I have a checkbox and dropdown in a html page . On click of submit if both of them are selected , their should be a error message that any one of them should be mandatory field and asked to select one value atleast.
I created a new class as as FormValidator implementing IValidator and override the validate method. But i am unaware how to use the dropdown choice value and checkbox value on submit method call ad how to display in html .
Java code -
IModel<Project> dropdownModel = new PropertyModel<Project>(criteria,"selectedBillableProject");
DropDownChoice<Project> billableProjectsList = new DropDownChoice<>(
"projectsList",
dropdownModel,
billableProjects,
new ChoiceRenderer<Project>("fullNameWithCustomer"));
billableProjectsList.setLabel(new ResourceModel("printMonth.billable"));
form.add(billableProjectsList);
}
protected void onSubmit() {
.....
validateInputComponents(reportCriteria);
.....
}
public void validateInputComponents(ReportCriteria reportCriteria){
add(new FormComponentValidator(reportCriteria.getSelectedBillableProject(), unbillableProjectsView.getModelObject()));
}
I have updated the FormComponentValidtor similar to the :https://cwiki.apache.org/confluence/display/WICKET/Validating+related+fields
But its resulting in below error onSubmit (). 11-26@22:37:25 ERROR org.apache.wicket.request.cycle.RequestCycle - Error during processing error message java.lang.IllegalStateException: STREAM at org.eclipse.jetty.server.Response.getWriter(Response.java:693) at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:152) at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:152) at org.springframework.security.web.context.SaveContextOnUpdateOrErrorResponseWrapper.getWriter(SaveContextOnUpdateOrErrorResponseWrapper.java:125) at org.apache.wicket.protocol.http.servlet.ServletWebResponse.write(ServletWebResponse.java:109) at org.apache.wicket.protocol.http.HeaderBufferingWebResponse.write(HeaderBufferingWebResponse.java:179) at org.apache.wicket.protocol.http.BufferedWebResponse$WriteCharSequenceAction.invoke(BufferedWebResponse.java:171) at org.apache.wicket.protocol.http.BufferedWebResponse.writeTo(BufferedWebResponse.java:602) at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:232) at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175) at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:890) at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:310) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.executeExceptionRequestHandler(RequestCycle.java:319) at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:233) at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289) at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259) at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201) at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1484) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1484) at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:151) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1476) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:370) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:982) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1043) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:748)
Am i missing something . Please help
looks like your are missing a FeedbackPanel in your form to display validation errors/messages. Take a look at the user guide here and follow the entire example:
https://ci.apache.org/projects/wicket/guide/8.x/single.html#_form_validation_and_feedback_messages