.setPage(page);

    delegate(pageEvent);

    return page;

  }

  public Navlink getNavlink(){
     return pageFactory.getNavlink();
  }

  /**
   * delegate to Builder pattern
   * @param pageEvent
   * @return
   */
  private boolean delegate(PageEvent pageEvent) {

    PageBuilder pageBuilder = new StandardPageBuilder(pageEvent);
    PageRender render = new PageRender(pageBuilder);

    Integer Id = pageEvent.getPage().getId();

   if (pageEvent.getAction().equals(PageEvent.DELETE)) {
      render.unConstruct(Id);
   }else{
     if (render.construct(Id)) {
       pageBuilder.getPage();
       return true;
     }
   }
    return false;

  }

}