[ Disclaimer: Others may disagree - I'm new at this ;) ] The best way is to assign one property to be a HashMap. There are limitations - but none that have really stood in my apps way...
1. See MapBackedForm example in 4.3.2 Map-backed ActionForms of http://jakarta.apache.org/struts/userGuide/building_controller.html#config. - It is possible to refer to elements in the jsp, that do not (yet) have even corresponding entries in the map... very cool... (see above) 2. On that note, a combination of DynaBean form and mapbackedform would probably look like <form-bean> ... <form-property name="value" type="java.util.HashMap" /> ... </form-bean> !! HOWEVER !! I had significant problems using the above for <html:text name="mydynabean" property="value(keyname)" /> beanUtils refused to populate the field - although it would render. logic:iterate had a problem even when i dealt with each element as a type="Map.MapEntry". Craig, maybe it is not putting the Map.Entry back in place on a populate?? I did have problems using :text and MapEntry - it wouldnt populate to save it's life... Anyway, I didn't get what I wanted from DynaBean. So I've since just 'extended' ValidatorActionForm, http://jakarta.apache.org/struts/api/org/apache/struts/validator/ValidatorAc tionForm.html which seems to work pretty well even with validating fields of Map (truely dynamic) variables without problem, like this: package com.hp.sm.model; import java.util.Map; import java.util.HashMap; import javax.servlet.http.HttpServletRequest; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.commons.beanutils.PropertyUtils; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionErrors; public class SmModelForm extends org.apache.struts.validator.ValidatorActionForm { private static Log log = LogFactory.getLog(SmModelForm.class); private static boolean debug = true; private final Map values = new HashMap(); private final Map login = new HashMap(); public void setValue(String key, Object value) { values.put(key, value); } public Object getValue(String key) { return values.get(key); } public ActionErrors validate( ActionMapping mapping, HttpServletRequest request) { // validate using the commons-validator and validation.xml ActionErrors errors = super.validate(mapping, request); // perform our additional validation here. if ( (errors==null) || (errors.isEmpty()) ) errors = SmModelHelper.validateSmModelForm( this, request.getSession().getServletContext() ); if ( (errors==null) || (errors.isEmpty()) ) return null; return (errors); } public void reset() { log.info(" reset();"); values.clear(); // add some fields I want ... setValue("prevState" , new java.lang.String() ); setValue("state" , new java.lang.String() ); setValue("valid" , new java.lang.String() ); setValue("validateModel" , new java.lang.String() ); } } [validation.xml] 11 <formset> 33 <form name="/login"> 34 <field <!-- a dynamic map backed property --> 35 property="value(password)" 36 depends="required" > 37 <arg0 key="loginForm.password.error.label" /> 38 </field> 40 <field 41 property="value(email)" 42 depends="required,email" > 43 <arg0 key="loginForm.email.error.label" /> 44 </field> 45 </form> 57 </formset> 59 </form-validation> -----Original Message----- From: Chalkidis Spyros [mailto:[EMAIL PROTECTED] Sent: Monday, March 17, 2003 4:26 AM To: [EMAIL PROTECTED] Subject: Real dynamic properties Hello, is there a way to configure the properties of a DynaActionForm really dynamically? I mean not to define them in the struts-config.xml but through java code? Thanks in advance, Spyros Halkidis --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
