And what happens if myForm.get("somekey") == null? Right, NPE.
BeanUtils.geProperty will convert the property value to a String.
PropertyUtils.getProperty will just return the property value as an Object
without any conversion.String foo = BeanUtils.geProperty(form, "somekey"); http://jakarta.apache.org/commons/beanutils/ Quoting Ian Hunter <[EMAIL PROTECTED]>: > > 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" > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- Kris Schneider <mailto:[EMAIL PROTECTED]> D.O.Tech <http://www.dotech.com/> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
