I'm almost there. I didn't suspect that it would work that way with the iterator. Should have tried it first! Thanks Dave.
On the way back, such as in a post, if BaseObject is an interface or abstract, as I'm hoping for it to be, then Struts tries to instantiate the BaseObject type, which it can't, so it throws: [com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler] Could not create and/or set value back on to object java.lang.InstantiationException at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30) at java.lang.reflect.Constructor.newInstance(Constructor.java:501) at java.lang.Class.newInstance0(Class.java:350) at java.lang.Class.newInstance(Class.java:303) at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:130) at com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.createObject(InstantiatingNullHandler.java:159) at com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.nullPropertyValue(InstantiatingNullHandler.java:137) at com.opensymphony.xwork2.ognl.OgnlNullHandlerWrapper.nullPropertyValue(OgnlNullHandlerWrapper.java:21) at ognl.ASTProperty.getValueBody(ASTProperty.java:118) ...etc. Any ideas on solving that? - Eric On Mon, Dec 3, 2012 at 11:19 AM, Eric Lentz <ericle...@outfastsource.com>wrote: > I have > List<BaseObject> foo > > The list is of type BaseObjectImpl > > BaseObject has fields: > String a > String b > > BaseObjectImpl has fields: > String c > String d > > Now I'm in a JSP and want to iterate foo (using <s:iterator>), accessing > fields c and d (inside iterator using <s:property>, for example). How? As > far as Struts knows I'm dealing with BaseObject. Is there a way for me to > cast to BaseObjectImpl without creating a StrutsTypeConverter for every > object I'm extending? In my use case, there will be several and the > temptation is to just define the list with the implementation which foils > reusability patterns (e.g., List<BaseObjectImpl>). > > Likewise, what to do when posting back to a field like this: > BaseObject bar (which has BaseObjectImpl as its implementation) e.g., > <s:textfield name="bar.c" /> > > > Is there a totally different approach that would be better or is > StrutsTypeConverter the only good answer? > > - Eric > >
