FormViewDispatchAction


1   package net.sourceforge.formview.struts.action;
2   
3   import javax.servlet.ServletContext  ;
4   import javax.servlet.http.HttpServletRequest  ;
5   import javax.servlet.http.HttpServletResponse  ;
6   import net.sourceforge.formview.FormViewConstants;
7   import net.sourceforge.formview.util.WEBFormViewUtil;
8   
9   import org.apache.struts.action.ActionForm;
10  import org.apache.struts.action.ActionForward;
11  import org.apache.struts.action.ActionMapping;
12  import org.apache.struts.actions.DispatchAction;
13  
14  /**
15   * Description : Manage FormView and state into action forward.
16   *
17   * @author <a HREF="mailto:angelo.zerr@gmail.com">Angelo ZERR</a>
18   * 
19   */
20  public abstract class FormViewDispatchAction extends DispatchAction {
21  
22      
23      /**
24       * Save FormView into request with name of form (path of mapping)  
25       * @param mapping
26       * @param actionForm
27       * @param request
28       * @param response
29       * @param name
30       * @return
31       * @throws Exception
32       */
33      protected ActionForward dispatchMethod(ActionMapping mapping, 
34              ActionForm form, HttpServletRequest   request, HttpServletResponse   response, String   name)
35              throws Exception   {
36          ActionForward actionForward = super.dispatchMethod(mapping, form, request, response, name);
37          // Save formview into request
38          // with formName (=path)
39          ServletContext   context = getServlet().getServletContext();
40          WEBFormViewUtil.saveFormView(request, context, mapping.getPath());
41          if (WEBFormViewUtil.isMergeFormViewWithStrutsActionErrors(request))
42              // Merge with struts action errors
43              WEBFormViewUtil.mergeFormViewWithStrutsActionErrors(request, context);
44          return actionForward;
45      }
46      
47      /**
48       * Reload action : call dispatch display.
49       * You can override this dispatch if you want to do another.
50       * @param mapping
51       * @param actionForm
52       * @param request
53       * @param response
54       * @return
55       * @throws Exception
56       */
57      public ActionForward reload(ActionMapping mapping, ActionForm actionForm,
58              HttpServletRequest   request, HttpServletResponse   response)
59              throws Exception   {
60          return display(mapping, actionForm, request, response);
61      }
62      
63      /**
64       * Dispatch Display To Implement 
65       * (ex : load Business Object list...)  
66       * @param mapping
67       * @param actionForm
68       * @param request
69       * @param response
70       * @return
71       * @throws Exception
72       */
73      public abstract ActionForward display(ActionMapping mapping,
74              ActionForm actionForm, HttpServletRequest   request,
75              HttpServletResponse   response) throws Exception  ; 
76      
77      /**
78       * Load Create dispatch action : Set state to CREATE 
79       * and call load dispatch Action.
80       * @param mapping
81       * @param form
82       * @param request
83       * @param response
84       * @param dispatchName
85       * @return
86       * @throws Exception
87       */
88      public final ActionForward loadCreate(ActionMapping mapping, ActionForm form,
89              HttpServletRequest   request, HttpServletResponse   response)
90              throws Exception   {
91          // Set state to CREATE
92          WEBFormViewUtil.saveState(request, getServlet().getServletContext(), FormViewConstants.STATE_CREATE);
93          return load(mapping, form, request, response);
94      }
95  
96      /**
97       * Load Create dispatch action : Set state to READ 
98       * and call load dispatch Action.
99       * @param mapping
100      * @param form
101      * @param request
102      * @param response
103      * @param dispatchName
104      * @return
105      * @throws Exception
106      */
107     public final ActionForward loadRead(ActionMapping mapping, ActionForm form,
108             HttpServletRequest   request, HttpServletResponse   response)
109             throws Exception   {
110         // Set state to READ
111         WEBFormViewUtil.saveState(request, getServlet().getServletContext(), FormViewConstants.STATE_READ);
112         return load(mapping, form, request, response);
113     }
114 
115     /**
116      * Load Create dispatch action : Set state to UPDATE 
117      * and call load dispatch Action.
118      * @param mapping
119      * @param form
120      * @param request
121      * @param response
122      * @param dispatchName
123      * @return
124      * @throws Exception
125      */
126     public final ActionForward loadUpdate(ActionMapping mapping, ActionForm form,
127             HttpServletRequest   request, HttpServletResponse   response)
128             throws Exception   {
129         // Set state to UPDATE
130         WEBFormViewUtil.saveState(request, getServlet().getServletContext(), FormViewConstants.STATE_UPDATE);
131         return load(mapping, form, request, response);
132     }
133     
134     public abstract ActionForward load(ActionMapping mapping,
135             ActionForm actionForm, HttpServletRequest   request,
136             HttpServletResponse   response) throws Exception  ; 
137 }
138
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