forgot about String Object.toString() method. Looks a little tidier,
doesn't it? Anyway, it should literally be calling the same code. I'm
hoping BeanUtils can somehow handle translations between types like
java.util.Date and String...I'll look into it later.
----- Original Message -----
From: "Mark Lowe" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
Sent: Thursday, March 13, 2003 9:28 AM
Subject: Re: Example of accessing DynaActionFrom properties from within an
Action
I had a headache over all this until i spent a couple fo days using the
beanutils package..
org.apache.common.beanutils
The dynaaction forms are basically the same..
your means of extracting the stored values from the form look like they
should work , although i prefer using toString() rather than casting
the world..
DynaActionForm myForm = (DynaActionForm) form;
String foo = myForm.get("somekey").toString();
So what you are doing works for me...
hope this helps mark
Gioved�, 13 mar 2003, alle 15:03 Europe/Rome, Ian Hunter ha scritto:
> Since this isn't as clear as it could be, here's an example for anyone
> who
> cares:
>
>> (this class adds or updates a bulletin on a message board; all data
>> access
>> goes through a central service called the "DataStore")
>>
>> public final class UpdateBulletinAction extends Action {
>>
>> public ActionForward execute(ActionMapping mapping, ActionForm
>> form,
>> HttpServletRequest request, HttpServletResponse response)
>> throws Exception {
>>
>> ActionErrors errors = new ActionErrors();
>>
>> DynaActionForm dynaForm = (DynaActionForm) form;
>> UserView user =
>> (UserView)request.getSession().getAttribute(Constants.USER_KEY);
>>
>> if (((String)((DynaActionForm)form).get ("id")).equals ("0"))
>> { //
>> ID = 0 means we're adding a bulletin
>> try {
>> BulletinView bv = DataStore.getNewBulletinView();
>> bv.setAccessLevel ((String)dynaForm.get
>> ("accessLevel"));
>> bv.setMessage ((String)dynaForm.get("message"));
>> DataStore.addBulletinView (bv);
>> } catch (ViewRecAddException e) {
>> servlet.log("An error occurred while user " +
>> user.getName() + " was adding a bulletin:\n" +
>> e.toString());
>> e.printStackTrace();
>> errors.add(ActionErrors.GLOBAL_ERROR,
>> new ActionError("error.databaseerror"));
>> }
>> } else { // Since we have an ID, we're updating a bulletin
>> try {
>> BulletinView bv =
>> DataStore.getBulletinViewById((String)dynaForm.get("id"));
>> bv.setAccessLevel
> ((String)dynaForm.get("accessLevel"));
>> bv.setMessage ((String)dynaForm.get("message"));
>> DataStore.updateBulletinView (bv);
>> } catch (ViewRecLoadException e) {
>> servlet.log("An error occurred while trying to get
>> bulletin ID=" + (String)dynaForm.get("id") + " for update by user " +
>> user.getName() +
>> ":\n" + e.toString());
>> e.printStackTrace();
>> errors.add(ActionErrors.GLOBAL_ERROR,
>> new ActionError("error.databaseerror"));
>> } catch (ViewRecUpdateException e) {
>> servlet.log("An error occurred while user " +
>> user.getName() + " was updating bulletin with ID=" +
>> (String)dynaForm.get("id") +
>> ":\n" + e.toString());
>> e.printStackTrace();
>> errors.add(ActionErrors.GLOBAL_ERROR,
>> new ActionError("error.databaseerror"));
>> }
>> if (!errors.isEmpty()) {
>> saveErrors(request, errors);
>> return (new ActionForward(mapping.getInput()));
>> }
>>
>> return (mapping.findForward("success"));
>> }
>> }
>>
>> so to refer to a property of a DynaActionForm within an action, you do
>> something like
>>
>> DynaActionFrom dynaForm = (DynaActionForm) form;
>> // variable "form" comes from method execute's signature
>>
>> someVariable = (className)dynaForm.get("propertyName");
>> // to get the property; DynaActionForm.get(String property) returns an
> Object, so you have to cast it
>>
>> dynaForm.set("propertyName", someVariable);
>> // to set the property; the class of the second parameter is, again,
> "Object"
>
>
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