LayoutRequestProcessor


1   package fr.improve.struts.taglib.layout.workflow;
2   
3   import java.io.IOException  ;
4   import javax.servlet.ServletException  ;
5   import javax.servlet.http.HttpServletRequest  ;
6   import javax.servlet.http.HttpServletResponse  ;
7   import javax.servlet.http.HttpSession  ;
8   
9   import org.apache.struts.config.ForwardConfig;
10  import org.apache.struts.tiles.TilesRequestProcessor;
11  
12  import fr.improve.struts.taglib.layout.sort.SortUtil;
13  import fr.improve.struts.taglib.layout.treeview.TreeViewReconciler;
14  
15  /**
16   * This is the struts-layout request processor for Struts.
17   * 
18   * The processor make a cache of the datas in the request scope 
19   * so that the page can be redisplayed without invoking the application.
20   * 
21   * This processor is compatible with the Tiles processor.
22   * 
23   * @author jnribette
24   */
25  public class LayoutRequestProcessor extends TilesRequestProcessor {
26      public static final String   CONTEXT_KEY = "fr.improve.struts.taglib.layout.workflow.LayoutRequestProcessor.CONTEXT_KEY";
27      private static final String   CONTEXT_REQUIRED = "fr.improve.struts.taglib.layout.workflow.LayoutRequestProcessor.CONTEXT_REQUIRED";
28      
29      protected void processForwardConfig(HttpServletRequest   request,
30                                          HttpServletResponse   response,
31                                          ForwardConfig forward)
32          throws IOException  , ServletException   {
33          // Required by struts contract
34          if (forward != null) {
35              // Reconcile open/close treeview.
36              TreeViewReconciler.reconceileFromMenu(request, response);
37                          
38              // Process the forward.
39              super.processForwardConfig(request, response, forward);
40              
41              HttpSession   lc_session = request.getSession(false);
42              if (lc_session!=null) {
43                  SortUtil lc_sortUtil = (SortUtil) lc_session.getAttribute(SortUtil.SORTUTIL_KEY);
44                  if (lc_sortUtil!=null && "aaa".equals(request.getAttribute(SortUtil.SORTUTIL_KEY + "aaa"))) {
45                      lc_sortUtil.initSortUtil(request, forward.getPath());
46                  }
47              }
48          }
49                                          
50          // Update the layout context.
51          //updateContext(request, forward.getPath());
52      }
53  }
54
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