Hi, i wanna add an item to DropDownChoice's List after form submitted. i
used for example,
private List<String> *cities*=Arrays.asList("İstanbul","Ankara","Kayseri");
final DropDownChoice<String> cityList=new
DropDownChoice<String>("sehirListesi", Model.of("İstanbul"),
new PropertyModel<List<? extends String>>(this,"cities"));
then
Form form=new Form("form"){
@Override
public void onSubmit() {
*cities*.add("İzmir");
info("Form başarıyla gönderildi");
}
};
but, i get this exceptions.
--------------------
Unexpected RuntimeException
Last cause: null
WicketMessage: Method onFormSubmitted of interface
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at [
[Component id = form]] on component [ [Component id = form]] threw an
exception
Stacktrace
Root cause:
java.lang.UnsupportedOperationException
at java.util.AbstractList.add(AbstractList.java:131)
at java.util.AbstractList.add(AbstractList.java:91)
at com.usta.HomePage$1.onSubmit(HomePage.java:74)
at org.apache.wicket.markup.html.form.Form$10.component(Form.java:1189)
at org.apache.wicket.markup.html.form.Form$10.component(Form.java:1184)
at
org.apache.wicket.util.visit.Visits.visitPostOrderHelper(Visits.java:273)
at org.apache.wicket.util.visit.Visits.visitPostOrder(Visits.java:244)
at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1182)
at org.apache.wicket.markup.html.form.Form.process(Form.java:838)
at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:762)
at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:692)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:260)
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:750)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:252)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:209)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:280)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1326)
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:940)
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:874)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
at org.eclipse.jetty.server.Server.handle(Server.java:349)
at
org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
at
org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:921)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:784)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:223)
at
org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:50)
at
org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:245)
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
at java.lang.Thread.run(Thread.java:662)
Complete stack:
org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of
interface org.apache.wicket.markup.html.form.IFormSubmitListener
targeted at [ [Component id = form]] on component [ [Component id =
form]] threw an exception
at
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:270)
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:750)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:252)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:209)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:280)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:260)
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
at
org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:750)
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:252)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:209)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:280)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
display page
view<http://localhost:8080/wicket/page?2-1.ILinkListener-displayPageViewLink>
--
Rahman USTA
Computer & Control Education Technologist
0-(531)-922-28-05
www.kodcu.com
